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This article mainly introduces how to solve the problem of VB.NET form inheritance, the article is very detailed, has a certain reference value, interested friends must read it!

1. Create a base form Form1 and put three TextBox in the form, which will be TextBox1 TextBox2 TextBox3.

2. Add a KeyDown event to TextBox1 (automatically jump to TextBox2 when the ENTER key is pressed in TextBox1), as follows:

Private Sub TextBox1_KeyDown (ByVal sender As Object, ByVal e As System.Windows.Forms. KeyEventArgs) Handles TextBox1.KeyDown If e.KeyCode = Keys.Enter Then TextBox2.Focus () End Sub

3. Add VB.NET form inheritance, select Form1 as the base form, and create an inheritance form. It's just that the controls in the window cannot be modified (properties / events) at this time.

4. If you want to modify the KeyDown event of the TextBox1 in the inherited form, you need to modify the KeyDown event in the TextBox1 of the base form to:

Public Overridable Sub TextBox1_KeyDown

(ByVal sender As Object, ByVal e

As System.Windows.Forms.KeyEventArgs)

Handles TextBox1.KeyDown

If e.KeyCode = Keys.Enter Then

TextBox2.Focus ()

End Sub

Note: change the original "Private" to "Public Overridable" here

Then the following code is copied into the VB.NET form inheritance:

Public Overrides Sub TextBox1_

KeyDown (ByVal sender As Object

ByVal e As System.Windows.

Forms.KeyEventArgs) Handles

TextBox1.KeyDown

If e.KeyCode = Keys.Enter

Then TextBox3.Focus ()

End Sub

5. The property bar of the TextBox1 control in the inherited form is grayed out (that is, it cannot be modified). If you need to modify the control properties, please modify the code in the base form.

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In the base form From1 code [code generated by the Windows forms designer] section, find the

Friend WithEvents TextBox1

As System.Windows.Forms.TextBox

Just change "Friend" to "Public".

6. What you should pay attention to in VB.NET forms inheritance is:

At design time, when you build a project that contains a base form, changes to the appearance of the base form (the setting of properties or the addition or decrease of controls) are reflected on the inherited form. Saving changes to the base form is not enough. To build the project, choose build from the build menu.

These are all the contents of the article "how to solve the inheritance problem of VB.NET forms". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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