掩码文本框中的浮点数 [英] float number in masked textbox

问题描述

hi
我有一个蒙面文本框并将其放入数字5位数。我在它的面具上写了一个漂浮号码为___.__！

但我的问题是如何将它作为浮点数检查？例如，我想如果我的入口号码高于102.00，请在消息框中显示错误。



浮动a;

如果（a> = = 102.00）

{

messagebox.showdialog（错误，）;

}

-----------------------------

a是掩盖的值textbox！

hi i have a masked textbox and put it in numeric 5digits. i've writen float number on its mask as ___.__!
but my problem is how can i check it as a float number? for example, i want if my entrance number is higher than 102.00, show me an error, in a message box.

float a;
if(a>=102.00)
{
messagebox.showdialog("Error","");
}
-----------------------------
"a" is the value of in masked textbox!

推荐答案

您可以使用TryParse尝试解析输入的值。这可以防止引发异常，也可以转换字符串中的值。查看此链接：

String textValue = TextBox1.Text; [ ^ ]



祝你好运！

You can use TryParse to try and parse the entered value. This prevents exceptions to be raised and will also convert the value from string. Check out this link:
String textValue = TextBox1.Text;[^]

Good luck!

我可以使用如下：

i can use as following:

double f = Convert.ToDouble(maskedTextBox6.Text);
            if (f > 102.00)
            {
            MessageBox.Show("Err", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

            serialPort1.WriteLine(maskedTextBox6.Text);

i can use as following:
Collapse | Copy Code

double f = Convert.ToDouble(maskedTextBox6.Text);
            if (f > 102.00)
            {
            MessageBox.Show("Err", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

            serialPort1.WriteLine(maskedTextBox6.Text);

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