CssStyleCollection.Count-Eigenschaft

Artikel
08/20/2007

Ruft die Anzahl der Elemente im CssStyleCollection-Objekt ab.

Namespace: System.Web.UI
Assembly: System.Web (in system.web.dll)

Syntax

'Declaration
Public ReadOnly Property Count As Integer
'Usage
Dim instance As CssStyleCollection
Dim value As Integer

value = instance.Count

public int Count { get; }

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

/** @property */
public int get_Count ()

public function get Count () : int

Eigenschaftenwert

Die Anzahl der Elemente im CssStyleCollection-Objekt.

Beispiel

Im folgenden Beispiel wird eine CountStyleFunc-Funktion, die den aktuellen Wert der Count-Eigenschaft für ein HtmlInputText-Serversteuerelement abruft, erstellt und auf einer ASP.NET-Seite angezeigt.

<%@ 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>

<%@ 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>

Plattformen

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

CssStyleCollection-Klasse
CssStyleCollection-Member
System.Web.UI-Namespace
Style

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