How to check if value from a cell in a column is !=NULL?

Question

I'm trying on gridview updated to check if a cell from a certain column is != NULL ( to check if the user wrote something into the cell)

My problem is I don't know how to get the "x column" value from cell.

What db framework are you using? Linq to SQL, Entity Framework, ADO.Net? — Eric Andres, Mar 13 '12 at 16:11

score 1 · Answer 1 · 2012-03-14T11:14:21.937

inzi irina Please look at this code. don't forget to vote me if this helps you

private void button2_Click(object sender, EventArgs e)
    {
        foreach (DataGridViewRow dr in dataGridView1.Rows)
        {
            string lngth = Convert.ToString(dr.Cells[1].Value);
            if (lngth.Length > 0)
            {
                listBox1.Items.Add(dr.Cells[0].Value);
            }
        }
    }

score 0 · Answer 2 · answered Mar 13 '12 at 16:11

0

I assume you are approaching through following ways...

You have a footer template and may have a button which saves the values from your footer.

You have an Edit/Update button in grid for each row

For Approach 1(i.e. Footer Template)

You can find like below...

TextBox testing = (TextBox)grd.FooterRow.FindControl("Your Control ID");

For Approach 2 (i.e. using Edit/Update Button)

You can do like below..

Sample Code Behind

protected void grd_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    TextBox testing = (TextBox)grd.Rows[e.RowIndex].FindControl("Your Control ID");
}

Sample HTML

<asp:GridView ID="grd" runat="server" onrowupdating="grd_RowUpdating">
</asp:GridView>

answered Mar 13 '12 at 16:11

Pankaj

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It didn't worked , I just want to get the value from a cell on row updateD – Inzi Irina Mar 13 '12 at 16:44
you should have a grd_RowUpdating event handler. This will make your life very easy. – Pankaj Mar 13 '12 at 16:45
yea but , control id =? id of the column? – Inzi Irina Mar 13 '12 at 17:05
id of the textbox control in that template – Pankaj Mar 13 '12 at 17:07
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/8834/discussion-between-pankaj-garg-and-inzi-irina) – Pankaj Mar 13 '12 at 18:07
I can't write in chat I don't know why – Inzi Irina Mar 13 '12 at 18:30
There's just a simple gridview ,and on row updating " protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { TextBox testing = (TextBox)GridView1..Rows[e.RowIndex].FindControl("Name"); } where Name = column name . – Inzi Irina Mar 13 '12 at 18:50
Seems like you need to change the approach. Take a look at this link http://stackoverflow.com/a/9595501/1209450 – Pankaj Mar 14 '12 at 06:37

How to check if value from a cell in a column is !=NULL?

2 Answers2

For Approach 1(i.e. Footer Template)

For Approach 2 (i.e. using Edit/Update Button)

Linked