How to increase or decrease no of rows in datagridview in windows forms

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How to increase or decrease the no of rows in datagridview based on the value entered in the textbox in windows forms application using C#.
The no of Columns is fixed to 3.

My Requirement like a form filling which contains Three Columns like S.No, CompanyName,Location. Based on the Requirement i want to select no of rows and enter the values.

Posted 26-Aug-15 1:44am

M.Balakrishna

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Arasappan 26-Aug-15 7:59am

do u whant to show the top

M.Balakrishna 26-Aug-15 8:07am

S. Based on the requriment want to increase the rows

Arasappan 26-Aug-15 8:23am

set auto postback on text box

Arasappan 26-Aug-15 8:28am

on textbox text changed
{
write the query

select top '"+value.TextBox+"' * from tbl_customerdetails
}

CHill60 26-Aug-15 9:31am

Open to SQL Injection attacks. Use parameterised query instead

Arasappan 27-Aug-15 1:20am

ha ha...am just giving idea Chill60

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CHill60 · Answer 1 · 2015-08-26T03:30:00

If you want the user to enter the details then try something like

C#

private void textBox1_Validated(object sender, EventArgs e)
{
    dataGridView1.Rows.Clear();
    dataGridView1.AllowUserToAddRows = false;

    int numRows;
    if (int.TryParse(textBox1.Text, out numRows))
    {
        dataGridView1.Rows.Add(numRows);
    }
}

You will also need some validation to check that all the rows of the "form" have been "filled in" e.g. in the dataGridView1_Validating event