How to create a custom Textbox in WPF? - wpf

Question

I am new to wpf
I want to create a custom textbox with the features such as
Change background color or Change Border Darker/Lighter on GotFocus and LostFocus.
Write only in UPPER CASE
WaterMark
Rounded Corner
I found code for rounded corner in XAML and it works good.
Following is the code :
<TextBox x:Name="txtUserName" BorderThickness="1" Height="23">
<TextBox.Resources>
<Style TargetType="{x:Type Border}">
<Setter Property="CornerRadius" Value="3"/>
</Style>
</TextBox.Resources>
</TextBox>
I use to code in VB.NET Winforms before and I did something like this in there.
I made a class say MainTextBoxex
Public Class MainTextboxex
Inherits TextBox
Private Sub MainTextBoxEx_Enter(sender As Object, e As EventArgs) Handles Me.Enter
Me.BackColor = Color.FromArgb(247, 180, 65)
'Me.SelectAll()
End Sub
Private Sub MainTextBoxEx_Leave(sender As Object, e As EventArgs) Handles Me.Leave
Me.BackColor = Color.White
End Sub
Public Sub New()
MyBase.New()
Me.CharacterCasing = CharacterCasing.Upper
End Sub
Private Sub MainTextboxex_KeyPress(sender As Object, e As KeyPressEventArgs) Handles Me.KeyPress
If e.KeyChar = ChrW(39) Then e.KeyChar = ChrW(96)
End Sub
Private NotInheritable Class NativeMethods
Private Sub New()
End Sub
Private Const ECM_FIRST As UInteger = &H1500
Friend Const EM_SETCUEBANNER As UInteger = ECM_FIRST + 1
<DllImport("user32.dll", EntryPoint:="SendMessageW")>
Public Shared Function SendMessageW(hWnd As IntPtr, Msg As UInteger, wParam As IntPtr, <MarshalAs(UnmanagedType.LPWStr)> lParam As String) As IntPtr
End Function
End Class
Private _watermark As String
Public Property Watermark() As String
Get
Return _watermark
End Get
Set(value As String)
_watermark = value
UpdateWatermark()
End Set
End Property
Private Sub UpdateWatermark()
If IsHandleCreated AndAlso _watermark IsNot Nothing Then
NativeMethods.SendMessageW(Handle, NativeMethods.EM_SETCUEBANNER, CType(1, IntPtr), _watermark)
End If
End Sub
Protected Overrides Sub OnHandleCreated(e As EventArgs)
MyBase.OnHandleCreated(e)
UpdateWatermark()
End Sub
End Class
This worked awesome in winforms as I needed. (No rounded corners in there)
I just need to know how it is done here.
I want something that I don't have to code it everytime or for every Individual TextBox for the above feature everywhere.
Just use this custom TextBox and all set.
This will help me alot.
Thank You.

Answer 1

Use UserControls and CustomControls depending on how much deep you want to dive in your customization.
You can add your own properties by using "Dependency Property", and about the events you can expose Action Events and pass them through your Controls Action events.