我有一个gridview,它有自动生成的删除按钮。网格有一个datakeyname,由于某种原因,我收到此错误:消息:索引超出范围。必须是非负数且小于集合的大小。参数名称:index
我看了很多教程和例子。这段代码应该正常吗?
protected void grdBins_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
int rec_id = int.Parse(grdBins.DataKeys[e.RowIndex].Value.ToString());
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "delete from t_run_schedule_lots " +
"where rec_id = @id";
cmd.Parameters.Add("@id", SqlDbType.Int).Value = rec_id ;
cmd.CommandType = CommandType.Text;
cmd.Connection = this.sqlConnection1;
this.sqlConnection1.Open();
//execute insert statement
cmd.ExecuteNonQuery();
this.sqlConnection1.Close();
//re-populate grid */
fill_grid();
grdBins.EditIndex = -1;
grdBins.DataBind();
// this bit was just to see if I was capturing the ID field properly.
lblBins.Visible = true;
lblBins.Text = rec_id.ToString();
}
如果有人知道C#中的一个很好的例子可以使这项工作,我将不胜感激。
答案 0 :(得分:0)
听起来你在gridview aspx中没有DataKeyNames="rec_id"
?
如果您没有让页面知道它们是什么
这是您的代码的重构版本。
protected void grdBins_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
int rec_id = int.Parse(grdBins.DataKeys[e.RowIndex].Value.ToString());
using (SqlConnection conn = new SqlConnection(connectionString)){
conn.Open();
string cmdText = @"delete from t_run_schedule_lots
where rec_id = @id";
using (SqlCommand cmd = new SqlCommand(cmdText, conn)){
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@id", rec_id);
cmd.ExecuteNonQuery();
}
}
grd.EditIndex = -1;
fill_grid();
grdBins.DataBind();
}
答案 1 :(得分:0)
我可能会误解你的问题,但根据here,EditIndex属性从零开始,所以你不能将它设置为-1。将其设置为该值将抛出ArgumentOutOfRangeException。
答案 2 :(得分:0)
以下是我为实现目标所做的工作:
GridViewRow row = (GridViewRow)grdBins.Rows[e.RowIndex];
Label id = (Label)row.FindControl("Label9");
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "delete from t_run_schedule_lots " +
"where rec_id = @id";
cmd.Parameters.Add("@id", SqlDbType.Int).Value = Convert.ToInt32(id.Text) ;
虽然我不知道为什么RowIndex选项不起作用。无论如何它现在正在运作。