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FormView.DeleteItem Yöntem

  • Başvuru

Tanım

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

Denetimdeki FormView geçerli kaydı veri kaynağından siler.

public:
 virtual void DeleteItem();
public virtual void DeleteItem ();
abstract member DeleteItem : unit -> unit
override this.DeleteItem : unit -> unit
Public Overridable Sub DeleteItem ()

Örnekler

Aşağıdaki örnek, veri kaynağından bir FormView denetimdeki DeleteItem geçerli kaydı program aracılığıyla silmek için yönteminin nasıl kullanılacağını gösterir.


<%@ 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 DeleteButton_Click(Object sender, EventArgs e)
  {

    // Use the DeleteItem method to programmatically delete
    // the current record in the FormView control. 
    EmployeeFormView.DeleteItem();

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>FormView DeleteItem Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>FormView DeleteItem Example</h3>
                       
      <asp:formview id="EmployeeFormView"
        datasourceid="EmployeeSource"
        allowpaging="true"
        datakeynames="EmployeeID" 
        runat="server">
        
        <itemtemplate>
        
          <table>
            <tr>
              <td>
                <asp:image id="EmployeeImage"
                  imageurl='<%# Eval("PhotoPath") %>'
                  alternatetext='<%# Eval("LastName") %>' 
                  runat="server"/>
              </td>
              <td>
                <h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>      
                <%# Eval("Title") %>        
              </td>
            </tr>
          </table>
        
        </itemtemplate>
          
      </asp:formview>
      
      <hr/>
      
      <asp:Button id="DeleteButton"
        text="Delete Record"
        onclick="DeleteButton_Click" 
        runat="server"/>
          
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="EmployeeSource"
        selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
        deletecommand="Delete [Employees] Where [EmployeeID]=@EmployeeID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        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 DeleteButton_Click(ByVal sender As Object, ByVal e As EventArgs)

    ' Use the DeleteItem method to programmatically delete
    ' the current record in the FormView control. 
    EmployeeFormView.DeleteItem()

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>FormView DeleteItem Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>FormView DeleteItem Example</h3>
                       
      <asp:formview id="EmployeeFormView"
        datasourceid="EmployeeSource"
        allowpaging="true"
        datakeynames="EmployeeID" 
        runat="server">
        
        <itemtemplate>
        
          <table>
            <tr>
              <td>
                <asp:image id="EmployeeImage"
                  imageurl='<%# Eval("PhotoPath") %>'
                  alternatetext='<%# Eval("LastName") %>' 
                  runat="server"/>
              </td>
              <td>
                <h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>      
                <%# Eval("Title") %>        
              </td>
            </tr>
          </table>
        
        </itemtemplate>
          
      </asp:formview>
      
      <hr/>
      
      <asp:Button id="DeleteButton"
        text="Delete Record"
        onclick="DeleteButton_Click" 
        runat="server"/>
          
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="EmployeeSource"
        selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
        deletecommand="Delete [Employees] Where [EmployeeID]=@EmployeeID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>
            
    </form>
  </body>
</html>

Açıklamalar

Denetimdeki DeleteItem geçerli kaydı FormView veri kaynağından program aracılığıyla silmek için yöntemini kullanın. Bu yöntem genellikle geçerli kaydı, sayfadaki farklı bir denetim gibi denetimin dışından FormView silmeniz gerektiğinde kullanılır. Bu yöntemin çağrılması ve ItemDeleting olaylarını ItemDeleted da tetikler.

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