如何在c＃winForm中使用Location定义声明字符串变量？ [英] How to declare string variable with Location definition in c# winForm?

问题描述

  string  labelName =   lblCity; 

lblAmtInWords 是标签名称我在标签属性中给出了..

 lblAmtInWords.Location =  new  Point（lblAmtInWords.Location.X， 238 ）; 
 lblAmtInWords.Location =  new  Point（lblAmtInWords.Location.Y， 684 ）; 

i希望传递 lblCity 而不是 lblAmtInWords

 lblCity.Location =  new  Point（Convert.ToInt32（split1 [i +  1 ]），Convert.ToInt32（split1 [i +  2 ]））; 

得到这样的错误...

错误：'string'不包含'Location'的定义，也没有扩展方法'Location'接受类型'string'的第一个参数（你是否缺少using指令或汇编引用？）

解决方案

我会使用字典< String，Label> 来达到目的，例如

字典<字符串，标签> labelByName =  new  Dictionary< string，Label>（）; 
 labelByName.Add（  price，lblPrice）; 
 labelByName [  price]。text =  请指定价格; 

如果你想传递一个label，然后传递一个标签：一个字符串没有Location属性，因为它不是一个可显示的项目 - 只有基于控件的类。



你可以传递一个标签到一种非常容易的方法：

  public   void  MyMethod（Label lab， string  str，Point p）
 {
 lab.Location = p; 
 lab.Text = str; 
} 
 ... 
 MyMethod（myLabelToTamperWith， 一些文字， new 点（ 100 ， 100 ））; 

但是如果你试图传递一个引用标签的变量的名称，那么它会变得更复杂，你必须根据你的环境使用Reflection或类似的东西。通常，这是一个标志，你已经做了比它需要的复杂得多的事情！ ：笑：

string labelName = "lblCity";

lblAmtInWords is label name which i given in label properties..

lblAmtInWords.Location = new Point(lblAmtInWords.Location.X, 238);
lblAmtInWords.Location = new Point(lblAmtInWords.Location.Y, 684);

i want to pass the lblCity instead of lblAmtInWords

lblCity.Location = new Point(Convert.ToInt32(split1[i + 1]), Convert.ToInt32(split1[i + 2]));

getting error like this...

error:'string' does not contain a definition for 'Location' and no extension method 'Location' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

解决方案

I would use a Dictionary<String, Label> for the purpose, e.g.

Dictionary<String, Label> labelByName = new Dictionary<string, Label>();
labelByName.Add("price", lblPrice);
labelByName["price"].Text = "Please specify the price";

If you want to pass a label, then pass a label: a string does not have a Location property because it's not a displayable item - only Control based classes are.

You can pass a label to a method very easily:

public void MyMethod(Label lab, string str, Point p)
   {
   lab.Location = p;
   lab.Text = str;
   }
...
   MyMethod(myLabelToTamperWith, "Some text", new Point(100,100));

But if you are trying to pass the name of a variable which refers to a label then it gets much more complex, and you have to faff about with Reflection or similar depending on your environment. Normally, it's a sign you have made something far more complicated than it needs to be! :laugh:

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