ColorDialog.ShowHelp 属性
获取或设置一个值，该值指示在颜色对话框中是否显示“帮助”按钮。
**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）
语法
声明
Public Overridable Property ShowHelp As Boolean
用法
Dim instance As ColorDialog
Dim value As Boolean
value = instance.ShowHelp
instance.ShowHelp = value
public virtual bool ShowHelp { get; set; }
public:
virtual property bool ShowHelp {
bool get ();
void set (bool value);
}
/** @property */
public boolean get_ShowHelp ()
/** @property */
public void set_ShowHelp (boolean value)
public function get ShowHelp () : boolean
public function set ShowHelp (value : boolean)
属性值
如果在对话框中显示“帮助”按钮，则为 true；否则为 false。默认值为 false。
示例
下面的代码示例演示如何创建新的 ColorDialog。此示例要求从一个现有窗体调用该方法，且该窗体上须有一个 TextBox 和 Button。
Private Sub button1_Click(sender As Object, e As System.EventArgs)
Dim MyDialog As New ColorDialog()
' Keeps the user from selecting a custom color.
MyDialog.AllowFullOpen = False
' Allows the user to get help. (The default is false.)
MyDialog.ShowHelp = True
' Sets the initial color select to the current text color,
MyDialog.Color = textBox1.ForeColor
' Update the text box color if the user clicks OK
If (MyDialog.ShowDialog() = DialogResult.OK) Then
textBox1.ForeColor = MyDialog.Color
End If
End Sub 'button1_Click
private void button1_Click(object sender, System.EventArgs e)
{
ColorDialog MyDialog = new ColorDialog();
// Keeps the user from selecting a custom color.
MyDialog.AllowFullOpen = false ;
// Allows the user to get help. (The default is false.)
MyDialog.ShowHelp = true ;
// Sets the initial color select to the current text color.
MyDialog.Color = textBox1.ForeColor ;
// Update the text box color if the user clicks OK
if (MyDialog.ShowDialog() == DialogResult.OK)
textBox1.ForeColor = MyDialog.Color;
}
private:
void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
ColorDialog^ MyDialog = gcnew ColorDialog;
// Keeps the user from selecting a custom color.
MyDialog->AllowFullOpen = false;
// Allows the user to get help. (The default is false.)
MyDialog->ShowHelp = true;
// Sets the initial color select to the current text color.
MyDialog->Color = textBox1->ForeColor;
// Update the text box color if the user clicks OK
if ( MyDialog->ShowDialog() == ::DialogResult::OK )
{
textBox1->ForeColor = MyDialog->Color;
}
}
protected void button1_Click(Object sender, System.EventArgs e)
{
ColorDialog myDialog = new ColorDialog();
// Keeps the user from selecting a custom color.
myDialog.set_AllowFullOpen(false);
// Allows the user to get help. (The default is false.)
myDialog.set_ShowHelp(true);
// Sets the initial color select to the current text color.
myDialog.set_Color(textBox1.get_ForeColor());
// Update the text box color if the user clicks OK
if (myDialog.ShowDialog().Equals(get_DialogResult().OK)) {
textBox1.set_ForeColor(myDialog.get_Color());
}
} //button1_Click
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0