Question

急！！！！！索引超出范围。必须为非负值并小于集合大小。有具体程序，帮忙分析下，谢谢！

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

using System.Data.OleDb;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
String conString = "provider = Microsoft.Ace.OLEDB.12.0 ; Data Source =" + MapPath("App_Data/数据.accdb");
OleDbConnection con = new OleDbConnection();
con.ConnectionString = conString;
OleDbCommand command = new OleDbCommand();
command.Connection = con;

String sqlString = "select * from Student_Information";
command.CommandText = sqlString;

OleDbDataAdapter dataAdapter = new OleDbDataAdapter(command);
DataTable dt = new DataTable();
dataAdapter.Fill(dt);

this.GridView1.DataSource = dt;
this.GridView1.DataBind();

}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
String conString = "provider = Microsoft.Ace.OLEDB.12.0 ; Data Source = " + MapPath("App_Data/数据.accdb");
OleDbConnection con = new OleDbConnection();
con.ConnectionString = conString;
OleDbCommand command = new OleDbCommand();
command.Connection = con;

string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
string SqlStr = "delete from Student_Information where Student_ID=" + "'" + id + "'";
command.CommandText = SqlStr;

con.Open();
command.ExecuteNonQuery();
con.Close(); Response.Redirect("\\新建 公文包\\Default.aspx");
Response.End();

}

protected void GridView1_SelectedIndexChanged1(object sender, EventArgs e)
{

}
}
string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();被指出如标题所示问题，应该怎么改呢？

Answer 1

看看GridView1属性页的DataKeyNames设置了没有，如果没有，在上面写上你的主键名如：id，如果再有什么object无法识别之类的问题，把你的string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();的Values[0]的[0]去掉再看看。