how to resolve this error

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C#

protected void tb1_TextChanged(object sender, EventArgs e)
        {



         	 string value1 = string.Empty;
            string value2 = string.Empty;
            string value3 = string.Empty;

            string value4 = string.Empty;
            string value5 = string.Empty;


            TextBox txtFirst = (TextBox)sender;
            
switch (txtFirst)//i got error here

case: "txt0";

           
            TextBox tbval0 = (TextBox)Page.Form.FindControl(("txt0"));
            value1 = tbval0.Text.ToString();
Case: "txt2";
           


            TextBox tbval2 = (TextBox)Page.Form.FindControl(("txt2"));
            value2 = tbval2.Text.ToString();


Case: "txt4";
            TextBox tbval3 = (TextBox)Page.Form.FindControl(("txt4"));
            value3 = tbval3.Text.ToString();


case: "txt5";

            decimal sum = 0;

            sum = Convert.ToDecimal(value1) + Convert.ToDecimal(value2) + Convert.ToDecimal(value3);

            TextBox tbval5 = (TextBox)Page.Form.FindControl(("txt5"));
            tbval5.Text = Convert.ToString(sum);

break;

case; "txt1";

            TextBox tbval4 = (TextBox)Page.Form.FindControl(("txt1"));
            value4 = tbval4.Text.ToString();
case "txt3";

            TextBox tbval6 = (TextBox)Page.Form.FindControl(("txt3"));
            value5 = tbval6.Text.ToString();

case "txt6";
            decimal sum1 = 0;

            sum1 = Convert.ToDecimal(value4) + Convert.ToDecimal(value5);

            TextBox tbval7 = (TextBox)Page.Form.FindControl(("txt6"));
            tbval7.Text = Convert.ToString(sum1);

break;
                       


        }

Posted 8-Aug-12 15:45pm

2011999

Updated 8-Aug-12 15:49pm

Wes Aday

v2

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Comments

[no name] 8-Aug-12 21:50pm

And yes you will. You cannot switch on a textbox. Especially when you are trying to switch on the textbox text or maybe name.

Kenneth Haugland 8-Aug-12 21:50pm

How about txtFirst.Name?

2011999 8-Aug-12 21:57pm

txtFirst is hear i get the run time textbox id's

2 solutions

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_Amy · Answer 1 · 2012-08-08T17:04:00

Hi,
You are switching TextBox, but in the case statement you are using string to identify the TextBoxes. Try this:

C#

protected void tb1_TextChanged(object sender, EventArgs e)
{ 
    string value1 = string.Empty;
    string value2 = string.Empty;
    string value3 = string.Empty;
    string value4 = string.Empty;
    string value5 = string.Empty;
    TextBox txtFirst = (TextBox)sender;  
    //Find the textboxes here
    TextBox tbval0 = (TextBox)Page.Form.FindControl(("txt0"));  
    TextBox tbval2 = (TextBox)Page.Form.FindControl(("txt2"));
    TextBox tbval3 = (TextBox)Page.Form.FindControl(("txt4"));
    TextBox tbval5 = (TextBox)Page.Form.FindControl(("txt5"));
    TextBox tbval4 = (TextBox)Page.Form.FindControl(("txt1"));
    TextBox tbval6 = (TextBox)Page.Form.FindControl(("txt3"));
    TextBox tbval7 = (TextBox)Page.Form.FindControl(("txt6"));
    switch (txtFirst.ID.ToString()){
        case "txt0":        
            value1 = tbval0.Text.ToString();
            break;
        case "txt2":        
            value2 = tbval2.Text.ToString(); 
            break;
        case "txt4":        
            value3 = tbval3.Text.ToString();    
            break;
        //Put your all cases here..
        default:
            break;
    }
}

--Amit

**AmitGajjar** · Answer 2 · 2012-08-08T18:16:00

Solution 2

Hi,

Try the solution given in the solution1 by _Amy. you also need to check if your textbox tbval1,tbval2,.... all are not null. If it is null it means it is not able to find that control and you can throw error message.

Otherwise solution 1 is correct.

Thanks
-Amit Gajjar

Posted 8-Aug-12 18:16pm

AmitGajjar