Auto check an ASP.net check box when the value of an asp.net textbox is  > or = to $5000 in an asp.net gridview

Posted on 2012-08-29
Medium Priority
Last Modified: 2012-08-29
I am looking for how to automatically check a checkbox in an ASP.NET gridview row when the value in a textbox in that same row is  = too or greater than $5000.00
if (txtTextbox >= 5000)
   chkCheckbox.Checked = true;
  chkCheckbox.Checked = false;

I have searched all over the internet and have not come across any examples
Question by:newjeep19
  • 2
  • 2
LVL 18

Expert Comment

by:Rajar Ahmed
ID: 38345946
Add row databound to your gridview and try this,
protected void gvData_RowDataBound(object sender, GridViewRowEventArgs e)
        if (e.Row.RowType == DataControlRowType.DataRow)
            TextBox txtBox = (TextBox)e.Row.FindControl("txtTextbox");//Give your textbox Id 

            CheckBox chkBox = (CheckBox)e.Row.FindControl("chkCheckbox");
            //if (Convert.ToInt32(txtBox.Text) >= 5000)
            if (!string.IsNullOrEmpty(txtBox.Text) && Int32.Parse(txtBox.Text) >= 500)
                chkBox.Checked = true;
                chkBox.Checked = false;


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Author Comment

ID: 38346127
I am getting the below error message with this part of the code:
             Int32.Parse(txtBox.Text) >= 500)
error message:
Input string was not in a correct format.
LVL 18

Accepted Solution

Rajar Ahmed earned 2000 total points
ID: 38346180
try this,
//if (!string.IsNullOrEmpty(txtBox.Text) && Int32.Parse(txtBox.Text) >= 500)
  if (IsNumeric(TextBox1.Text) && Int32.Parse(TextBox1.Text) >= 500)//Replace To this
//Add this method
 public static Boolean IsNumeric(string stringToTest)
        int result;
        return int.TryParse(stringToTest, out result);

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Author Closing Comment

ID: 38346204

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