GridView.DeleteRow(Int32) Metodo

  • Riferimento

Definizione

Spazio dei nomi:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Elimina dall'origine dati il record in corrispondenza dell'indice specificato.

public:
 virtual void DeleteRow(int rowIndex);
public virtual void DeleteRow (int rowIndex);
abstract member DeleteRow : int -> unit
override this.DeleteRow : int -> unit
Public Overridable Sub DeleteRow (rowIndex As Integer)

Parametri

rowIndex
Int32

Indice della riga da eliminare.

Eccezioni

HttpException

Il controllo GridView non è associato un controllo origine dati.

NotSupportedException

Il controllo origine dati, a cui è associato il controllo GridView, non supporta operazioni di eliminazione oppure non vi è alcun comando di eliminazione definito per l'origine dati.

Esempio

Nell'esempio seguente viene illustrato come utilizzare il DeleteRow metodo per eliminare a livello di codice un record in un GridView controllo .


<%@ 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 DeleteRowButton_Click(Object sender, EventArgs e)
  {
    // Programmatically delete the selected record.
    CustomersGridView.DeleteRow(CustomersGridView.SelectedIndex);
  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView DeleteRow Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView DeleteRow Example</h3>

      <asp:button id="DeleteRowButton"
        text="Delete Record"
        onclick="DeleteRowButton_Click" 
        runat="server"/>

      <hr/>

      <asp:gridview id="CustomersGridView" 
        allowpaging="true"
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateselectbutton="true"
        datakeynames="CustomerID"
        selectedindex="0"   
        runat="server">
        
        <selectedrowstyle BackColor="lightblue"/>
        
      </asp:gridview>
            
      <!-- 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="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        deletecommand="Delete from Customers where CustomerID = @CustomerID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </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 DeleteRowButton_Click(sender As Object, e As EventArgs)
 
    ' Programmatically delete the selected record.
    CustomersGridView.DeleteRow(CustomersGridView.SelectedIndex)
    
  End Sub
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView DeleteRow Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView DeleteRow Example</h3>

      <asp:button id="DeleteRowButton"
        text="Delete Record"
        onclick="DeleteRowButton_Click" 
        runat="server"/>

      <hr/>

      <asp:gridview id="CustomersGridView" 
        allowpaging="true"
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateselectbutton="true"
        datakeynames="CustomerID"
        selectedindex="0"   
        runat="server">
        
        <selectedrowstyle BackColor="lightblue"/>
        
      </asp:gridview>
            
      <!-- 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="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        deletecommand="Delete from Customers where CustomerID = @CustomerID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

Commenti

Utilizzare il DeleteRow metodo per eliminare il record a livello di codice in corrispondenza dell'indice specificato dall'origine dati. Questo metodo viene comunemente usato quando è necessario eliminare un record dall'esterno del GridView controllo, ad esempio da un controllo diverso nella pagina. La chiamata a questo metodo genera anche gli RowDeleted eventi e RowDeleting .

Si applica a

Vedi anche