C#中的只读文本框
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Read-only textbox in C#
提问by Avik
In C#, I am creating a form window for a LAN messenger with two textboxes. I need to create a particular textbox as read-only, but any text submitted to it is appearing grey which is not desirable. Is there any way that can be prevented?
在C# 中，我正在为带有两个文本框的 LAN 信使创建一个表单窗口。我需要创建一个特定的文本框作为只读，但提交给它的任何文本都显示为灰色，这是不可取的。有什么办法可以预防吗？
回答by Cerebrus
The grey color is indicative of the ReadOnly state of the textbox. It is a visual indication to the user who will not need to enter text to discover that the textbox is in fact, disabled.
灰色表示文本框的只读状态。这是对用户的视觉指示，用户无需输入文本即可发现文本框实际上已禁用。
If you need only the readonly behaviour, you would be better off using a Label instead.
如果您只需要只读行为，最好使用 Label 代替。
回答by benPearce
You could replace it with a label or on the text box in the KeyPress event, set handled to true:
您可以将其替换为标签或 KeyPress 事件中的文本框，将其设置为 true：
void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = true;
}
回答by Michael Logothetis
You can set the colour of the text by setting the TextboxForeColorproperty.
您可以通过设置Textbox ForeColor属性来设置文本的颜色。
For example:
例如：
myTextBox.ForeColor = Color.Black
myTextBox.ForeColor = Color.Black
回答by Oran Dennison
I would use a Textbox and set ReadOnly to true, ForeColor to Color.Black, and BackColor to Color.White. This way you can still select the text and copy it with Ctrl-C.
我会使用文本框并将 ReadOnly 设置为 true，将 ForeColor 设置为 Color.Black，将 BackColor 设置为 Color.White。这样您仍然可以选择文本并使用 Ctrl-C 复制它。
回答by Oran Dennison
In order to keep the textbox white (or Window) when it's read-only, you must explicitly set the BackColor property to Window. To do this, you must first set the BackColor to some other value, then back to Window. The backcolor property should become bold indicating it is no longer the default value.
为了在只读时保持文本框为白色（或 Window），您必须将 BackColor 属性显式设置为 Window。为此，您必须首先将 BackColor 设置为某个其他值，然后再设置回 Window。backcolor 属性应该变成粗体，表示它不再是默认值。
