事件的重载与委托“System.EventHandler”不匹配

码拜

10年 ago

错误提示：【编译器错误消息: CS0123: “GridView1_RowCommand”的重载均与委托“System.EventHandler”不匹配】代码如下: C#： pre class=”brush: csharp”>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default5 : System.Web.UI.Page { protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e) { if (e.CommandName.ToLower() == “information”) { Label1.Text = “姓名=” + e.CommandArgument.ToString(); } } } JS： pre class=”brush: javascript”><!DOCTYPE html> <html xmlns=”http://www.w3.org/1999/xhtml”> <head runat=”server”> <meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″/> <title></title> </head> <body> <form id=”form1″ runat=”server”> <div> <asp:Label ID=”Label1″ runat=”server” Text=”Label”></asp:Label> </div> <asp:GridView ID=”GridView1″ runat=”server” AutoGenerateColumns=”False” DataSourceID=”SqlDataSource1″ OnSelectedIndexChanged=”GridView1_RowCommand”> <Columns> <asp:BoundField DataField=”部门” HeaderText=”部门” SortExpression=”部门” /> <asp:BoundField DataField=”省区” HeaderText=”省区” SortExpression=”省区” /> <asp:BoundField DataField=”办事处” HeaderText=”办事处” SortExpression=”办事处” /> <asp:BoundField DataField=”职级” HeaderText=”职级” SortExpression=”职级” /> <asp:BoundField DataField=”办公电话” HeaderText=”办公电话” SortExpression=”办公电话” /> <asp:BoundField DataField=”姓名” HeaderText=”姓名” SortExpression=”姓名” /> <asp:BoundField DataField=”备注电话” HeaderText=”备注电话” SortExpression=”备注电话” /> <asp:BoundField DataField=”电子邮箱” HeaderText=”电子邮箱” SortExpression=”电子邮箱” /> <asp:BoundField DataField=”备注” HeaderText=”备注” SortExpression=”备注” /> <asp:ButtonField ButtonType=”Button” Text=”按钮” CommandName=”informatiom”/> </Columns> </asp:GridView> <asp:SqlDataSource ID=”SqlDataSource1″ runat=”server” ConnectionString=”Provider=Microsoft.Jet.OLEDB.4.0;Data Source=G:\VB制作\通讯录best2\数据库\dahaoda-txl.mdb” ProviderName=”System.Data.OleDb” SelectCommand=”SELECT [部门], [省区], [办事处], [职级], [办公电话], [姓名], [备注电话], [电子邮箱], [备注] FROM [XXXX]”></asp:SqlDataSource> </form> </body> </html>
40分	你好，GridView1_RowCommand方法的事件是onrowdatabound，而非OnSelectedIndexChanged
	更正是：onrowcommand事件
	不匹配参数类型不对事件里面第二个事件类型写错了
	错误的原因： OnSelectedIndexChanged的委托是System.EventHandler(Object sender, EventArgs e),所以应该用onRowCommand 更改如下： <!DOCTYPE html> <html xmlns=”http://www.w3.org/1999/xhtml”> <head runat=”server”> <meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″/> <title></title> </head> <body> <form id=”form1″ runat=”server”> <div> <asp:Label ID=”Label1″ runat=”server” Text=”Label”></asp:Label> </div> <asp:GridView ID=”GridView1″ runat=”server” AutoGenerateColumns=”False” DataSourceID=”SqlDataSource1″ OnRowCommand=”GridView1_RowCommand”> <Columns> <asp:BoundField DataField=”部门” HeaderText=”部门” SortExpression=”部门” /> <asp:BoundField DataField=”省区” HeaderText=”省区” SortExpression=”省区” /> <asp:BoundField DataField=”办事处” HeaderText=”办事处” SortExpression=”办事处” /> <asp:BoundField DataField=”职级” HeaderText=”职级” SortExpression=”职级” /> <asp:BoundField DataField=”办公电话” HeaderText=”办公电话” SortExpression=”办公电话” /> <asp:BoundField DataField=”姓名” HeaderText=”姓名” SortExpression=”姓名” /> <asp:BoundField DataField=”备注电话” HeaderText=”备注电话” SortExpression=”备注电话” /> <asp:BoundField DataField=”电子邮箱” HeaderText=”电子邮箱” SortExpression=”电子邮箱” /> <asp:BoundField DataField=”备注” HeaderText=”备注” SortExpression=”备注” /> <asp:ButtonField ButtonType=”Button” Text=”按钮” CommandName=”informatiom”/> </Columns> </asp:GridView> <asp:SqlDataSource ID=”SqlDataSource1″ runat=”server” ConnectionString=”Provider=Microsoft.Jet.OLEDB.4.0;Data Source=G:\VB制作\通讯录best2\数据库\dahaoda-txl.mdb” ProviderName=”System.Data.OleDb” SelectCommand=”SELECT [部门], [省区], [办事处], [职级], [办公电话], [姓名], [备注电话], [电子邮箱], [备注] FROM [XXXX]”></asp:SqlDataSource> </form> </body> </html>