How I Can Delete A Row From Gridview

Question

1.00/5 (1 vote)

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.NET4.5

i have a gridview and data coming from datasource when i m trying to delete a row from gridview it showing "Deleting is not supported by data source 'SqlDataSource1' unless DeleteCommand is specified"
my code is

C#

string id;
        id=GridView1.DataKeys[e.RowIndex].Value.ToString();
        cmd.CommandText = "delete from room_allotment where Student_id='" + id + "'";
            conn.Open();
            int x = cmd.ExecuteNonQuery();
            conn.Close();
            if (x > 0)
            {
                DataBind();
            }
            else
            {
                lblmsg.Text = "Error..Plz try again";
            }

Posted 23-Nov-14 7:53am

vivek kesharwani

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Comments

DamithSL 23-Nov-14 14:05pm

in which event you have above code?

PIEBALDconsult 23-Nov-14 14:28pm

0) Don't use concatenation to form an SQL statement; use parameters.
1) Deleting is generally a bad idea; consider setting a status instead.
2) A grid does not make for a good User Interface, particularly when editting/deleting is involved.
3) To remove a row from a Grid, you need to affect the DataTable it uses as a source. There are a few ways to do that, including setting the DefaultView.RowFilter property.
4) I hope you are not using strnigs as IDs -- integers and GUIds are better.
5) There is no reason to use ToString, just use a cast.

MJ2014 23-Nov-14 15:24pm

Pls add full code .such that we can understand and give a solution

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