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C# Detect Input In TextBox

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C# Detect Input In TextBox

 
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  #1
Jul 23rd, 2009
Hi, Is it at all possible to detect if a user has inputed text into a text box for example.

C# Syntax (Toggle Plain Text) 
  1. if (textbox1.Text == ("detect if text is in textbox")
  2. {
  3. // do something
  4. }
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Re: C# Detect Input In TextBox

 
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  #2
Jul 23rd, 2009
Use static variable and TextChange event.
Failure is not fatal, but failure to change might be. - John Wooden
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Re: C# Detect Input In TextBox

 
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  #3
Jul 23rd, 2009
you can also use:
c# Syntax (Toggle Plain Text) 
  1. if (!string.IsNullOrEmpty(textBox1.Text))
  2. {
  3.   //Do something
  4. }
Scott Knake
Custom Software Development
Apex Software, Inc.
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Re: C# Detect Input In TextBox

 
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  #4
Jul 23rd, 2009
This is what i am trying to do
C# Syntax (Toggle Plain Text) 
  1. private void button2_Click_1(object sender, EventArgs e)
  2.         {
  3.             FieldStore();
  4.  
  5.             foreach (Control c in panel1.Controls)
  6.             {
  7.  
  8.                     if (!string.IsNullOrEmpty(c.Name = "field1"))
  9.                     {
  10.                         MessageBox.Show("Please Enter At Least One Room Or Put Your Rooms In Numeric Order");
  11.                     }
  12.  
  13.             }
  14.         }
and so far messageboxes are coming up no matter what is in the dynamically created textboxes, i only want it to pop up if there is something in the textbox.
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Re: C# Detect Input In TextBox

 
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  #5
Jul 23rd, 2009
Yeah .. you have a bug in your code that will cause it to never evaluate the condition as true.

Try this:
c# Syntax (Toggle Plain Text) 
  1.     private void button1_Click(object sender, EventArgs e)
  2.     {
  3.       foreach (Control ctrl in panel1.Controls)
  4.       {
  5.         TextBox tb = (ctrl as TextBox);
  6.         if (tb != null)
  7.         {
  8.           if (!string.IsNullOrEmpty(tb.Text))
  9.           {
  10.             tb.Focus();
  11.             MessageBox.Show("Please dont type in the text boxes");
  12.             tb.Focus();
  13.             break;
  14.           }
  15.         }
  16.       }
  17.     }
Last edited by sknake; Jul 23rd, 2009 at 8:04 am.
Scott Knake
Custom Software Development
Apex Software, Inc.
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Re: C# Detect Input In TextBox

 
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  #6
Jul 24th, 2009
thanks thant helps alot but now i'm trying this...
C# Syntax (Toggle Plain Text) 
  1. private void button2_Click_1(object sender, EventArgs e)
  2.         {
  3.             FieldStore();
  4.  
  5.             foreach (Control ctrl in panel1.Controls)
  6.             {
  7.                  TextBox tb = ctrl as TextBox;
  8.                 {
  9.                     if (tb != null)
  10.                     {
  11.                         MessageBox.Show("Error1, Please Enter Areas In Numeric Area And Fill In All Text Boxes");
  12.  
  13.                         if(!string.IsNullOrEmpty (tb.Text))
  14.                         {
  15.                             Form2 form2 = new Form2();
  16.                             form2.Show();
  17.                         }
  18.                     }
  19.                 }
  20.  
  21.  
  22.  
  23.             }
  24.         }
but its displaying the error message even if there is text in text box, any ideas?
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Re: C# Detect Input In TextBox

 
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  #7
Jul 24th, 2009
You put the message box in the wrong place.
C# Syntax (Toggle Plain Text) 
  1.                     if (tb != null)
  2.                     {  
  3.                         if(!string.IsNullOrEmpty(tb.Text))
  4.                         {
  5.                             Form2 form2 = new Form2();
  6.                             form2.Show();
  7.                         }
  8.                         else
  9.                        {
  10.                           //error message goes here...
  11.                        }
  12.                     }
Everybody Lies.
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Re: C# Detect Input In TextBox

 
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  #8
Jul 24th, 2009
Thanks sooo much!
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