CssStyleCollection.Count Property

Reference

Definition

Namespace:: System.Web.UI

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the number of items in the CssStyleCollection object.

public:
 property int Count { int get(); };

public int Count { get; }

member this.Count : int

Public ReadOnly Property Count As Integer

Property Value

Int32

The number of items in the CssStyleCollection object.

Examples

The following example creates a CountStyleFunc function that obtains the current value of the Count property for an HtmlInputText server control and displays it to an ASP.NET page.

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  protected void Page_Load(object sender, EventArgs e)
  {
    if (!IsPostBack)
      CountStyleFunc(sender, e);
  }
  protected void CountStyleFunc(object sender, EventArgs e)
  {
    int styleCount;
    // Get the StylesCollection Count.
    styleCount = mytextBox.Style.Count;
    Response.Write("<br /> CssStyleCollection Count  " + styleCount);
  }
  protected void AddBtn_Click(Object Src, EventArgs e)
  {
    // Add style to textbox.
    mytextBox.Style["background-color"] = "green";
    CountStyleFunc(Src, e);
  }
  protected void ClearButton_Click(Object Src, EventArgs e)
  {
    mytextBox.Style.Clear();
    CountStyleFunc(Src, e);
  }
  protected void RemoveButton_Click(Object Src, EventArgs e)
  {
    mytextBox.Style.Remove("background-color");
    CountStyleFunc(Src, e);
  }

  protected void ShowButton_Click(Object Src, EventArgs e)
  {
    DataTable dt = new DataTable();
    DataRow dr;
    dt.Columns.Add(new DataColumn("AttributeName", typeof(String)));
    dt.Columns.Add(new DataColumn("AttributeValue", typeof(String)));

    // Get the styles collection.
    foreach (object styleKey in mytextBox.Style.Keys)
    {
      dr = dt.NewRow();
      dr[0] = (string)styleKey;
      dr[1] = mytextBox.Style[(string)styleKey];
      dt.Rows.Add(dr);
    }
    DataView dv = new DataView(dt);
    DataList1.DataSource = dv;
    DataList1.DataBind();
    
  }
    </script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>CssStyleCollection Example</title>
</head>
   <body>
      <form id="CSSForm" runat="server">
        <div>
         <input type="text"
                id="mytextBox"
                style="color:black;font: 12pt arial;" 
                runat="server" 
                name="mytextBox"/>
         <br /> <br />
         <input type="Button"
                id="addBtn"
                value="AddStyle"
                onserverclick="AddBtn_Click"
                runat="server" 
                name="addBtn"/>
         <input type="Button" 
                id="removeBtn" 
                value="RemoveStyle" 
                onserverclick="RemoveButton_Click" 
                runat="server"
                name="removeBtn"/>
         <input type="Button" 
                id="clearBtn"
                value="ClearStyle" 
                onserverclick="ClearButton_Click" 
                runat="server" 
                name="clearBtn"/>
         <input type="Button" 
                id="showBtn"
                value="ShowAllStyles" 
                onserverclick="ShowButton_Click" 
                runat="server"
                name="showBtn"/>
         <asp:DataList id="DataList1"
                       runat="server">
           <HeaderStyle Font-Bold="true"/>
           <HeaderTemplate>
              CssStyleCollection
           </HeaderTemplate>
           <ItemTemplate>
             Attribute: 
             <%# DataBinder.Eval(Container.DataItem, "AttributeName") %>
             , 
             Value: 
             <%# DataBinder.Eval(Container.DataItem, "AttributeValue") %>
           </ItemTemplate>
         </asp:DataList>
        </div>
      </form>
   </body>
</html>

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Data" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Not IsPostBack Then
      CountStyleFunc(sender, e)
    End If
  End Sub

  Protected Sub CountStyleFunc(ByVal sender As Object, ByVal e As EventArgs)
    Dim styleCount As Integer
    ' Get the StylesCollection Count.
    styleCount = mytextBox.Style.Count
    Response.Write("<br /> CssStyleCollection Count  " & styleCount)
  End Sub


  Protected Sub AddBtn_Click(ByVal Src As Object, ByVal e As EventArgs)
    ' Add style to textbox.
    mytextBox.Style("background-color") = "green"
    CountStyleFunc(Src, e)
  End Sub

  Protected Sub ClearButton_Click(ByVal Src As Object, ByVal e As EventArgs)
    mytextBox.Style.Clear()
    CountStyleFunc(Src, e)
  End Sub

  Protected Sub RemoveButton_Click(ByVal Src As Object, ByVal e As EventArgs)
    mytextBox.Style.Remove("background-color")
    CountStyleFunc(Src, e)
  End Sub

  Protected Sub ShowButton_Click(ByVal Src As Object, ByVal e As EventArgs)
    
    Dim dt As New DataTable()
    Dim dr As DataRow
    dt.Columns.Add(New DataColumn("AttributeName", GetType(String)))
    dt.Columns.Add(New DataColumn("AttributeValue", GetType(String)))

    ' Get the styles collection.
    Dim styleKey As Object
    For Each styleKey In mytextBox.Style.Keys
      
      dr = dt.NewRow()
      dr(0) = CStr(styleKey)
      dr(1) = mytextBox.Style(CStr(styleKey))
      dt.Rows.Add(dr)

    Next styleKey
    Dim dv As New DataView(dt)
    DataList1.DataSource = dv
    DataList1.DataBind()

  End Sub
   </script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>CssStyleCollection Example</title>
</head>
   <body>
      <form id="CSSForm" runat="server">
        <div>
         <input type="text"
                id="mytextBox"
                style="color:black;font: 12pt arial;" 
                runat="server" 
                name="mytextBox"/>
         <br /> <br />
         <input type="Button"
                id="addBtn"
                value="AddStyle"
                onserverclick="AddBtn_Click"
                runat="server" 
                name="addBtn"/>
         <input type="Button" 
                id="removeBtn" 
                value="RemoveStyle" 
                onserverclick="RemoveButton_Click" 
                runat="server"
                name="removeBtn"/>
         <input type="Button" 
                id="clearBtn"
                value="ClearStyle" 
                onserverclick="ClearButton_Click" 
                runat="server" 
                name="clearBtn"/>
         <input type="Button" 
                id="showBtn"
                value="ShowAllStyles" 
                onserverclick="ShowButton_Click" 
                runat="server"
                name="showBtn"/>
         <asp:DataList id="DataList1"
                       runat="server">
           <HeaderStyle Font-Bold="true"/>
           <HeaderTemplate>
              CssStyleCollection
           </HeaderTemplate>
           <ItemTemplate>
             Attribute: 
             <%# DataBinder.Eval(Container.DataItem, "AttributeName") %>
             , 
             Value: 
             <%# DataBinder.Eval(Container.DataItem, "AttributeValue") %>
           </ItemTemplate>
         </asp:DataList>
        </div>
      </form>
   </body>
</html>

Applies to

Delen via

CssStyleCollection.Count Property

Definition

Property Value

Examples

Applies to

See also

Aanvullende resources