Checking the value in a textbox

Question

4.00/5 (1 vote)

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I would like to perform the following operation using a textbox and button in WPF/ Visual C#

C#

private button_click()
{
if ( textbox.text ! = integer) //something like that
{
MessageBox.Show("enter a valid number");
textbox.Text.clear();
<< get the input from user again using the same textbox and request the user to click the button again
}
else
{
newCar.cylinders = double.Parse(textBox.Text);
}
}

Any help would be much appreciated. Thanks.

Posted 13-Sep-11 4:52am

steersteer

Updated 13-Sep-11 5:10am

Herman<T>.Instance

v2

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#realJSOP · Accepted Answer · 2011-09-13T05:02:00

Solution 1

Just do this:

C#

int value;
if (Int32.TryParse(textBox.Text, out value))
{
    // do something

}
else
{
    // show error

}

Posted 13-Sep-11 5:02am

#realJSOP

Comments

steersteer 13-Sep-11 11:08am

Thanks.