先执行OnClientClick,根据执行的结果,是否执行Command事件

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="NET_Default3" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title> <mce:script type="text/javascript"></mce:script></head><body> <form id="form1" runat="server"> <div> <asp:Repeater ID="Repeater1" runat="server" onitemcommand="Repeater1_ItemCommand"> <ItemTemplate> <%#Eval("Column1")%> <asp:LinkButton ID="lb" Text="操作" CommandName="Select" runat="server" OnClientClick="return Check();"></asp:LinkButton> </ItemTemplate> </asp:Repeater> </div> </form></body></html>

using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;public partial class NET_Default3 : System.Web.UI.Page{ public static DataTable DT = new DataTable(); public static DataColumn DC; protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { Repeater1.DataSource=CreateTable(); Repeater1.DataBind(); } } //创建表结构 public static void CreateDateTable() { DC = new DataColumn(); DC.DataType = System.Type.GetType("System.String"); DC.ColumnName = "Column1"; DT.Columns.Add(DC); DC = new DataColumn(); DC.DataType = System.Type.GetType("System.String"); DC.ColumnName = "Column2"; DT.Columns.Add(DC); DC = new DataColumn(); DC.DataType = System.Type.GetType("System.String"); DC.ColumnName = "Column3"; DT.Columns.Add(DC); } //向Datatable填充数据 public static DataTable CreateTable() { CreateDateTable(); for (int i = 0; i < 10; i++) { DataRow DR = DT.NewRow(); DR["Column1"] = i; DR["Column2"] = i + 1; DR["Column3"] = i + 2; DT.Rows.Add(DR); } return DT; } protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e) { if (e.CommandName == "Select") { ClientScript.RegisterStartupScript(this.GetType(), "js", "alert('OK');", true); } } }