在Visual Studio用户控件中将字符串加倍 [英] String to double in Visual Studio usercontrol

问题描述

我有一个usercontrol，其中只有一个文本框.我想将文本框的string解析为double(我正在进行大量计算).我认为在usercontrol的代码文件中执行此操作应该很容易，所以我尝试了如下操作:

I have a usercontrol with only a textbox in it. I want to parse the string of that textbox to a double (I''m making lots of calculations). I thought it should be easy to do that in the code-file of the usercontrol, so I tried something like this:

public double txt
{ 
    get { return double.Parse(txtInput.Text); } 
    set { txtInput.Text = value.ToString(); } 
}

当我这样做时，没有问题.在我的form上，我正在尝试做:

When I do this, there is no problem. On my form I''m trying to do:

vCurrent = Math.Round(uscontrTextbox.txt * velocity, 4);

但是当我这样做时，出现以下错误:
Cannot implicitly convert type ''string'' to ''double''
此错误与以下格式的designer class有关:

But when I do this I get the following error:
Cannot implicitly convert type ''string'' to ''double''
This error is related to the designer class of the form:

this.uscontrTextbox.txt = "";

我该如何解决?

How can I solve this?

推荐答案

vCurrent = Math.Round(Convert.ToDouble(uscontrTextbox.txt) * velocity, 4);

或

而不是

or

instead of,

this.uscontrTextbox.txt = "";

使用，

this.uscontrTextbox.txt = 0;

祝您编程愉快！
:)

Happy coding!
:)

<pre>get
{
if(txtInput.Text=="")return 0;
else return double.Parse(txtInput.Text); 
}

为了不将默认字符串设置为"0"，我在用户控件中使用了以下代码:

In order to not set the default string as "0" I used the following code in my usercontrol:

public double txt
{ 
    get { return double.Parse(txtInput.Text); } 
    set { txtInput.Text = value.ToString(); } 
}

public string text
{
     get { return txtInput.Text; }
     set { txtInput.Text = value; }
}

然后在替换形式的设计器类中

And in the designer class of the form I replaced

this.uscontrTextbox.txt = "";

和

this.uscontrTextbox.text = "";

这篇关于在Visual Studio用户控件中将字符串加倍的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！