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GridViewRowEventHandler 委托

  • 参考

定义

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

表示处理 RowCreated 控件的 RowDataBound 和 GridView 事件的方法。

C# 
public delegate void GridViewRowEventHandler(object sender, GridViewRowEventArgs e);

参数

sender
Object

事件源。

e
GridViewRowEventArgs

包含事件数据的 GridViewRowEventArgs 对象。

示例

下面的示例演示如何以编程方式向 控件的 GridView 事件添加GridViewRowEventHandler委托RowDataBound。

ASP.NET (C#) 

<%@ 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 Page_Load(Object sender, EventArgs e)
  {
        
    // Create a new GridView control.
    GridView customersGridView = new GridView();
         
    // Set the GridView control's properties.
    customersGridView.ID = "CustomersGridView";
    customersGridView.DataSourceID = "CustomersSqlDataSource";
    customersGridView.AutoGenerateColumns = true;
    customersGridView.AllowPaging = true;

    // Programmatically register the event-handling method.
    customersGridView.RowDataBound += new GridViewRowEventHandler(this.CustomersGridView_RowDataBound);
       
    // Add the GridView control to the Controls collection
    // of the PlaceHolder control.
    GridViewPlaceHolder.Controls.Add(customersGridView);

  }

  void CustomersGridView_RowDataBound(Object sender, GridViewRowEventArgs e)
  {
        
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
      // Display the company name in italics.
      e.Row.Cells[1].Text = "<i>" + e.Row.Cells[1].Text + "</i>";
        
    }
    
  }

</script>

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

      <asp:placeholder id="GridViewPlaceHolder"
        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="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
            
    </form>
  </body>
</html>

以下示例演示如何以声明方式向 控件的 GridView 事件添加GridViewRowEventHandler委托RowDataBound。

ASP.NET (C#) 

<%@ 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 CustomersGridView_RowDataBound(Object sender, GridViewRowEventArgs e)
  {
        
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
      // Display the company name in italics.
      e.Row.Cells[1].Text = "<i>" + e.Row.Cells[1].Text + "</i>";
        
    }
    
  }

</script>

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

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        allowpaging="true"
        onrowdatabound="CustomersGridView_RowDataBound" 
        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]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
            
    </form>
  </body>
</html>

注解

GridView在呈现控件之前，必须为控件中的每一行创建 一个 GridViewRow 对象。 RowCreated每次在控件中创建行时都会GridView引发 事件。 这允许你提供一个事件处理方法，该方法执行自定义例程，例如，每当发生此事件时，向行添加自定义内容。

同样，控件中的每一行都必须绑定到数据源中的记录，然后才能呈现控件 GridView 。 RowDataBound当由对象) 表示GridViewRow的数据行 (绑定到 控件中的数据时，GridView将引发 该事件。 这允许你提供执行自定义例程的事件处理方法，例如，每当发生此事件时，修改绑定到行的数据的值。

创建 GridViewRowEventHandler 委托时，需要标识将处理该事件的方法。 若要将事件与事件处理程序关联，请将该委托的一个实例添加到事件中。 除非移除了该委托，否则每当发生该事件时就会调用事件处理程序。 有关事件处理程序委托的详细信息，请参阅 处理和引发事件。

扩展方法

GetMethodInfo(Delegate)

获取指示指定委托表示的方法的对象。

适用于

产品 版本
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

另请参阅