检查文本框中的值 [英] Checking the value in a textbox

问题描述

我想在WPF/Visual C#中使用文本框和按钮执行以下操作

I would like to perform the following operation using a textbox and button in WPF/ Visual 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);
}
}

任何帮助将非常感激.谢谢.

Any help would be much appreciated. Thanks.

推荐答案

只需执行以下操作:

Just do this:

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

}
else
{
    // show error

}

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