Question

    protected void grd_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
        con.Open();
        string query = "delete from details where sno='"+grd.DataKeys[e.RowIndex].Value+"'";-----(getting error like Index was out of range. Must be non-negative and less than the size of the collection.Parameter name: index)
        SqlCommand cmd = new SqlCommand(query,con);
        cmd.ExecuteNonQuery();
        filldata();
        con.Close();  
     }

像Index这样的错误超出了范围。必须是非负数且小于集合的大小

Answer 1

{

      SqlConnection con=newSqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
      con.Open();
      int Sno = Convert.ToInt32(grd.DataKeys[e.RowIndex].Values[0].ToString());
      string query="delete from Details where Sno="+Sno;
      SqlCommand cmd = new SqlCommand(query, con);
      int result = cmd.ExecuteNonQuery();
      con.Close();

}

Answer 2

错误来自以下声明

grd.DataKeys[e.RowIndex]

并且意味着e.RowIndex的值超出了grd.DataKeys数组中元素的范围。

要进一步调试，您需要找出e.RowIndex的值，并查看grd.DataKeys数组中有多少元素。

Answer 3

您应该在.aspx页面中为GridView添加DataKeyNames="your_id_column"属性

然后在grd_RowDeleting方法中，您可以grd.DataKeys[e.RowIndex].Value或grd.DataKeys[e.RowIndex].Values["your_id_column"]

访问它

对字符串

也是更好的解析结果

在网格视图行中删除

3 个答案: