Windows窗体控件-启用 [英] windows form control - enable

问题描述

Windows窗体上有两个组合框.
在代码中，取决于按钮的单击事件，它们都会被启用或禁用，即

cbo1.enabled = true;
cbo2.enabled = true;

或

cbo1.enabled = false;
cbo2.enabled = false;

禁用它们时，cbo2变灰，但cbo1不可更改(即已禁用)，cbo1具有白色背景，并且仅其中的文本变灰. cbo1与cbo2一样没有完全变灰.

在设计模式下，两个控件的Backcolor均设置为Window
在设计模式下，两个控件的Forecolor均设置为WindowText

问题:
您知道为什么cbo1没有完全变灰吗?
谢谢

解决方案

检查cbo1是否放置在另一个控件上！ /blockquote>

可能发生的情况是，即使看起来像控件的BackColor，它也不再是默认值.

当将颜色更改为某种颜色，然后通过选择默认颜色名称将其更改回原来的颜色时，可能会发生这种情况.这会将以下行放入designer.cs文件中.

 此 .cb01.BackColor = System.Drawing.SystemColors.Window; 

当控件真正使用其默认颜色设置进行操作时，该行将丢失.

我不知道为什么这会导致问题，但是它具有使启用和禁用的颜色相同的效果.

解决方法:
1)在设计器中显示表格
2)选择cb01
3)转到属性，然后右键单击BackColor
4)如果重置选项可用，则重置

这是重置设计器属性的正确方法，应该可以解决问题.

艾伦.

There are two combo boxes on the windows form.
Inside the code depending on the click event of a button they both become enabled or disabled i.e.

cbo1.enabled = true;
cbo2.enabled = true;

or

cbo1.enabled = false;
cbo2.enabled = false;

When they are disabled, cbo2 is greyed out but although cbo1 is not changeable (i.e. it is disabled) cbo1 has a white background and only the text inside it is greyed out. cbo1 is not completely greyed out as same as cbo2.

Backcolor of both controls is set to Window in design mode
Forecolor of both controls is set to WindowText in design mode

Question:
Do you know why the cbo1 is not completely greyed out?
Thanks

解决方案

Check whether the cbo1 is placed on another control !!

Pls share your full code to help you!

What may have happened is that the BackColor of the control is no longer the default, even though it looks as if it is.

This can happen when the color is changed to something and then changed back by selecting the default color name. This will have put the following line in the designer.cs file.

this.cb01.BackColor = System.Drawing.SystemColors.Window;

When the control is really operating with it''s default color setting that line will be missing.

I don''t know why this causes a problem but it has the effect of making making the enabled and disabled colors the same.

To fix:
1) Bring up the form in the designer
2) Select cb01
3) Goto properties and right click on the BackColor
4) If the Reset option is available then Reset

This is the proper way to reset a designer property and should fix the problem.

Alan.

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