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Hi guys,

Im having a problem with the textbox_textchanged event.

What i want: When I enter a number in textbox1, some math manipulation happens and the answer is displayed in textbox2. So everytime the user changes textbox1 values the answer in textbox2 should automatically change.

Now when i try to change the input value (when i backspace) the answer just goes to 0, and does changed again when I input a new value.

Am i using the wrong textbox event?

C#
private void textBox9_TextChanged(object sender, EventArgs e)
        {
            // Output Min and Max

            MaxC = Math.Round((CVAL * (1 + range)), 3);
            MinC = Math.Round((CVAL * (1 - range)), 3);
            MaxP = Math.Round((pVAL * (1 + range)), 3);
            MinP = Math.Round((pVAL * (1 - range)), 3);
            Maxsi = Math.Round((siVAL * (1 + range)), 3);
            Minsi = Math.Round((siVAL * (1 - range)), 3);
            Maxsc = Math.Round((scrap * (1 + range)), 3);
            Minsc = Math.Round((scrap * (1 - range)), 3);
            Maxtemp = Math.Round((temp * (1 + range)), 3);
            Mintemp = Math.Round((temp * (1 - range)), 3);

            textBox2.Text = Convert.ToString(MaxC);
            textBox4.Text = Convert.ToString(MinC);
            textBox10.Text = Convert.ToString(MaxP);
            textBox6.Text = Convert.ToString(MinP);
            textBox12.Text = Convert.ToString(Maxsi);
            textBox11.Text = Convert.ToString(Minsi);
            textBox14.Text = Convert.ToString(Maxsc);
            textBox13.Text = Convert.ToString(Minsc);
            textBox16.Text = Convert.ToString(Maxtemp);
            textBox15.Text = Convert.ToString(Mintemp);
        }



The variable "range" is the input from textBox9
Posted
Updated 27-Feb-12 22:00pm
v2
Comments
OriginalGriff 28-Feb-12 3:40am    
Unlikely - but we need to see the code for your TextBox.TextChanged event.
Use the "Improve question" widget to edit your question and provide better information.
P.Salini 28-Feb-12 3:44am    
post your code so that we can help you
nikki88 28-Feb-12 4:05am    
Thanks, I've posted my code

set the property(of your textbox) AutoPostBack =true
 
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Comments
Dhol Gaurav 28-Feb-12 4:02am    
Bikash there are no AutoPostBack property in case of Windows Application
This correct seems to have solved the problem, thanks guys


C#
<pre lang="cs">private void textBox9_TextChanged(object sender, EventArgs e)
        {
            // Output Min and Max




           if  ((string.IsNullOrWhiteSpace(textBox9.Text)))

           {
               textBox2.Text = "";
            textBox4.Text = "";
            textBox10.Text = "";
            textBox6.Text = "";
            textBox12.Text = "";
            textBox11.Text = "";
            textBox14.Text = "";
            textBox13.Text = "";
            textBox16.Text = "";
           }

           else
           {

            range = Convert.ToDouble(textBox9.Text.Trim());

            MaxC = Math.Round((CVAL * (1 + range)), 3);
            MinC = Math.Round((CVAL * (1 - range)), 3);
            MaxP = Math.Round((pVAL * (1 + range)), 3);
            MinP = Math.Round((pVAL * (1 - range)), 3);
            Maxsi = Math.Round((siVAL * (1 + range)), 3);
            Minsi = Math.Round((siVAL * (1 - range)), 3);
            Maxsc = Math.Round((scrap * (1 + range)), 3);
            Minsc = Math.Round((scrap * (1 - range)), 3);
            Maxtemp = Math.Round((temp * (1 + range)), 3);
            Mintemp = Math.Round((temp * (1 - range)), 3);

            textBox2.Text = Convert.ToString(MaxC);
            textBox4.Text = Convert.ToString(MinC);
            textBox10.Text = Convert.ToString(MaxP);
            textBox6.Text = Convert.ToString(MinP);
            textBox12.Text = Convert.ToString(Maxsi);
            textBox11.Text = Convert.ToString(Minsi);
            textBox14.Text = Convert.ToString(Maxsc);
            textBox13.Text = Convert.ToString(Minsc);
            textBox16.Text = Convert.ToString(Maxtemp);
            textBox15.Text = Convert.ToString(Mintemp);
            }
 
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