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Background I was looking for something out-of-the-box from WPF where no extra coding of style or template is needed for displaying validation errors, where we just need to code the validation logic for each control and it should automatically display an error icon or message next to the control.
However, I did not find anything straightforward like that in WPF. But it can be achieved in two simple steps. Let us add code so that when values are entered in the above text boxes, they automatically run validation and if there are validation errors, they will be displayed next to the corresponding control.
In order to do this, the following two steps are needed: Let us start with a very simple validation control template where all we have is a TextBlock which will display a red exclamatory sign next to the control that has an error.
Now let us just replace the TextBlock in the above validation control template code the line that is in bold with the StackPanel containing an ellipse and a TextBlock to display the same validation error, as below: That is all that is needed for the simplest validation error to show up next to the control.
Notice in the validation control template, we are using a DockPanel as the layout control, therefore we can easily change where the error icon and error message will be displayed. We can display them on top of the control that is failing validation as the above pictureor on the left, right, or bottom.The Unicode Consortium develops the Unicode Standard.
This post shows how to write a DataGrid in WPF to a CSV file.
We will export the data contained in the DataGrid along with the column headers to a CSV file. Here’s how it can be done. Step 1: Build a CSV string from the DataGrid. We would like to show you a description here but the site won’t allow us.
Introduction to XAML. XAML stands for Extensible Application Markup Language. Its a simple language based on XML to create and alphabetnyc.com objects with hierarchical relations.
Escape it with another ampersand (&&). Set UseMnemonic for that label to false.
This causes all ampersands within the text to be taken literally so you don't need to double any of them. Well, if you write WPF applications, you bet your ass you have! In this post, I would like to show you how I like to deal with enums in WPF.
Fo this post, I will be using the following enum to bind to.