GridView.OnRowCreated(GridViewRowEventArgs) Yöntem

  • Başvuru

Tanım

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

Olayı tetikler RowCreated .

protected:
 virtual void OnRowCreated(System::Web::UI::WebControls::GridViewRowEventArgs ^ e);
protected virtual void OnRowCreated (System.Web.UI.WebControls.GridViewRowEventArgs e);
abstract member OnRowCreated : System.Web.UI.WebControls.GridViewRowEventArgs -> unit
override this.OnRowCreated : System.Web.UI.WebControls.GridViewRowEventArgs -> unit
Protected Overridable Sub OnRowCreated (e As GridViewRowEventArgs)

Parametreler

e
GridViewRowEventArgs

GridViewRowEventArgs Olay verilerini içeren bir.

Örnekler

Aşağıdaki örnekte, olay için bir olay işleme yönteminin nasıl sağ olduğu gösterilmektedir RowCreated . Bir satır oluşturulduğunda, dizini yeni satırda CommandArgument yer alan bir LinkButton denetimin özelliğinde depolanır. Bu, kullanıcı komut düğmesine tıkladığında satırın dizinini belirlemenizi sağlar.

<%@ Page language="C#" %>

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

  void ProductsGridView_RowCommand(Object sender, GridViewCommandEventArgs e)
  {
    // If multiple buttons are used in a GridView control, use the
    // CommandName property to determine which button was clicked.
    if(e.CommandName=="Add")
    {
      // Convert the row index stored in the CommandArgument
      // property to an Integer.
      int index = Convert.ToInt32(e.CommandArgument);

      // Retrieve the row that contains the button clicked 
      // by the user from the Rows collection.
      GridViewRow row = ProductsGridView.Rows[index];

      // Create a new ListItem object for the product in the row.     
      ListItem item = new ListItem();
      item.Text = Server.HtmlDecode(row.Cells[1].Text);

      // If the product is not already in the ListBox, add the ListItem 
      // object to the Items collection of the ListBox control. 
      if (!ProductsListBox.Items.Contains(item))
      {
        ProductsListBox.Items.Add(item);
      }
    }
  }

  void ProductsGridView_RowCreated(Object sender, GridViewRowEventArgs e)
  {

    // The GridViewCommandEventArgs class does not contain a 
    // property that indicates which row's command button was
    // clicked. To identify which row's button was clicked, use 
    // the button's CommandArgument property by setting it to the 
    // row's index.
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
      // Retrieve the LinkButton control from the first column.
      LinkButton addButton = (LinkButton)e.Row.FindControl("AddButton");

      // Set the LinkButton's CommandArgument property with the
      // row's index.
      addButton.CommandArgument = e.Row.RowIndex.ToString();
    }

  }

</script>

<html>
  <head id="Head1" runat="server">
    <title>GridView RowCreated Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>GridView RowCreated Example</h3>

      <table width="100%">         
        <tr>                
          <td style="width:50%">

            <asp:GridView ID="ProductsGridView" 
              DataSourceID="ProductsDataSource"
              AllowPaging="true" 
              AutoGenerateColumns="false"
              OnRowCommand="ProductsGridView_RowCommand"
              OnRowCreated="ProductsGridView_RowCreated"  
              runat="server">
              <Columns>
                <asp:TemplateField>
                  <ItemTemplate>
                    <asp:LinkButton runat="server"
                      ID="AddButton"
                      CommandName="Add"
                      Text="Add" />
                  </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="Name" 
                  HeaderText="Product Name"/> 
                <asp:BoundField DataField="ProductNumber" 
                  HeaderText="Product Number"/>
              </Columns>

            </asp:GridView>

          </td>

          <td style="vertical-align:top; width:50%">

            Products: <br/>
            <asp:listbox id="ProductsListBox"
              runat="server" Height="200px" Width="200px"/> 

          </td>
        </tr>
      </table>

      <!-- This example uses Microsoft SQL Server and connects    -->
      <!-- to the AdventureWorks sample database. Use an ASP.NET  -->
      <!-- expression to retrieve the connection string value     -->
      <!-- from the Web.config file.                              -->
      <asp:sqldatasource id="ProductsDataSource"
        selectcommand="Select [Name], [ProductNumber] From Production.Product"
        connectionstring="<%$ ConnectionStrings:AdventureWorks_DataConnectionString%>" 
        runat="server"/>

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

<%@ Page language="VB" %>

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

  Sub ProductsGridView_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)

    ' If multiple buttons are used in a GridView control, use the
    ' CommandName property to determine which button was clicked.
    If e.CommandName = "Add" Then

      ' Convert the row index stored in the CommandArgument
      ' property to an Integer.
      Dim index As Integer = Convert.ToInt32(e.CommandArgument)

      ' Retrieve the row that contains the button clicked 
      ' by the user from the Rows collection.
      Dim row As GridViewRow = ProductsGridView.Rows(index)

      ' Create a new ListItem object for the product in the row.     
      Dim item As New ListItem()
      item.Text = Server.HtmlDecode(row.Cells(1).Text)

      ' If the product is not already in the ListBox, add the ListItem 
      ' object to the Items collection of the ListBox control. 
      If Not ProductsListBox.Items.Contains(item) Then

        ProductsListBox.Items.Add(item)

      End If

    End If

  End Sub

  Sub ProductsGridView_RowCreated(ByVal sender As Object, ByVal e As GridViewRowEventArgs)

    ' The GridViewCommandEventArgs class does not contain a 
    ' property that indicates which row's command button was
    ' clicked. To identify which row's button was clicked, use 
    ' the button's CommandArgument property by setting it to the 
    ' row's index.
    If e.Row.RowType = DataControlRowType.DataRow Then

      ' Retrieve the LinkButton control from the first column.
      Dim addButton As LinkButton = CType(e.Row.FindControl("AddButton"), LinkButton)

      ' Set the LinkButton's CommandArgument property with the
      ' row's index.
      addButton.CommandArgument = e.Row.RowIndex.ToString()

    End If

  End Sub

</script>

<html>
  <head id="Head1" runat="server">
    <title>GridView RowCreated Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>GridView RowCreated Example</h3>

      <table width="100%">         
        <tr>                
          <td style="width:50%">

            <asp:GridView ID="ProductsGridView" 
              DataSourceID="ProductsDataSource"
              AllowPaging="true" 
              AutoGenerateColumns="false"
              OnRowCommand="ProductsGridView_RowCommand"
              OnRowCreated="ProductsGridView_RowCreated"  
              runat="server">
              <Columns>
                <asp:TemplateField>
                  <ItemTemplate>
                    <asp:LinkButton runat="server"
                      ID="AddButton"
                      CommandName="Add"
                      Text="Add" />
                  </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="Name" 
                  HeaderText="Product Name"/> 
                <asp:BoundField DataField="ProductNumber" 
                  HeaderText="Product Number"/>
              </Columns>

            </asp:GridView>

          </td>

          <td style="vertical-align:top; width:50%">

            Products: <br/>
            <asp:listbox id="ProductsListBox"
              runat="server" Height="200px" Width="200px"/> 

          </td>
        </tr>
      </table>

      <!-- This example uses Microsoft SQL Server and connects    -->
      <!-- to the AdventureWorks sample database. Use an ASP.NET  -->
      <!-- expression to retrieve the connection string value     -->
      <!-- from the Web.config file.                              -->
      <asp:sqldatasource id="ProductsDataSource"
        selectcommand="Select [Name], [ProductNumber] From Production.Product"
        connectionstring="<%$ ConnectionStrings:AdventureWorks_DataConnectionString%>" 
        runat="server"/>

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

Açıklamalar

Denetimin işlenebilmesi GridView için önce denetimdeki her satır için bir GridViewRow nesne oluşturulması gerekir. Denetimdeki RowCreatedGridView her satır oluşturulduğunda olay oluşturulur. Bu, bu olay her gerçekleştiğinde bir satıra özel içerik ekleme gibi özel bir yordam gerçekleştiren bir olay işleme yöntemi sağlamanıza olanak tanır.

Olay bildirmek, bir temsilci yoluyla olay işleyicisini çağırır. Daha fazla bilgi için bkz. Olayları İşleme ve Oluşturma.

yöntemi, OnRowCreated türetilmiş sınıfların bir temsilci eklemeden olayı işlemesine de izin verir. Bu, türetilmiş bir sınıftaki olayı işlemek için tercih edilen tekniktir.

Devralanlara Notlar

Türetilmiş bir sınıfta geçersiz kıldığınızda OnRowCreated(GridViewRowEventArgs) , kayıtlı temsilcilerin olayı alması için temel sınıfın OnRowCreated(GridViewRowEventArgs) yöntemini çağırdığınızdan emin olun.

Şunlara uygulanır

Ayrıca bkz.