I have a textbox in my form. On the form load event, i want my textbox.text = "Enter Name" but it should appear as if the textbox is clicked, the text of the textbox gets disappeared. Attached image will help you understanding my question :)
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possible duplicate of Watermark System.Windows.Forms.TextBox using C#Caleb– Caleb2011-12-20 04:38:54 +00:00Commented Dec 20, 2011 at 4:38
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3 Answers
3 Comments
Brad Christie
Either you found the same site in a google search, or you are copying a reference made on a previous SO answer. If the latter, make sure to cite the author's post in your answer.
William Melani
@BradChristie good point. I flagged this q with that post, might as well post it here too.
Brad Christie
Also, I here's another one using WndProc (If author doesn't mind that).
Use TextBox.ForeColor and change it to gray and Enter/Leave events of textBox to change the color and remove the text
Comments
here is a solution without DllImport usage
/// <summary>
/// inspired by this forum entry: http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/10f75954-6d14-4926-a02d-98649653b9c8/
/// Watermark TextBox in winform
/// </summary>
public class WatermarkTextBox : TextBox
{
private string watermarkText;
private Color watermarkColor;
private Color foreColor;
private bool isTextBoxEmpty;
public WatermarkTextBox()
{
this.WatermarkText = "Watermark Text...";
this.WatermarkColor = Color.FromKnownColor(KnownColor.Silver);
this.Enter += onEnter;
this.Leave += onLeave;
}
[Browsable(true)]
public new Color ForeColor
{
get { return this.foreColor; }
set
{
if (value == this.foreColor)
{
return;
}
this.foreColor = value;
if (!this.isTextBoxEmpty)
{
base.ForeColor = value;
}
}
}
[Browsable(true)]
public Color WatermarkColor
{
get { return this.watermarkColor; }
set
{
if (value == this.watermarkColor)
{
return;
}
this.watermarkColor = value;
if (this.isTextBoxEmpty)
{
base.ForeColor = this.watermarkColor;
}
}
}
[Browsable(true)]
public string WatermarkText
{
get { return this.watermarkText; }
set
{
if (value == this.watermarkText)
{
return;
}
this.watermarkText = value;
if (base.Text.Length == 0)
{
this.isTextBoxEmpty = true;
base.Text = this.watermarkText;
base.ForeColor = this.watermarkColor;
}
this.Invalidate();
}
}
public override string Text
{
get { return this.isTextBoxEmpty ? string.Empty : base.Text; }
set
{
if (string.IsNullOrEmpty(value))
{
this.isTextBoxEmpty = true;
base.ForeColor = this.watermarkColor;
base.Text = this.watermarkText;
}
else
{
this.isTextBoxEmpty = false;
base.ForeColor = this.foreColor;
base.Text = value;
}
}
}
private void onEnter(object sender, EventArgs e)
{
if (this.isTextBoxEmpty)
{
this.isTextBoxEmpty = false;
base.ForeColor = this.foreColor;
base.Text = string.Empty;
}
}
private void onLeave(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(base.Text))
{
this.isTextBoxEmpty = true;
base.ForeColor = this.watermarkColor;
base.Text = this.watermarkText;
}
else
{
this.isTextBoxEmpty = false;
}
}
}
