Como: Redimensionar automaticamente células quando conteúdo for alterado no controle do Windows Forms DataGridView
Você pode configurar o DataGridView o controle para redimensionar suas linhas, colunas e a cabeçalhos automaticamente sempre que o conteúdo é alterado, para que as células são sempre grandes o suficiente para exibir seus valores sem corte.
Você tem várias opções para restringir quais células são usadas para determinar os tamanhos de novos. Por exemplo, você pode configurar o controle para redimensionar automaticamente a largura de suas colunas com base apenas nos valores nas linhas atualmente exibidas. Com isso, você pode evitar ineficiência ao trabalhar com um grande número de linhas, embora nesse caso, convém usar os métodos de dimensionamento como AutoResizeColumns para ajustar os tamanhos em horários de sua preferência.
Para obter mais informações sobre o redimensionamento automático, consulte Opções de controle do Windows Forms DataGridView de dimensionamento..
O exemplo de código a seguir demonstra as opções disponíveis para redimensionamento automático.
Exemplo
Public Class AutoSizing
Inherits System.Windows.Forms.Form
Friend WithEvents FlowLayoutPanel1 As FlowLayoutPanel
Friend WithEvents Button1 As Button = New Button()
Friend WithEvents Button2 As Button = New Button()
Friend WithEvents Button3 As Button = New Button()
Friend WithEvents Button4 As Button = New Button()
Friend WithEvents Button5 As Button = New Button()
Friend WithEvents Button6 As Button = New Button()
Friend WithEvents Button7 As Button = New Button()
Friend WithEvents Button8 As Button = New Button()
Friend WithEvents Button9 As Button = New Button()
Friend WithEvents Button10 As Button = New Button()
Friend WithEvents Button11 As Button = New Button()
Friend WithEvents DataGridView1 As DataGridView
Public Sub New()
MyBase.New()
InitializeComponent()
AddDirections()
AddButton(Button1, "Reset")
AddButton(Button2, "Change Column 3 Header")
AddButton(Button3, "Change Meatloaf Recipe")
AddButton(Button4, "Change Restaurant 2")
AddButtonsForAutomaticResizing()
End Sub
Private Sub AddDirections()
Dim directions As New Label()
directions.AutoSize = True
Dim newLine As String = Environment.NewLine
directions.Text = "Press the buttons that start " & newLine _
& "with 'Change' to see how different sizing " & newLine _
& "modes deal with content changes."
FlowLayoutPanel1.Controls.Add(directions)
End Sub
Private Sub InitializeComponent()
Me.FlowLayoutPanel1 = New FlowLayoutPanel
Me.FlowLayoutPanel1.FlowDirection = FlowDirection.TopDown
Me.FlowLayoutPanel1.Location = _
New System.Drawing.Point(454, 0)
Me.FlowLayoutPanel1.AutoSize = True
Me.FlowLayoutPanel1.TabIndex = 7
Me.Controls.Add(Me.FlowLayoutPanel1)
Me.Text = Me.GetType().Name
Me.AutoSize = True
End Sub
Private startingSize As Size
Private thirdColumnHeader As String = "Main Ingredients"
Private boringMeatloaf As String = "ground beef"
Private boringMeatloafRanking As String = "*"
Private boringRecipe As Boolean
Private shortMode As Boolean
Private otherRestaurant As String = "Gomes's Saharan Sushi"
Private Sub InitializeDataGridView(ByVal ignored As Object, _
ByVal ignoredToo As EventArgs) Handles Me.Load
DataGridView1 = New System.Windows.Forms.DataGridView
Controls.Add(DataGridView1)
startingSize = New Size(450, 400)
DataGridView1.Size = startingSize
SetUpColumns()
PopulateRows()
shortMode = False
boringRecipe = True
AddLabels()
End Sub
Private Sub SetUpColumns()
DataGridView1.ColumnCount = 4
DataGridView1.ColumnHeadersVisible = True
Dim columnHeaderStyle As New DataGridViewCellStyle
columnHeaderStyle.BackColor = Color.Aqua
columnHeaderStyle.Font = New Font("Verdana", 10, _
FontStyle.Bold)
DataGridView1.ColumnHeadersDefaultCellStyle = _
columnHeaderStyle
DataGridView1.Columns(0).Name = "Recipe"
DataGridView1.Columns(1).Name = "Category"
DataGridView1.Columns(2).Name = thirdColumnHeader
DataGridView1.Columns(3).Name = "Rating"
End Sub
Private Sub PopulateRows()
Dim row1 As String() = New String() _
{"Meatloaf", "Main Dish", boringMeatloaf, _
boringMeatloafRanking}
Dim row2 As String() = New String() _
{"Key Lime Pie", "Dessert", _
"lime juice, evaporated milk", _
"****"}
Dim row3 As String() = New String() _
{"Orange-Salsa Pork Chops", "Main Dish", _
"pork chops, salsa, orange juice", "****"}
Dim row4 As String() = New String() _
{"Black Bean and Rice Salad", "Salad", _
"black beans, brown rice", _
"****"}
Dim row5 As String() = New String() _
{"Chocolate Cheesecake", "Dessert", "cream cheese", _
"***"}
Dim row6 As String() = New String() _
{"Black Bean Dip", "Appetizer", "black beans, sour cream", _
"***"}
Dim rows As Object() = New Object() {row1, row2, row3, _
row4, row5, row6}
Dim rowArray As String()
For Each rowArray In rows
DataGridView1.Rows.Add(rowArray)
Next
For Each row As DataGridViewRow In DataGridView1.Rows
If row.IsNewRow Then Continue For
row.HeaderCell.Value = "Restaurant " & row.Index
Next
End Sub
Private Sub AddButton(ByVal button As Button, _
ByVal buttonLabel As String)
button.Text = buttonLabel
button.AutoSize = True
FlowLayoutPanel1.Controls.Add(button)
End Sub
Private Sub resetToDisorder(ByVal sender As Object, _
ByVal e As System.EventArgs) _
Handles Button1.Click
DataGridView1.Size = startingSize
Controls.Remove(DataGridView1)
DataGridView1.Dispose()
InitializeDataGridView(Nothing, Nothing)
End Sub
Private Sub ChangeColumn3Header(ByVal sender As Object, _
ByVal e As System.EventArgs) _
Handles Button2.Click
Toggle(shortMode)
If shortMode Then DataGridView1.Columns(2).HeaderText = "S" _
Else DataGridView1.Columns(2).HeaderText = _
thirdColumnHeader
End Sub
Private Shared Function Toggle(ByRef toggleThis As Boolean) _
As Boolean
toggleThis = Not toggleThis
Return toggleThis
End Function
Private Sub ChangeMeatloafRecipe(ByVal sender As Object, _
ByVal e As System.EventArgs) _
Handles Button3.Click
Toggle(boringRecipe)
If boringRecipe Then
SetMeatloaf(boringMeatloaf, boringMeatloafRanking)
Else
Dim greatMeatloafRecipe As String = "1 lb. lean ground beef, " _
& "1/2 cup bread crumbs, 1/4 cup ketchup," _
& "1/3 tsp onion powder, " _
& "1 clove of garlic, 1/2 pack onion soup mix, " _
& "dash of your favorite BBQ Sauce"
SetMeatloaf(greatMeatloafRecipe, "***")
End If
End Sub
Private Sub ChangeRestaurant(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles Button4.Click
If Not DataGridView1.Rows(2).HeaderCell.Value _
.Equals(otherRestaurant) Then
DataGridView1.Rows(2).HeaderCell.Value = _
otherRestaurant
Else
DataGridView1.Rows(2).HeaderCell.Value = _
"Restaurant 2"
End If
End Sub
Private Sub SetMeatloaf(ByVal recipe As String, _
ByVal rating As String)
DataGridView1.Rows(0).Cells(2).Value = recipe
DataGridView1.Rows(0).Cells(3).Value = rating
End Sub
Private currentLayoutName As String = _
"DataGridView.AutoSizeRowsMode is currently: "
Private Sub AddLabels()
Dim current As Label = CType( _
FlowLayoutPanel1.Controls(currentLayoutName), Label)
If current Is Nothing Then
current = New Label()
current.AutoSize = True
current.Name = currentLayoutName
FlowLayoutPanel1.Controls.Add(current)
current.Text = currentLayoutName & _
DataGridView1.AutoSizeRowsMode.ToString()
End If
End Sub
#Region "Automatic Resizing"
Private Sub AddButtonsForAutomaticResizing()
AddButton(Button5, "Keep Column Headers Sized")
AddButton(Button6, "Keep Row Headers Sized")
AddButton(Button7, "Keep Rows Sized")
AddButton(Button8, "Keep Row Headers Sized with RowsMode")
AddButton(Button9, "Disable AutoSizeRowsMode")
AddButton(Button10, "AutoSize third column by rows")
AddButton(Button11, "AutoSize third column by rows and headers")
End Sub
Private Sub ColumnHeadersHeightSizeMode(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles Button5.Click
DataGridView1.ColumnHeadersHeightSizeMode = _
DataGridViewColumnHeadersHeightSizeMode.AutoSize
End Sub
Private Sub RowHeadersWidthSizeMode(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles Button6.Click
DataGridView1.RowHeadersWidthSizeMode = _
DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders
End Sub
Private Sub AutoSizeRowsMode(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles Button7.Click
DataGridView1.AutoSizeRowsMode = _
DataGridViewAutoSizeRowsMode.AllCells
End Sub
Private Sub AutoSizeRowHeadersUsingAllHeadersMode _
(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles Button8.Click
DataGridView1.AutoSizeRowsMode = _
DataGridViewAutoSizeRowsMode.AllHeaders
End Sub
Private Sub WatchRowsModeChanges(ByVal sender As Object, _
ByVal modeEvent As DataGridViewAutoSizeModeEventArgs) _
Handles DataGridView1.AutoSizeRowsModeChanged
Dim label As Label = CType(FlowLayoutPanel1.Controls _
(currentLayoutName), Label)
If modeEvent.PreviousModeAutoSized Then
label.Text = "changed to different " & label.Name & _
DataGridView1.AutoSizeRowsMode.ToString()
Else
label.Text = label.Name & _
DataGridView1.AutoSizeRowsMode.ToString()
End If
End Sub
Private Sub DisableAutoSizeRowsMode(ByVal sender As Object, _
ByVal modeEvent As EventArgs) Handles Button9.Click
DataGridView1.AutoSizeRowsMode = _
DataGridViewAutoSizeRowsMode.None
End Sub
Private Sub AutoSizeOneColumn(ByVal sender As Object, _
ByVal theEvent As EventArgs) Handles Button10.Click
Dim column As DataGridViewColumn = DataGridView1.Columns(2)
column.AutoSizeMode = _
DataGridViewAutoSizeColumnMode.DisplayedCells
End Sub
Private Sub AutoSizeOneColumnIncludingHeaders(ByVal sender As Object, _
ByVal theEvent As EventArgs) Handles Button11.Click
Dim column As DataGridViewColumn = DataGridView1.Columns(2)
column.AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells
End Sub
#End Region
<STAThreadAttribute()> _
Public Shared Sub Main()
Application.Run(New AutoSizing())
End Sub
End Class
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
public class AutoSizing : System.Windows.Forms.Form
{
private FlowLayoutPanel flowLayoutPanel1;
private Button button1 = new Button();
private Button button2 = new Button();
private Button button3 = new Button();
private Button button4 = new Button();
private Button button5 = new Button();
private Button button6 = new Button();
private Button button7 = new Button();
private Button button8 = new Button();
private Button button9 = new Button();
private Button button10 = new Button();
private Button button11 = new Button();
private DataGridView dataGridView1;
public AutoSizing()
{
InitializeComponent();
this.Load += new EventHandler(InitializeDataGridView);
AddDirections();
AddButton(button1, "Reset",
new EventHandler(ResetToDisorder));
AddButton(button2, "Change Column 3 Header",
new EventHandler(ChangeColumn3Header));
AddButton(button3, "Change Meatloaf Recipe",
new EventHandler(ChangeMeatloafRecipe));
AddButton(button4, "Change Restaurant 2",
new EventHandler(ChangeRestaurant));
AddButtonsForAutomaticResizing();
}
private void AddDirections()
{
Label directions = new Label();
directions.AutoSize = true;
String newLine = Environment.NewLine;
directions.Text = "Press the buttons that start " + newLine
+ "with 'Change' to see how different sizing " + newLine
+ "modes deal with content changes.";
flowLayoutPanel1.Controls.Add(directions);
}
private void InitializeComponent()
{
flowLayoutPanel1 = new FlowLayoutPanel();
flowLayoutPanel1.FlowDirection = FlowDirection.TopDown;
flowLayoutPanel1.Location = new System.Drawing.Point(492, 0);
flowLayoutPanel1.AutoSize = true;
flowLayoutPanel1.TabIndex = 1;
ClientSize = new System.Drawing.Size(674, 419);
Controls.Add(flowLayoutPanel1);
Text = this.GetType().Name;
AutoSize = true;
}
[STAThreadAttribute()]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new AutoSizing());
}
private Size startingSize;
private string thirdColumnHeader = "Main Ingredients";
private string boringMeatloaf = "ground beef";
private string boringMeatloafRanking = "*";
private bool boringRecipe;
private bool shortMode;
private string otherRestaurant = "Gomes's Saharan Sushi";
private void InitializeDataGridView(Object ignored,
EventArgs ignoredToo)
{
dataGridView1 = new System.Windows.Forms.DataGridView();
Controls.Add(dataGridView1);
startingSize = new Size(450, 400);
dataGridView1.Size = startingSize;
dataGridView1.AutoSizeRowsModeChanged +=
new DataGridViewAutoSizeModeEventHandler
(WatchRowsModeChanges);
AddLabels();
SetUpColumns();
PopulateRows();
shortMode = false;
boringRecipe = true;
}
private void SetUpColumns()
{
dataGridView1.ColumnCount = 4;
dataGridView1.ColumnHeadersVisible = true;
DataGridViewCellStyle columnHeaderStyle =
new DataGridViewCellStyle();
columnHeaderStyle.BackColor = Color.Aqua;
columnHeaderStyle.Font = new Font("Verdana", 10,
FontStyle.Bold);
dataGridView1.ColumnHeadersDefaultCellStyle =
columnHeaderStyle;
dataGridView1.Columns[0].Name = "Recipe";
dataGridView1.Columns[1].Name = "Category";
dataGridView1.Columns[2].Name = thirdColumnHeader;
dataGridView1.Columns[3].Name = "Rating";
}
private void PopulateRows()
{
string[] row1 = {
"Meatloaf", "Main Dish", boringMeatloaf, boringMeatloafRanking
};
string[] row2 = {
"Key Lime Pie", "Dessert", "lime juice, evaporated milk", "****"
};
string[] row3 = {
"Orange-Salsa Pork Chops", "Main Dish",
"pork chops, salsa, orange juice", "****"
};
string[] row4 = {
"Black Bean and Rice Salad", "Salad",
"black beans, brown rice", "****"
};
string[] row5 = {
"Chocolate Cheesecake", "Dessert", "cream cheese", "***"
};
string[] row6 = {
"Black Bean Dip", "Appetizer", "black beans, sour cream", "***"
};
object[] rows = new object[] {
row1, row2, row3, row4, row5, row6
};
foreach (string[] row in rows)
dataGridView1.Rows.Add(row);
foreach (DataGridViewRow row in dataGridView1.Rows)
{
if (row.IsNewRow) break;
row.HeaderCell.Value = "Restaurant " + row.Index;
}
}
private void AddButton(Button button, string buttonLabel,
EventHandler handler)
{
button.Click += handler;
button.Text = buttonLabel;
button.AutoSize = true;
button.TabIndex = flowLayoutPanel1.Controls.Count;
flowLayoutPanel1.Controls.Add(button);
}
private void ResetToDisorder(Object sender, EventArgs e)
{
Controls.Remove(dataGridView1);
dataGridView1.Dispose();
InitializeDataGridView(null, null);
}
private void ChangeColumn3Header(Object sender, EventArgs e)
{
Toggle(ref shortMode);
if (shortMode) dataGridView1.Columns[2].HeaderText = "S";
else
dataGridView1.Columns[2].HeaderText = thirdColumnHeader;
}
private static Boolean Toggle(ref Boolean toggleThis)
{
toggleThis = !toggleThis;
return toggleThis;
}
private void ChangeMeatloafRecipe(Object sender, EventArgs e)
{
Toggle(ref boringRecipe);
if (boringRecipe)
SetMeatloaf(boringMeatloaf, boringMeatloafRanking);
else
{
string greatMeatloafRecipe = "1 lb. lean ground beef, "
+ "1/2 cup bread crumbs, 1/4 cup ketchup,"
+ "1/3 tsp onion powder, "
+ "1 clove of garlic, 1/2 pack onion soup mix,"
+ " dash of your favorite BBQ Sauce";
SetMeatloaf(greatMeatloafRecipe, "***");
}
}
private void ChangeRestaurant(Object sender, EventArgs ignored)
{
if (dataGridView1.Rows[2].HeaderCell.Value.ToString() ==
otherRestaurant)
dataGridView1.Rows[2].HeaderCell.Value =
"Restaurant 2";
else
dataGridView1.Rows[2].HeaderCell.Value =
otherRestaurant;
}
private void SetMeatloaf(string recipe, string rating)
{
dataGridView1.Rows[0].Cells[2].Value = recipe;
dataGridView1.Rows[0].Cells[3].Value = rating;
}
private string currentLayoutName =
"DataGridView.AutoSizeRowsMode is currently: ";
private void AddLabels()
{
Label current = (Label)
flowLayoutPanel1.Controls[currentLayoutName];
if (current == null)
{
current = new Label();
current.AutoSize = true;
current.Name = currentLayoutName;
current.Text = currentLayoutName +
dataGridView1.AutoSizeRowsMode.ToString();
flowLayoutPanel1.Controls.Add(current);
}
}
#region "Automatic Resizing"
private void AddButtonsForAutomaticResizing()
{
AddButton(button5, "Keep Column Headers Sized",
new EventHandler(ColumnHeadersHeightSizeMode));
AddButton(button6, "Keep Row Headers Sized",
new EventHandler(RowHeadersWidthSizeMode));
AddButton(button7, "Keep Rows Sized",
new EventHandler(AutoSizeRowsMode));
AddButton(button8, "Keep Row Headers Sized with RowsMode",
new EventHandler(AutoSizeRowHeadersUsingAllHeadersMode));
AddButton(button9, "Disable AutoSizeRowsMode",
new EventHandler(DisableAutoSizeRowsMode));
AddButton(button10, "AutoSize third column by rows",
new EventHandler(AutoSizeOneColumn));
AddButton(button11, "AutoSize third column by rows and headers",
new EventHandler(AutoSizeOneColumnIncludingHeaders));
}
private void ColumnHeadersHeightSizeMode(Object sender, EventArgs e)
{
dataGridView1.ColumnHeadersHeightSizeMode =
DataGridViewColumnHeadersHeightSizeMode.AutoSize;
}
private void RowHeadersWidthSizeMode(Object sender, EventArgs e)
{
dataGridView1.RowHeadersWidthSizeMode =
DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
}
private void AutoSizeRowsMode(Object sender, EventArgs es)
{
dataGridView1.AutoSizeRowsMode =
DataGridViewAutoSizeRowsMode.AllCells;
}
private void AutoSizeRowHeadersUsingAllHeadersMode(
Object sender, System.EventArgs e)
{
dataGridView1.AutoSizeRowsMode =
DataGridViewAutoSizeRowsMode.AllHeaders;
}
private void WatchRowsModeChanges(object sender,
DataGridViewAutoSizeModeEventArgs modeEvent)
{
Label label =
(Label)flowLayoutPanel1.Controls[currentLayoutName];
if (modeEvent.PreviousModeAutoSized)
{
label.Text = "changed to a different " +
label.Name +
dataGridView1.AutoSizeRowsMode.ToString();
}
else
{
label.Text = label.Name +
dataGridView1.AutoSizeRowsMode.ToString();
}
}
private void DisableAutoSizeRowsMode(object sender,
EventArgs modeEvent)
{
dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None;
}
private void AutoSizeOneColumn(object sender,
EventArgs theEvent)
{
DataGridViewColumn column = dataGridView1.Columns[2];
column.AutoSizeMode =
DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader;
}
private void AutoSizeOneColumnIncludingHeaders(
object sender, EventArgs theEvent)
{
DataGridViewColumn column = dataGridView1.Columns[2];
column.AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
}
#endregion
}
#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;
public ref class AutoSizing: public System::Windows::Forms::Form
{
private:
FlowLayoutPanel^ flowLayoutPanel1;
Button^ button1;
Button^ button2;
Button^ button3;
Button^ button4;
Button^ button5;
Button^ button6;
Button^ button7;
Button^ button8;
Button^ button9;
Button^ button10;
Button^ button11;
public:
AutoSizing()
{
button1 = gcnew Button;
button2 = gcnew Button;
button3 = gcnew Button;
button4 = gcnew Button;
button5 = gcnew Button;
button6 = gcnew Button;
button7 = gcnew Button;
button8 = gcnew Button;
button9 = gcnew Button;
button10 = gcnew Button;
button11 = gcnew Button;
thirdColumnHeader = "Main Ingredients";
boringMeatloaf = "ground beef";
boringMeatloafRanking = "*";
otherRestaurant = "Gomes's Saharan Sushi";
currentLayoutName = "DataGridView.AutoSizeRowsMode is currently: ";
InitializeComponent();
this->Load += gcnew EventHandler( this, &AutoSizing::InitializeDataGridView );
AddDirections();
AddButton( button1, "Reset", gcnew EventHandler( this, &AutoSizing::ResetToDisorder ) );
AddButton( button2, "Change Column 3 Header", gcnew EventHandler( this, &AutoSizing::ChangeColumn3Header ) );
AddButton( button3, "Change Meatloaf Recipe", gcnew EventHandler( this, &AutoSizing::ChangeMeatloafRecipe ) );
AddButton( button4, "Change Restaurant 2", gcnew EventHandler( this, &AutoSizing::ChangeRestaurant ) );
AddButtonsForAutomaticResizing();
}
private:
void AddDirections()
{
Label^ directions = gcnew Label;
directions->AutoSize = true;
String^ newLine = Environment::NewLine;
directions->Text = String::Format( "Press the buttons that start {0}with 'Change' to see how different sizing {1}modes deal with content changes.", newLine, newLine );
flowLayoutPanel1->Controls->Add( directions );
}
void InitializeComponent()
{
flowLayoutPanel1 = gcnew FlowLayoutPanel;
flowLayoutPanel1->FlowDirection = FlowDirection::TopDown;
flowLayoutPanel1->Location = System::Drawing::Point( 492, 0 );
flowLayoutPanel1->AutoSize = true;
flowLayoutPanel1->TabIndex = 1;
ClientSize = System::Drawing::Size( 674, 419 );
Controls->Add( flowLayoutPanel1 );
Text = this->GetType()->Name;
AutoSize = true;
}
System::Drawing::Size startingSize;
String^ thirdColumnHeader;
String^ boringMeatloaf;
String^ boringMeatloafRanking;
bool boringRecipe;
bool shortMode;
DataGridView^ dataGridView1;
String^ otherRestaurant;
void InitializeDataGridView( Object^ /*ignored*/, EventArgs^ /*ignoredToo*/ )
{
dataGridView1 = gcnew System::Windows::Forms::DataGridView;
Controls->Add( dataGridView1 );
startingSize = System::Drawing::Size( 450, 400 );
dataGridView1->Size = startingSize;
dataGridView1->AutoSizeRowsModeChanged += gcnew DataGridViewAutoSizeModeEventHandler( this, &AutoSizing::WatchRowsModeChanges );
AddLabels();
SetUpColumns();
PopulateRows();
shortMode = false;
boringRecipe = true;
}
void SetUpColumns()
{
dataGridView1->ColumnCount = 4;
dataGridView1->ColumnHeadersVisible = true;
DataGridViewCellStyle ^ columnHeaderStyle = gcnew DataGridViewCellStyle;
columnHeaderStyle->BackColor = Color::Aqua;
columnHeaderStyle->Font = gcnew System::Drawing::Font( "Verdana",10,FontStyle::Bold );
dataGridView1->ColumnHeadersDefaultCellStyle = columnHeaderStyle;
dataGridView1->Columns[ 0 ]->Name = "Recipe";
dataGridView1->Columns[ 1 ]->Name = "Category";
dataGridView1->Columns[ 2 ]->Name = thirdColumnHeader;
dataGridView1->Columns[ 3 ]->Name = "Rating";
}
void PopulateRows()
{
array<String^>^row1 = {"Meatloaf","Main Dish",boringMeatloaf,boringMeatloafRanking};
array<String^>^row2 = {"Key Lime Pie","Dessert","lime juice, evaporated milk","****"};
array<String^>^row3 = {"Orange-Salsa Pork Chops","Main Dish","pork chops, salsa, orange juice","****"};
array<String^>^row4 = {"Black Bean and Rice Salad","Salad","black beans, brown rice","****"};
array<String^>^row5 = {"Chocolate Cheesecake","Dessert","cream cheese","***"};
array<String^>^row6 = {"Black Bean Dip","Appetizer","black beans, sour cream","***"};
array<Object^>^rows = {row1,row2,row3,row4,row5,row6};
IEnumerator^ myEnum = rows->GetEnumerator();
while ( myEnum->MoveNext() )
{
array<String^>^row = safe_cast<array<String^>^>(myEnum->Current);
dataGridView1->Rows->Add( row );
}
IEnumerator^ myEnum1 = safe_cast<IEnumerable^>(dataGridView1->Rows)->GetEnumerator();
while ( myEnum1->MoveNext() )
{
DataGridViewRow ^ row = safe_cast<DataGridViewRow ^>(myEnum1->Current);
if ( row->IsNewRow )
break;
row->HeaderCell->Value = String::Format( "Restaurant {0}", row->Index );
}
}
void AddButton( Button^ button, String^ buttonLabel, EventHandler^ handler )
{
button->Click += handler;
button->Text = buttonLabel;
button->AutoSize = true;
button->TabIndex = flowLayoutPanel1->Controls->Count;
flowLayoutPanel1->Controls->Add( button );
}
void ResetToDisorder( Object^ /*sender*/, EventArgs^ /*e*/ )
{
Controls->Remove( dataGridView1 );
dataGridView1->DataGridView::~DataGridView();
InitializeDataGridView( nullptr, nullptr );
}
void ChangeColumn3Header( Object^ /*sender*/, EventArgs^ /*e*/ )
{
Toggle( &shortMode );
if ( shortMode )
dataGridView1->Columns[ 2 ]->HeaderText = "S";
else
dataGridView1->Columns[ 2 ]->HeaderText = thirdColumnHeader;
}
Boolean Toggle( interior_ptr<Boolean> toggleThis )
{
*toggleThis = ! *toggleThis;
return *toggleThis;
}
void ChangeMeatloafRecipe( Object^ /*sender*/, EventArgs^ /*e*/ )
{
Toggle( &boringRecipe );
if ( boringRecipe )
SetMeatloaf( boringMeatloaf, boringMeatloafRanking );
else
{
String^ greatMeatloafRecipe = "1 lb. lean ground beef, "
"1/2 cup bread crumbs, 1/4 cup ketchup,"
"1/3 tsp onion powder, "
"1 clove of garlic, 1/2 pack onion soup mix,"
" dash of your favorite BBQ Sauce";
SetMeatloaf( greatMeatloafRecipe, "***" );
}
}
void ChangeRestaurant( Object^ /*sender*/, EventArgs^ /*ignored*/ )
{
if ( dataGridView1->Rows[ 2 ]->HeaderCell->Value->ToString()->Equals( otherRestaurant ) )
dataGridView1->Rows[ 2 ]->HeaderCell->Value = "Restaurant 2";
else
dataGridView1->Rows[ 2 ]->HeaderCell->Value = otherRestaurant;
}
void SetMeatloaf( String^ recipe, String^ rating )
{
dataGridView1->Rows[ 0 ]->Cells[ 2 ]->Value = recipe;
dataGridView1->Rows[ 0 ]->Cells[ 3 ]->Value = rating;
}
String^ currentLayoutName;
void AddLabels()
{
Label^ current = dynamic_cast<Label^>(flowLayoutPanel1->Controls[ currentLayoutName ]);
if ( current == nullptr )
{
current = gcnew Label;
current->AutoSize = true;
current->Name = currentLayoutName;
current->Text = String::Concat( currentLayoutName, dataGridView1->AutoSizeRowsMode );
flowLayoutPanel1->Controls->Add( current );
}
}
void AddButtonsForAutomaticResizing()
{
AddButton( button5, "Keep Column Headers Sized", gcnew EventHandler( this, &AutoSizing::ColumnHeadersHeightSizeMode ) );
AddButton( button6, "Keep Row Headers Sized", gcnew EventHandler( this, &AutoSizing::RowHeadersWidthSizeMode ) );
AddButton( button7, "Keep Rows Sized", gcnew EventHandler( this, &AutoSizing::AutoSizeRowsMode ) );
AddButton( button8, "Keep Row Headers Sized with RowsMode", gcnew EventHandler( this, &AutoSizing::AutoSizeRowHeadersUsingAllHeadersMode ) );
AddButton( button9, "Disable AutoSizeRowsMode", gcnew EventHandler( this, &AutoSizing::DisableAutoSizeRowsMode ) );
AddButton( button10, "AutoSize third column by rows", gcnew EventHandler( this, &AutoSizing::AutoSizeOneColumn ) );
AddButton( button11, "AutoSize third column by rows and headers", gcnew EventHandler( this, &AutoSizing::AutoSizeOneColumnIncludingHeaders ) );
}
void ColumnHeadersHeightSizeMode( Object^ /*sender*/, EventArgs^ /*e*/ )
{
dataGridView1->ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode::AutoSize;
}
void RowHeadersWidthSizeMode( Object^ /*sender*/, EventArgs^ /*e*/ )
{
dataGridView1->RowHeadersWidthSizeMode = DataGridViewRowHeadersWidthSizeMode::AutoSizeToAllHeaders;
}
void AutoSizeRowsMode( Object^ /*sender*/, EventArgs^ /*es*/ )
{
dataGridView1->AutoSizeRowsMode = DataGridViewAutoSizeRowsMode::AllCells;
}
void AutoSizeRowHeadersUsingAllHeadersMode( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
dataGridView1->AutoSizeRowsMode = DataGridViewAutoSizeRowsMode::AllHeaders;
}
void WatchRowsModeChanges( Object^ /*sender*/, DataGridViewAutoSizeModeEventArgs^ modeEvent )
{
Label^ label = dynamic_cast<Label^>(flowLayoutPanel1->Controls[ currentLayoutName ]);
if ( modeEvent->PreviousModeAutoSized )
{
label->Text = String::Format( "changed to a different {0}{1}", label->Name, dataGridView1->AutoSizeRowsMode );
}
else
{
label->Text = String::Concat( label->Name, dataGridView1->AutoSizeRowsMode );
}
}
void DisableAutoSizeRowsMode( Object^ /*sender*/, EventArgs^ /*modeEvent*/ )
{
dataGridView1->AutoSizeRowsMode = DataGridViewAutoSizeRowsMode::None;
}
void AutoSizeOneColumn( Object^ /*sender*/, EventArgs^ /*theEvent*/ )
{
DataGridViewColumn^ column = dataGridView1->Columns[ 2 ];
column->AutoSizeMode = DataGridViewAutoSizeColumnMode::DisplayedCellsExceptHeader;
}
void AutoSizeOneColumnIncludingHeaders( Object^ /*sender*/, EventArgs^ /*theEvent*/ )
{
DataGridViewColumn^ column = dataGridView1->Columns[ 2 ];
column->AutoSizeMode = DataGridViewAutoSizeColumnMode::AllCells;
}
};
[STAThread]
int main()
{
Application::EnableVisualStyles();
Application::Run( gcnew AutoSizing );
}
Compilando o código
Este exemplo requer:
- Referências para as montagens (assemblys) do System, System.Drawing e System.Windows.Forms.
Para obter informações sobre como criar este exemplo a partir da linha de comando para Visual Basic ou Visual C#, consulte Compilando a partir da linha de comando (Visual Basic) ou Comando -<>>linha criando com CSC. exe. Você também pode construir este exemplo no Visual Studio colando o código em um novo projeto. Para obter mais informações, consulte Como: Compilar e executar um exemplo de código Windows Forms concluída usando Visual Studio e Como: Compilar e executar um exemplo de código Windows Forms concluída usando Visual Studio e Como: Compilar e executar um exemplo de código Windows Forms concluída usando Visual Studio e Como: Compilar e executar um exemplo de código de formulários Windows concluída usando o Visual Studio e Como: Compilar e executar um exemplo de código de formulários de Windows completa usando Visual Studio e Como compilar e executar um exemplo de código dos Windows Forms concluído usando Visual Studio.
Consulte também
Tarefas
Referência
DataGridView.ColumnHeadersHeightSizeMode
DataGridView.RowHeadersWidthSizeMode
DataGridView.AutoSizeColumnsMode
DataGridViewColumn.AutoSizeMode
DataGridViewColumn.InheritedAutoSizeMode
DataGridViewAutoSizeColumnMode
DataGridViewAutoSizeColumnsMode
DataGridViewColumnHeadersHeightSizeMode
DataGridViewRowHeadersWidthSizeMode
Conceitos
Opções de controle do Windows Forms DataGridView de dimensionamento.
Outros recursos
Redimensionamento de colunas e linhas em que o controle DataGridView do Windows Forms