Tag Archives: preview changes

Make a TextBox preview extender provider in C#

This example shows how to convert the TextBox preview techniques described in the last few posts into an extender provider. The previous examples showed the basic technique, but they were hard-wired to specific TextBox controls so they weren’t very flexible. … Continue reading

Posted in controls, extensions, user interface | Tagged , , , , , , , , , , , , , , | Leave a comment

Make the user enter a float in C#

The posts Preview TextBox changes in C# and Preview TextBox changes in C#, Part 2 show how you can make a TextBox accept only integers. This example is similar except it makes a TextBox only accept floats. This change is … Continue reading

Posted in controls, user interface | Tagged , , , , , , , , , , , , , , , | Leave a comment

Preview TextBox changes in C#, Part 2

Part 1 of this post explained how the example previews changes made by keyboard events. It then accepts or cancels the changes depending on whether the TextBox control’s new value is a valid integer (or the start of one as … Continue reading

Posted in controls, user interface | Tagged , , , , , , , , , , , , | Leave a comment

Preview TextBox changes in C#

One of the more annoying omissions from the Windows Forms controls is a way to preview changes to a TextBox before they occur. For example, suppose you want the user to enter a floating point value in a TextBox. The … Continue reading

Posted in controls, user interface | Tagged , , , , , , , , , , , , | 2 Comments