Creating a User Control for Multi-Line Text Entry in a Text Box

Question

How can a user control be created to incorporate a multi-line text entry feature for a text box?

At the moment of design, you need to enter multi-line text

Public Property _Text As String
    Get
        Return txtNorTarget.Text
    End Get
    Set(value As String)
        txtNorTarget.Text = value
    End Set
End Property

Answer 1

Hi @Mansour_Dalir ,

Adding Browsable and Editor attributes to the property.

<System.ComponentModel.Browsable(True)>
<System.ComponentModel.Editor(GetType(System.ComponentModel.Design.MultilineStringEditor), GetType(System.Drawing.Design.UITypeEditor))>
Public Property _Text As String
    Get
        Return txtNorTarget.Text
    End Get
    Set(value As String)
        txtNorTarget.Text = value
    End Set
End Property

Best Regards.

Jiachen Li

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Answer 2

To create a user control that incorporates a multi-line text entry feature for a text box in a Windows Forms application, you can follow these steps:

1. Create a User Control: Start by creating a new User Control in your project.
2. Add a TextBox Control: Drag a TextBox control onto your User Control. Set the Multiline property of the TextBox to true to allow multiple lines of text.
3. Set Additional Properties: You may also want to set the WordWrap property to true and add scroll bars if necessary. This can enhance the usability of the multi-line text box.
4. Expose Properties: Create properties in your User Control to expose the TextBox's text and other relevant properties. For example, you can create a property named _Text that gets and sets the text of the TextBox.

Here’s a sample implementation in VB.NET:

Public Class MultiLineTextBoxControl
    Inherits UserControl

    Private txtMultiLine As New TextBox()

    Public Sub New()
        ' Initialize the TextBox
        txtMultiLine.Multiline = True
        txtMultiLine.WordWrap = True
        txtMultiLine.ScrollBars = ScrollBars.Vertical
        Me.Controls.Add(txtMultiLine)
    End Sub

    Public Property _Text As String
        Get
            Return txtMultiLine.Text
        End Get
        Set(value As String)
            txtMultiLine.Text = value
        End Set
    End Property
End Class

In this example, the MultiLineTextBoxControl class inherits from UserControl, initializes a multi-line TextBox, and provides a property _Text to interact with the TextBox's text.

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References:

• How to create a user control (Windows Forms .NET)
• TextBox Control Overview (Windows Forms)