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Showing posts from August, 2020

What Are xmlns and xmlns:x in WPF? Understanding XML Namespace Declarations

In WPF (Windows Presentation Foundation), xmlns and xmlns:x are XML namespace declarations used in XAML files. They define the scope of XML namespaces, which are used to distinguish between elements and attributes that might have the same name but are used in different contexts. xmlns : The Default XML Namespace Definition : xmlns stands for XML namespace. It is used to declare the default namespace for the elements in the XAML file. Purpose : In WPF, it typically maps to the .NET namespaces that contain the classes and controls used in WPF applications. This default namespace allows you to use the WPF controls and elements without prefixing them. Example : <Window x:Class="WpfApp.MainWindow"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    ... > <Grid>        <Button Content="Click Me"/>     </Grid> </Window> Here, xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" sets...
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How to Import/Export data of DataGrid from/to CSV file in wpf using MVVM

In this post i will explain how to Import/Export data of DataGrid from/to CSV file in wpf using MVVM To Import CSV to DataGrid i have created method called LoadCSV() which will load CSV data and update the DataGrid  private void LoadCSV()         {             LstEmployees.AddRange(File.ReadAllLines("csvFilePath")                                          .Skip(1)                                          .Select(v => CsvToEmployees(v))                                          .ToList());         }          In LoadCSV() method i am first reading the CSV using File cla...
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Multiple ways to handle Checked/Unchecked event in wpf using MVVM

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In this post i am trying to explain multiple way to handle Checked/Unchecked event in wpf using MVVM First let's create a view which contains multiple CheckBox.  All CheckBox will handle the Checked/Unchecked event differently.  CheckBoxEx.xaml <Window x:Class="PrismApp.Views.CheckBoxEx"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:prism="http://prismlibrary.com/"              prism:ViewModelLocator.AutoWireViewModel="True">     <StackPanel >         <CheckBox Content="Bind Command by passing CheckBox as CommandParameter but set command parameter type is object" HorizontalAlignment="Left" VerticalAlignment="Center"  Name="chkObj"            ...
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