c# winform Math question

james james

ii have 3 text boxes I have data in 2 of them, I need the third box to look at the first 2 and if textbox1 is less than textbox 2 than textbox 3 will equal whats in textbox2. If textbox1 is greater than textbox2 it will equal textbox1.

This is what I have tried as you notice the third line is Equal how can I use < less than?

private void txtMinLogic_TextChanged(object sender, EventArgs e)
{
string a = txtHalfDayUsage.Text;
string b = tbGreaterThan.Text;
if (a.Equals(b))
{
txtMinLogic.Text = "";
}
else
{
txtMinLogic.Text = txtHalfDayUsage.Text;
}
}

2 Replies

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james james8y ago
I have sloved the issue see code below. I hope this will help others.
private void txtMinLogic_TextChanged(object sender, EventArgs e)
       {

           double txt1;
           double txt2;
           if (double.TryParse(txtHalfDayUsage.Text, out txt1) && double.TryParse(tbGreaterThan.Text, out txt2))
           {
               if (txt1 == txt2)
               {
                   txtMinLogic.Text = "";
               }
               else if (txt1 > txt2)
               {
                   txtMinLogic.Text = txt1.ToString();
               }
               else
               {
                   txtMinLogic.Text = txt2.ToString();
               }
           }
           else
           {
               int txt1Length = txtHalfDayUsage.Text.Length;
               int txt2Length = tbGreaterThan.Text.Length;
               if (txt1Length == txt2Length)
               {
                   txtMinLogic.Text = "";
               }
               else if (txt1Length > txt2Length)
               {
                   txtMinLogic.Text = txtHalfDayUsage.Text;
               }
               else
               {
                   txtMinLogic.Text = tbGreaterThan.Text;


               }
           }
       }
0
Jaish Mathews8y ago
Operator >, < etc.. applicable to numeric types. So you need to wrap a string type with int.Parse() e.g. if( int.Parse(a) < int.Parse(b)).

NB: Value can't be empty here. You need to check it like if empty, 0 can assign etc...part of your logic.
+1