[英]Winform - Custom TextBox change backcolor when Readonly
嗨,我有一个自定义TextEditor
:
public partial class TextEditor : TextBox
{
public TextEditor() : base()
{
this.Font = new Font("Calibri", 12.0f);
this.BackColor = Color.Gainsboro;
this.BorderStyle = BorderStyle.FixedSingle;
if (this.ReadOnly)
{
this.BackColor = Color.DarkGray;
}
}
protected override void InitLayout()
{
base.InitLayout();
base.CharacterCasing = _charCasing;
//SetStyle(ControlStyles.UserPaint, true);
}
}
我想在属性ReadOnly = true
但BackGroundColor
时更改其BackGroundColor
。
有什么线索吗?
您正在构造函数上执行此操作。 其中ReadOnly
默认为False
您需要的是监听ReadOnlyChanged
事件
public partial class TextEditor : TextBox
{
public TextEditor()
{
this.Font = new Font("Calibri", 12.0f);
this.BackColor = Color.Gainsboro;
this.BorderStyle = BorderStyle.FixedSingle;
ReadOnlyChanged += OnReadOnlyChanged;
}
private void OnReadOnlyChanged(object sender, EventArgs eventArgs)
{
if (ReadOnly)
BackColor = Color.DarkGray;
}
protected override void InitLayout()
{
base.InitLayout();
CharacterCasing = _charCasing;
//SetStyle(ControlStyles.UserPaint, true);
}
}
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