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how can I set a default value to zero if nothing is entered into the textbox?
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VS2010
how can I set a default value to zero if nothing is entered into the textbox?
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CHill60 10-Mar-15 9:22am    
What have you tried?
What language?
Web or Windows?
What kind of textbox?
Member 10617989 10-Mar-15 9:33am    
textbox in vb2010
something like that
If TextBox1.Text = "" Then TextBox1.Text = 0 End If If TextBox2.Text = "" Then TextBox2.Text = 0 End If
CHill60 10-Mar-15 9:36am    
And you are saying your code doesn't work? What happens?
Use the Reply link so that I am notified when you respond
Member 10617989 10-Mar-15 9:44am    
yah the code is doesnt work!
CHill60 10-Mar-15 10:04am    
"yah the code is doesn't work!" does not explain "What happens"!! I was expecting a description of the error
In your code you are trying to set text to a numeric ... try If TextBox1.Text = "" Then TextBox1.Text = "0"

2 solutions

See: Int32.TryParse[^] method.

Example:
C#
int result = 0;

if (!Int32.TryParse(TextBox1.Text, result))
    //conversion failed, default value of result is equal to 0 (zero)
else
    //conversion OK, result is eqaul to the value entered into TextBox ;)
 
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Posted
Updated 10-Mar-15 3:48am
v2
As per the comments to the post, OP had written code
VB
If TextBox1.Text = "" Then
    TextBox1.Text = 0 
End If 
If TextBox2.Text = "" Then 
    TextBox2.Text = 0 
End If

I.e. they were assigning a numeric 0 to a string.
Changing the code to
VB
If TextBox1.Text = "" Then
    TextBox1.Text = "0" 
End If 
If TextBox2.Text = "" Then 
    TextBox2.Text = "0" 
End If
solved the problem
 
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