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DataListCommandEventArgs.CommandSource Özellik

  • Başvuru

Tanım

Ad Alanı:
System.Web.UI.WebControls
Bütünleştirilmiş Kod:
System.Web.dll

Komutun kaynağını alır.

public:
 property System::Object ^ CommandSource { System::Object ^ get(); };
public object CommandSource { get; }
member this.CommandSource : obj
Public ReadOnly Property CommandSource As Object

Özellik Değeri

Object

Komutun kaynağı.

Örnekler

Aşağıdaki örnekte, kullanıcı tarafından seçilen komutu belirlemek için özelliğinin nasıl kullanılacağı CommandSource gösterilmektedir. Ardından, komutuna göre uygun eylemi gerçekleştirir.

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>DataListCommandEventArgs Example</title>
<script language="c#" runat="server">
 
      ICollection CreateDataSource() 
      {
         
         DataTable dt = new DataTable();
         DataRow dr;
 
         // Create a DataTable.
         dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
         dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
         dt.Columns.Add(new DataColumn("DateTimeValue", typeof(DateTime)));
 
         // Create sample data.
         for (int i = 1; i <= 9; i++) 
         {
            dr = dt.NewRow();
            dr[0] = i;
            dr[1] = "Item " + i.ToString();
            dr[2] = DateTime.Now.ToShortTimeString();
            dt.Rows.Add(dr);
         }
          
 
         // Return a DataView to the DataTable.
         DataView dv = new DataView(dt);
         return dv;
         
      }
 
      void Page_Load(Object sender, EventArgs e) 
      {
         
         if (!IsPostBack)
            BindList();
 
      }
 
      void BindList() 
      {

         DataList1.DataSource = CreateDataSource();
         DataList1.DataBind();

      }
     
      void DataList_ItemCommand(object sender, DataListCommandEventArgs e) 
      {          
         if (((LinkButton)e.CommandSource).CommandName == "select")
            DataList1.SelectedIndex = e.Item.ItemIndex;
         
         BindList();
      }
 
   </script>
 
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataListCommandEventArgs Example</h3>
 
      <asp:DataList id="DataList1"                                                
                    GridLines="Both"                                                       
                    OnItemCommand="DataList_ItemCommand"
                    runat="server">

         <HeaderTemplate>
            Items
         </HeaderTemplate>

         <ItemTemplate>
            <asp:LinkButton id="button1"
                            Text="Show details" 
                            CommandName="select" 
                            runat="server"/>
            <%# DataBinder.Eval(Container.DataItem, "StringValue") %>
         </ItemTemplate>

         <SelectedItemTemplate>
            Item:
            <%# DataBinder.Eval(Container.DataItem, "StringValue") %>
            <br />
            Order Date:
            <%# DataBinder.Eval(Container.DataItem, "DateTimeValue", "{0:d}") %>
            <br />
            Quantity:
            <%# DataBinder.Eval(Container.DataItem, "IntegerValue", "{0:N1}") %>
            <br />
         </SelectedItemTemplate>
 
      </asp:DataList>

   </form>
 
</body>
</html>

<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>DataListCommandEventArgs Example</title>
<script language="VB" runat="server">
 
    Function CreateDataSource() As ICollection
        
        Dim dt As New DataTable()
        Dim dr As DataRow
        
        ' Create a DataTable.
        dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
        dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
        dt.Columns.Add(New DataColumn("DateTimeValue", GetType(DateTime)))
        
        ' Create sample data.
        Dim i As Integer
        For i = 1 To 9
            dr = dt.NewRow()
            dr(0) = i
            dr(1) = "Item " & i.ToString()
            dr(2) = DateTime.Now.ToShortTimeString()
            dt.Rows.Add(dr)
        Next i
        
        
        ' Return a DataView to the DataTable.
        Dim dv As New DataView(dt)
        Return dv
    End Function 'CreateDataSource
     

    Sub Page_Load(sender As Object, e As EventArgs)
        
        If Not IsPostBack Then
            BindList()
        End If 
    End Sub 'Page_Load


    Sub BindList()
        
        DataList1.DataSource = CreateDataSource()
        DataList1.DataBind()
    End Sub 'BindList
     

    Sub DataList_ItemCommand(sender As Object, e As DataListCommandEventArgs)
        If CType(e.CommandSource, LinkButton).CommandName = "select" Then
            DataList1.SelectedIndex = e.Item.ItemIndex
        End If 
        BindList()
    End Sub 'DataList_ItemCommand
     
   </script>
 
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataListCommandEventArgs Example</h3>
 
      <asp:DataList id="DataList1"                                                
                    GridLines="Both"                                                       
                    OnItemCommand="DataList_ItemCommand"
                    runat="server">

         <HeaderTemplate>
            Items
         </HeaderTemplate>

         <ItemTemplate>
            <asp:LinkButton id="button1"
                            Text="Show details" 
                            CommandName="select" 
                            runat="server"/>
            <%# DataBinder.Eval(Container.DataItem, "StringValue") %>
         </ItemTemplate>

         <SelectedItemTemplate>
            Item:
            <%# DataBinder.Eval(Container.DataItem, "StringValue") %>
            <br />
            Order Date:
            <%# DataBinder.Eval(Container.DataItem, "DateTimeValue", "{0:d}") %>
            <br />
            Quantity:
            <%# DataBinder.Eval(Container.DataItem, "IntegerValue", "{0:N1}") %>
            <br />
         </SelectedItemTemplate>
 
      </asp:DataList>

   </form>
 
</body>
</html>

Açıklamalar

CommandSource olayı tetikleyen komut kaynağını belirlemek için özelliğini kullanın. Bu özellik genellikle olayı hangi komutun tetiklediğini belirlemek için kullanılır. Ardından komutuna göre uygun eylemi gerçekleştirebilirsiniz.

Şunlara uygulanır

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