.NET中使用GridView控件输入数据时出现“ Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index"的问题

在.NET中使用GridView控件的在线编辑数据时，出现了“ Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index"的关于数据索引值错误的问题，在网上查了许多，感觉都没有什么文章是直接指出解决问题的方法，先就总结下吧

其实，这个问题在操作时是需要非常注意的，它并不在GridView控件的RowEditing或者RowUpdating方法中，而是需要在获取数据的类中指定GridView控件的主键，后台代码如部分如下：

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using System.Data;
 using System.Data.SqlClient;
 using System.Configuration;

 namespace UI
 {
     public partial class _Default : System.Web.UI.Page
     {
         protected void Page_Load(object sender, EventArgs e)
         {
             //判断是否第一次加载Bind()类
             if (!IsPostBack)
             {
                 Bind();
             }
         }

         /// <summary>创建返回数据库连接的公共类
         /// </summary>
         /// <returns>返回连接数据库的类</returns>
         public SqlConnection GetConnection()
         {
                 string str_conn = ConfigurationManager.AppSettings["myConStr"].ToString();
                 SqlConnection myConn = new SqlConnection(str_conn);
                 return myConn;
         }

         /// <summary>将查询的数据绑定到GridView控件中
         /// </summary>
         public void Bind()
         {
             try
             {
                 SqlConnection myConn = GetConnection();
                 myConn.Open();

                 string sql_Str = "select * from stuInfo order by stuAge desc";

                 SqlDataAdapter myda = new SqlDataAdapter(sql_Str, myConn);
                 DataSet myDs = new DataSet();
                 myda.Fill(myDs);

                 GridView1.DataSource = myDs;

                 //为GridView控件设置主键，此处必须有否则会产生如下代码中的溢出错误
                 /*
                  * Index was out of range. Must be non-negative and less than the size of the collection.
                   Parameter name: index
                  */
                 GridView1.DataKeyNames = new string[] { "stuNo" };//GridView控件设置主键，此处最为关键，稍不留意就忘掉了，切记呀
                 GridView1.DataBind();

                 myDs.Dispose();
                 myda.Dispose();
                 myConn.Close();
             }
             catch (Exception ex)
             {
                 Response.Write(ex.Message);
             }
         }

         /// <summary>创建GridView控件的RowEditing事件类
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
         {
             GridView1.EditIndex = e.NewEditIndex;
             this.Bind();
         }

         /// <summary>创建GridView控件的RowUpdating事件类
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
         {
             try
             {
                 //获取在GridView控件里相关事件的键值
                 int stuNum = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
                 string newName = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[].Controls[])).Text.ToString();

                 SqlConnection myConn = GetConnection();
                 myConn.Open();

                 /*
                  * string sql_str = "update stuInfo set stuName='" + newName + "' where stuNo='" + stuNum + "'";
                  *与上句相比，以下使用带参数的SQL语句在一定程度上可防止SQL注入攻击
                 */
                 string sql_str = "update stuInfo set stuName=@newName where stuNo=@stuNum";
                 SqlCommand myCmd = new SqlCommand(sql_str, myConn);
                 myCmd.Parameters.Add("@newName", SqlDbType.NVarChar).Value = newName;
                 myCmd.Parameters.Add("@stuNum", SqlDbType.VarChar).Value = stuNum;

                 if (myCmd.ExecuteNonQuery() > )
                 {
                     Response.Write("<script type='text/javascript'>alert('更新成功');</script>");
                 }
                 else
                 {
                     Response.Write("<script type='text/javascript'>alert('更新失败');</script>");
                 }

                 //调试用
                 textbox1.Text = "学号：" + stuNum + " , 姓名：" + newName + ", " + sql_str + ", ExecuteNonQuery状态：" + myCmd.ExecuteNonQuery();

                 myCmd.Dispose();
                 myConn.Close();
                 GridView1.EditIndex = -;
                 this.Bind();
             }
             catch (Exception ex)
             {
                 Response.Write(ex.Message);
             }
         }

         /// <summary>创建GridView控件的RowCancelingEdit事件类
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         protected void GridView1_RowsCancelingEdit(object sender, GridViewCancelEditEventArgs e)
         {
             GridView1.EditIndex = -;
             this.Bind();
         }
135　　　}
136　}

至于前台页面，无非就是绑定相关的事件了，在这就不贴代码了