DataGridViewComboBoxColumn.DropDownWidth プロパティ
定義
重要
一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。
コンボ ボックスのドロップダウン リストの幅を取得または設定します。
public:
property int DropDownWidth { int get(); void set(int value); };public int DropDownWidth { get; set; }member this.DropDownWidth : int with get, setPublic Property DropDownWidth As Integerプロパティ値
ドロップダウン リストの幅 (ピクセル単位)。 既定値は 1 です。
例外
CellTemplate プロパティの値が null です。
例
次のコード例では、a を使用 DataGridViewComboBoxColumn して列にデータを入力する方法を TitleOfCourtesy 示します。 この例は、クラスの概要トピックで使用できるより大きな例の DataGridViewComboBoxColumn 一部です。
private:
DataGridViewComboBoxColumn^ CreateComboBoxColumn()
{
DataGridViewComboBoxColumn^ column =
gcnew DataGridViewComboBoxColumn();
{
column->DataPropertyName = ColumnName::TitleOfCourtesy.ToString();
column->HeaderText = ColumnName::TitleOfCourtesy.ToString();
column->DropDownWidth = 160;
column->Width = 90;
column->MaxDropDownItems = 3;
column->FlatStyle = FlatStyle::Flat;
}
return column;
}
private:
void SetAlternateChoicesUsingDataSource(DataGridViewComboBoxColumn^ comboboxColumn)
{
{
comboboxColumn->DataSource = RetrieveAlternativeTitles();
comboboxColumn->ValueMember = ColumnName::TitleOfCourtesy.ToString();
comboboxColumn->DisplayMember = comboboxColumn->ValueMember;
}
}
private:
DataTable^ RetrieveAlternativeTitles()
{
return Populate("SELECT distinct TitleOfCourtesy FROM Employees");
}
String^ connectionString;
private:
DataTable^ Populate(String^ sqlCommand)
{
SqlConnection^ northwindConnection = gcnew SqlConnection(connectionString);
northwindConnection->Open();
SqlCommand^ command = gcnew SqlCommand(sqlCommand, northwindConnection);
SqlDataAdapter^ adapter = gcnew SqlDataAdapter();
adapter->SelectCommand = command;
DataTable^ table = gcnew DataTable();
adapter->Fill(table);
return table;
}
// Using an enum provides some abstraction between column index
// and column name along with compile time checking, and gives
// a handy place to store the column names.
enum class ColumnName
{
EmployeeID,
LastName,
FirstName,
Title,
TitleOfCourtesy,
BirthDate,
HireDate,
Address,
City,
Region,
PostalCode,
Country,
HomePhone,
Extension,
Photo,
Notes,
ReportsTo,
PhotoPath,
OutOfOffice
};
private DataGridViewComboBoxColumn CreateComboBoxColumn()
{
DataGridViewComboBoxColumn column =
new DataGridViewComboBoxColumn();
{
column.DataPropertyName = ColumnName.TitleOfCourtesy.ToString();
column.HeaderText = ColumnName.TitleOfCourtesy.ToString();
column.DropDownWidth = 160;
column.Width = 90;
column.MaxDropDownItems = 3;
column.FlatStyle = FlatStyle.Flat;
}
return column;
}
private void SetAlternateChoicesUsingDataSource(DataGridViewComboBoxColumn comboboxColumn)
{
{
comboboxColumn.DataSource = RetrieveAlternativeTitles();
comboboxColumn.ValueMember = ColumnName.TitleOfCourtesy.ToString();
comboboxColumn.DisplayMember = comboboxColumn.ValueMember;
}
}
private DataTable RetrieveAlternativeTitles()
{
return Populate("SELECT distinct TitleOfCourtesy FROM Employees");
}
string connectionString =
"Integrated Security=SSPI;Persist Security Info=False;" +
"Initial Catalog=Northwind;Data Source=localhost";
private DataTable Populate(string sqlCommand)
{
SqlConnection northwindConnection = new SqlConnection(connectionString);
northwindConnection.Open();
SqlCommand command = new SqlCommand(sqlCommand, northwindConnection);
SqlDataAdapter adapter = new SqlDataAdapter();
adapter.SelectCommand = command;
DataTable table = new DataTable();
table.Locale = System.Globalization.CultureInfo.InvariantCulture;
adapter.Fill(table);
return table;
}
// Using an enum provides some abstraction between column index
// and column name along with compile time checking, and gives
// a handy place to store the column names.
enum ColumnName
{
EmployeeId,
LastName,
FirstName,
Title,
TitleOfCourtesy,
BirthDate,
HireDate,
Address,
City,
Region,
PostalCode,
Country,
HomePhone,
Extension,
Photo,
Notes,
ReportsTo,
PhotoPath,
OutOfOffice
};
Private Function CreateComboBoxColumn() _
As DataGridViewComboBoxColumn
Dim column As New DataGridViewComboBoxColumn()
With column
.DataPropertyName = ColumnName.TitleOfCourtesy.ToString()
.HeaderText = ColumnName.TitleOfCourtesy.ToString()
.DropDownWidth = 160
.Width = 90
.MaxDropDownItems = 3
.FlatStyle = FlatStyle.Flat
End With
Return column
End Function
Private Sub SetAlternateChoicesUsingDataSource( _
ByVal comboboxColumn As DataGridViewComboBoxColumn)
With comboboxColumn
.DataSource = RetrieveAlternativeTitles()
.ValueMember = ColumnName.TitleOfCourtesy.ToString()
.DisplayMember = .ValueMember
End With
End Sub
Private Function RetrieveAlternativeTitles() As DataTable
Return Populate( _
"SELECT distinct TitleOfCourtesy FROM Employees")
End Function
Private connectionString As String = _
"Integrated Security=SSPI;Persist Security Info=False;" _
& "Initial Catalog=Northwind;Data Source=localhost"
Private Function Populate(ByVal sqlCommand As String) As DataTable
Dim northwindConnection As New SqlConnection(connectionString)
northwindConnection.Open()
Dim command As New SqlCommand(sqlCommand, _
northwindConnection)
Dim adapter As New SqlDataAdapter()
adapter.SelectCommand = command
Dim table As New DataTable()
table.Locale = System.Globalization.CultureInfo.InvariantCulture
adapter.Fill(table)
Return table
End Function
' Using an enum provides some abstraction between column index
' and column name along with compile time checking, and gives
' a handy place to store the column names.
Enum ColumnName
EmployeeId
LastName
FirstName
Title
TitleOfCourtesy
BirthDate
HireDate
Address
City
Region
PostalCode
Country
HomePhone
Extension
Photo
Notes
ReportsTo
PhotoPath
OutOfOffice
End Enum
注釈
このプロパティは、メンバーの DataGridViewComboBoxCell.DropDownWidth プロパティに CellTemplate 対応します。
このプロパティの取得または設定は、プロパティによって返されるオブジェクトのプロパティをCellTemplate取得または設定DropDownWidthします。 このプロパティを設定すると、 DropDownWidth 列内のすべてのセルのプロパティも設定されます。 個々のセルに対して指定した値をオーバーライドするには、列の値を設定した後でセル値を設定します。