GridView.UpdateRow(Int32, Boolean) 方法

  • 参考

定义

命名空间:
System.Web.UI.WebControls
程序集:
System.Web.dll

使用行的字段值更新位于指定行索引位置的记录。

public:
 virtual void UpdateRow(int rowIndex, bool causesValidation);
public virtual void UpdateRow (int rowIndex, bool causesValidation);
abstract member UpdateRow : int * bool -> unit
override this.UpdateRow : int * bool -> unit
Public Overridable Sub UpdateRow (rowIndex As Integer, causesValidation As Boolean)

参数

rowIndex
Int32

要更新的行的索引。

causesValidation
Boolean

true 表示在调用此方法时执行页面验证；否则为 false。

例外

HttpException

GridView 控件被绑定到某个数据源控件，但是与该数据源关联的 DataSourceView 为 null。

示例

下面的示例演示如何使用 UpdateRow 方法以编程方式更新 控件中的 GridView 记录。


<%@ 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 UpdateRowButton_Click(Object sender, EventArgs e)
  {
    // Programmatically update the current record in edit mode.
    CustomersGridView.UpdateRow(CustomersGridView.EditIndex, true);
  }

  void CustomersGridView_RowCommand(Object sender, GridViewCommandEventArgs e)
  {
    // Enable the UpdateRowButton button only when the GridView control
    // is in edit mode.
    switch (e.CommandName)
    {
      case "Edit":
        UpdateRowButton.Enabled = true;
        break;
      case "Cancel":
        UpdateRowButton.Enabled = false;
        break;
      case "Update":
        UpdateRowButton.Enabled = false;
        break;
      default:
        UpdateRowButton.Enabled = false;
        break;
    }
  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView UpdateRow Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView UpdateRow Example</h3>
      
      <asp:button id="UpdateRowButton"
        text="Update Record"
        enabled="false"
        onclick="UpdateRowButton_Click" 
        runat="server"/>
        
      <hr/>

      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView"
        allowpaging="true" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateeditbutton="true"
        datakeynames="CustomerID"
        onrowcommand="CustomersGridView_RowCommand"   
        runat="server">
      </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]"
        updatecommand="Update Customers SET CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country 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 UpdateRowButton_Click(ByVal sender As Object, ByVal e As EventArgs)
      
    ' Programmatically update the current record in edit mode.
    CustomersGridView.UpdateRow(CustomersGridView.EditIndex, True)
    
  End Sub

  Sub CustomersGridView_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
  
    ' Enable the UpdateRowButton button only when the GridView control
    ' is in edit mode.
    Select Case e.CommandName
    
      Case "Edit"
        UpdateRowButton.Enabled = True
      Case "Cancel"
        UpdateRowButton.Enabled = False
      Case "Update"
        UpdateRowButton.Enabled = False
      Case Else
        UpdateRowButton.Enabled = False
    
    End Select
    
  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView UpdateRow Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView UpdateRow Example</h3>
      
      <asp:button id="UpdateRowButton"
        text="Update Record"
        enabled="false"
        onclick="UpdateRowButton_Click" 
        runat="server"/>
        
      <hr/>

      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView"
        allowpaging="true" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateeditbutton="true"
        datakeynames="CustomerID"
        onrowcommand="CustomersGridView_RowCommand"   
        runat="server">
      </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]"
        updatecommand="Update Customers SET CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country WHERE (CustomerID = @CustomerID)"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

注解

UpdateRow使用 方法以编程方式更新数据源中指定索引处的记录。 当你需要从控件外部 GridView （例如从页面上的其他控件）更新记录时，通常使用此方法。

备注

只能对当前处于编辑模式的行或包含双向数据绑定输入控件的行调用此方法。 有关双向绑定表达式的详细信息，请参阅 绑定到数据库。

若要指定是否在更新操作之前执行页面验证，请使用 causesValidation 参数。 调用此方法还会引发 RowUpdated 和 RowUpdating 事件。

适用于

另请参阅