Cannot find column 0.

Question

1.00/5 (1 vote)

See more:

private void txtAdd_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        if (txtAdd.Text != string.Empty && txtSahr.Text != string.Empty)
        {

            DataRow r = dt.NewRow();

            r[0] = txtNameMada.Text;
            r[1] = txtSahr.Text;
            r[2] = txtAdd.Text;
            r[3] = txtAdd_all.Text;

            cleartext();

            dt.Rows.Add(r);
            dataGridView6.DataSource = dt;
            txtsum.Text =
                   (from DataGridViewRow row in dataGridView6.Rows
                    where row.Cells[3].FormattedValue.ToString() != string.Empty
                    select Convert.ToDouble(row.Cells[3].FormattedValue)).Sum().ToString("0,0");

        }
        else
        {
            MessageBox.Show("ادخال كمية من العدد");
            //  txtAdd_Karton.Focus();
            txtAdd.Clear();
            return;
        }
    }
}

What I have tried:

Cannot find column 0.

Posted 31-Jul-18 23:55pm

waleed_akre

Updated 1-Aug-18 1:30am

Add a Solution

Comments

Kenneth Haugland 1-Aug-18 5:56am

Where is dt declared? like dt = new Table?

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2018-08-01T01:31:00

If the error occurs at this line:

C#

r[0] = txtNameMada.Text;

Then the table is empty: it contains no columns, and hence no data.

Since it is a class level variable, I'd start by looking at the method where you load it in the first place, because that establishes the schema for the table - and if you create a local variable called dt within your method:

C#

private DataTable dt = new DataTable();
void MyMethod(void)
   {
   DataTable dt = new DataTable();
   myDataAdapter.Fill(dt);
   ...
   }

Then that masks the class level version and it never gets filled with any schema, much less data.