I am using the following code to try to set the Textbox value as 0 when textbox1.text ="".
if(textbox1.text=="")
{
int.Parse(textbox1.Text) == 0.ToString();
}
However I recieve the following error:
Error: CS0201: Only assignment, call, increment, decrement, and new object expressions can be used as a statement.
How do I set the textbox value to 0 in C#?
A simple assignment operator should do the job. You really don't need to do any parsing and equality comparison operator:
if(textbox1.Text == "")
{
textbox1.Text = "0";
}
you are parsing the value of the TextBox to integer ,but you don't want to do that ,you want to set it's value, so simply use the setter property
yourTextBox.Text="0";
and then you are setting it wrong using the conditional == instead of the assignment =
== is used to check if two things are equal ex: 1==1
you should use this = to assign or set
Solution for your problem
if (string.IsNullorEmpty(textbox1.Text))
{
textbox1.Text = "0";
}
Reasons for your problem
int.Parse returns an integer and you are trying to compare string to int.== operator is used to check whether left hand side is equal to right hand side, which you are trying to use as an assignment operator.
if(String.IsNullOrEmpty(textbox1.Text))
{
textbox1.Text = "0";
}
IsNullOrEmpty wud check for null values also.
There are couple of things wrong with the code.
int.Parse if its able to parse will give a int value while you have set up a comparison of the same with a string.
Next you can use string.IsNullOrEmpty to check if the TextBox is empty or not.
Finally you can just assign "0" as string to the .Text property of the TextBox
if(String.IsNullOrEmpty(textbox1.Text))
{
textbox1.Text = "0";
}
Try to use this:
if(textbox1.Text == "")
{
textbox1.Text = "0";
}
