在运行时显示错误 [英] Showing error in runtime

问题描述

显示错误

showing Error

Server Error in '/' Application.
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS1061: 'ASP.webform1_aspx' does not contain a definition for 'GridView1_SelectedIndexChanged' and no extension method 'GridView1_SelectedIndexChanged' accepting a first argument of type 'ASP.webform1_aspx' could be found (are you missing a using directive or an assembly reference?)

Source Error:

Line 11:     <div>
Line 12:     
Line 13:         <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
Line 14:             BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" 
Line 15:             CellPadding="3" onselectedindexchanged="GridView1_SelectedIndexChanged" 


Source File: c:\Users\manish\Desktop\my vb program\WebApplication7\WebApplication7\WebForm1.aspx    Line: 13

我尝试过：

What I have tried:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OleDb;
using System.Data;


namespace WebApplication7
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        public OleDbConnection con;
        public OleDbCommand cmd;
        public OleDbDataAdapter adt;
        public DataSet ds;

    
        protected void Page_Load(object sender, EventArgs e)
        {
            if(!IsPostBack)
            {
               fillGridData();

        }
    }
    private void fillGridData()
{
    con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\manish\Desktop\my vb program\test.accdb");
con.Open();

        adt = new OleDbDataAdapter("select * from demo",con);
        ds=new DataSet();
        adt.Fill(ds);
        GridView1.DataSource=ds;
        GridView1.DataBind();

    }



        protected void Button1_Click(object sender, EventArgs e)
        {
                         con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\manish\Desktop\my vb program\test.accdb");
con.Open();
string data1;
string cname;
string cmobile;
string caddress;
            cname=(GridView1.FooterRow.FindControl("TextBox1") as TextBox).Text;
            cmobile=(GridView1.FooterRow.FindControl("TextBox2") as TextBox).Text;
            caddress=(GridView1.FooterRow.FindControl("TextBox3") as TextBox).Text;
            data1="insert into demo values("+ cname+",'"+ cmobile +"','"+ caddress +"')";
            cmd = new OleDbCommand(data1,con);
            cmd.ExecuteNonQuery();
            con.Close();
            fillGridData();
            Label4.Text ="data saved successfully";
        }

        }

        
        }

推荐答案

查看错误消息

Look at the error message

'ASP.webform1_aspx' does not contain a definition for 'GridView1_SelectedIndexChanged'

什么是寻找名为GridView1_SelectedIndexChanged的方法？看看你的gridview定义

What is is looking for a method called GridView1_SelectedIndexChanged? Look at your gridview definition

onselectedindexchanged="GridView1_SelectedIndexChanged" 

好​​的，现在看看你的代码隐藏了，你有一个名为GridView1_SelectedIndexChanged的方法吗？不，所以当选择的索引更改事件被触发时它不知道该怎么办。



如果你对这个事件感兴趣，你需要添加这个事件 - 代码隐藏的处理程序，如果您对该事件不感兴趣，请从gridview定义中删除相关属性。



GridView.SelectedIndexChanged Event（System.Web.UI.WebControls） [ ^ ]

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