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Article ID: 814312 - Last Review: December 3, 2007 - Revision: 2.9
Text after the first line is lost when you modify the Multiline property of the RichTextBox control from true to false
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Beta Information
This article discusses a Beta release of a Microsoft
product. The information in this article is provided as-is and is subject to
change without notice.
No formal product support is available from
Microsoft for this Beta product. For information about how to obtain support
for a Beta release, see the documentation that is included with the Beta
product files, or check the Web location from which you downloaded the release.
SYMPTOMS
When you type multiple lines of text in a
RichTextBox control, and then modify the
Multiline property from
True to
False, you lose the text in the
RichTextBox after the first line. When you modify the
Multiline property, only the first line exists in the
RichTextBox. However, when you modify the
Multiline property from
True to
False for a
RichTextBox, all the text of the control is appended to the first
line.
WORKAROUND
To work around this problem, save the text in the
RichTextBox before you toggle the
Multiline property. After you modify the
Multiline property, append all the text lines into the first line, and then
assign the text back to the
RichTextBox. To do this, use the following code:
Visual Basic .NET or Visual Basic 2005 Code ' Create an Array
Dim myStrArr() As String
myStrArr = RichTextBox1.Text.Split(vbLf.ToString)
' Set Multiline Property value to False
RichTextBox1.Multiline = False
Dim idx As Integer
RichTextBox1.Text = ""
For idx = 0 To myStrArr.Length - 1
RichTextBox1.Text += myStrArr(idx) & " "
Next idx
// Create a string Array.
string []myStrArr;
myStrArr = richTextBox1.Text.Split('\n');
// Set multiline property value to false.
richTextBox1.Multiline = false;
int idx;
richTextBox1.Text = "";
for(idx = 0; idx < myStrArr.Length ;idx++)
{
richTextBox1.Text += myStrArr[idx]+ " ";
}
STATUS
This
behavior is by design.
MORE INFORMATION
Steps to Reproduce the Behavior
- Start Microsoft Visual Studio .NET or Microsoft Visual Studio 2005.
- Create a Windows application by using Visual Basic 2005, Visual Basic .NET, Visual C# 2005, or
Visual C# .NET.
By default, Form1 is created. - Drag a RichTextBox control to
Form1.
- Drag a Button control to Form1.
- Double-click Button1, and then add the
following code to the Button1_Click event handler:
Visual Basic .NET or Visual Basic 2005 CodeRichTextBox1.Multiline = False
richTextBox1.Multiline = false;
- On the Build menu, click Build
Solution.
- Press the F5 key to run the project.
- Type two or three lines of text in the RichTextBox, and then click Button1.
REFERENCES
For more information, visit the following MSDN Web
site:
Introduction to the Windows Forms RichTextBox
Control
http://msdn2.microsoft.com/en-us/library/aa983713(VS.71).aspx
(http://msdn2.microsoft.com/en-us/library/aa983713(VS.71).aspx)
APPLIES TO
- Microsoft .NET Framework 2.0
- Microsoft .NET Framework 1.1
- Microsoft .NET Framework 1.0
- Microsoft Visual Basic 2005
- Microsoft Visual Basic .NET 2003 Standard Edition
- Microsoft Visual Basic .NET 2002 Standard Edition
- Microsoft Visual C# 2005 Express Edition
- Microsoft Visual C# .NET 2003 Standard Edition
- Microsoft Visual C# .NET 2002 Standard Edition
| kbvs2005swept kbvs2005applies kbctrl kbwindowsforms kbrichedit kbforms kbcontrol kbprb KB814312 |
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