Merge pull request #1 from SyncfusionExamples/ES-975464

ES-975464 - Resolve the ReadMe file length issue in this sample repository

Author: vijayarasan

README.md

@@ -1,2 +1,99 @@
-# how-to-programmatically-expand-an-item-in-wpf-treeview-treeviewadv-
-This sample shows how to programmatically expand an item in wpf treeview (treeviewadv).
+# How to Programmatically Expand an Item in WPF TreeViewAdv?
+
+This sample shows how to programmatically expand an item in [WPF TreeView](https://help.syncfusion.com/wpf/classic/treeview/overview) (TreeViewAdv).
+
+`TreeViewAdv` allows to expand or collapse each node by setting [IsExpanded](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.Tools.Controls.TreeViewItemAdv.html#Syncfusion_Windows_Tools_Controls_TreeViewItemAdv_IsExpanded) property.
+
+#### XAML
+
+``` csharp
+<Grid x:Name="Grid">
+    <syncfusion:TreeViewAdv Name="treeViewAdv">
+        <syncfusion:TreeViewItemAdv Name="treeViewItemAdv" Header="Marital Status">
+            <syncfusion:TreeViewItemAdv Header="Single"/>
+            <syncfusion:TreeViewItemAdv Header="Married"/>
+            <syncfusion:TreeViewItemAdv Header="Married with Children"/>
+        </syncfusion:TreeViewItemAdv>
+        <syncfusion:TreeViewItemAdv Header="Baby Vaccines">
+            <syncfusion:TreeViewItemAdv Header="Hepatitis B"/>
+            <syncfusion:TreeViewItemAdv Header="Tetanus"/>
+            <syncfusion:TreeViewItemAdv Header="Polio"/>
+            <syncfusion:TreeViewItemAdv Header="Measles"/>
+        </syncfusion:TreeViewItemAdv>
+        <syncfusion:TreeViewItemAdv Header="Country Information"/>
+    </syncfusion:TreeViewAdv>
+</Grid>
+```
+
+#### C#
+
+``` csharp
+public MainWindow()
+{
+    InitializeComponent();
+    TreeViewAdv treeViewAdv = new TreeViewAdv();
+    TreeViewItemAdv root1 = new TreeViewItemAdv() { Header = "Marital Status" };
+    TreeViewItemAdv subitem11 = new TreeViewItemAdv() { Header = "Single" };
+    TreeViewItemAdv subitem12 = new TreeViewItemAdv() { Header = "Married" };
+    TreeViewItemAdv subitem13 = new TreeViewItemAdv() { Header = "Married with Children" };
+
+    root1.Items.Add(subitem11);
+    root1.Items.Add(subitem12);
+    root1.Items.Add(subitem13);
+
+    TreeViewItemAdv root2 = new TreeViewItemAdv() { Header = "Baby Vaccines" };
+    TreeViewItemAdv subitem21 = new TreeViewItemAdv() { Header = "Hepatitis B" };
+    TreeViewItemAdv subitem22 = new TreeViewItemAdv() { Header = "Tetanus" };
+    TreeViewItemAdv subitem23 = new TreeViewItemAdv() { Header = "Polio" };
+    TreeViewItemAdv subitem24 = new TreeViewItemAdv() { Header = "Measles" };
+
+    root2.Items.Add(subitem21);
+    root2.Items.Add(subitem22);
+    root2.Items.Add(subitem23);
+    root2.Items.Add(subitem24);
+
+    TreeViewItemAdv root3 = new TreeViewItemAdv() { Header = "Baby Vaccines" };
+    treeViewAdv.Items.Add(root1);
+    treeViewAdv.Items.Add(root2);
+    treeViewAdv.Items.Add(root3);
+    Grid.Children.Add(treeViewAdv);
+    root1.IsExpanded = true;
+}
+```
+
+#### VB
+
+``` vb
+Public Sub New()
+    InitializeComponent()
+    Dim treeViewAdv As TreeViewAdv = New TreeViewAdv()
+    Dim root1 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Marital Status"}
+    Dim subitem11 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Single"}
+    Dim subitem12 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Married"}
+    Dim subitem13 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Married with Children"}
+
+    root1.Items.Add(subitem11)
+    root1.Items.Add(subitem12)
+    root1.Items.Add(subitem13)
+
+    Dim root2 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Baby Vaccines"}
+    Dim subitem21 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Hepatitis B"}
+    Dim subitem22 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Tetanus"}
+    Dim subitem23 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Polio"}
+    Dim subitem24 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Measles"}
+
+    root2.Items.Add(subitem21)
+    root2.Items.Add(subitem22)
+    root2.Items.Add(subitem23)
+    root2.Items.Add(subitem24)
+
+    Dim root3 As TreeViewItemAdv = New TreeViewItemAdv() With {.Header = "Baby Vaccines"}
+    treeViewAdv.Items.Add(root1)
+    treeViewAdv.Items.Add(root2)
+    treeViewAdv.Items.Add(root3)
+    Grid.Children.Add(treeViewAdv)
+    root1.IsExpanded = True
+End Sub
+```
+
+![TreeView with expanded nodes](TreeViewWithExpandedNodes.png)