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Jan 12, 2013

Populating TreeView Control from XML file

The blog post demonstrates how to populate TreeView Control using XML file in C#.NET.

The TreeView control has a Nodes collection with root TreeNode objects. Each TreeNode in turn has its own Nodes collection that holds more than one child TreeNode.

<TreeNode object>.Nodes.Add (TreeNode node) method adds a new TreeNode element with a specified text to the end of the current TreeNode collection.

Step 1: Variables Declaration
DataSet set = new DataSet();  //To store Tables from XML Document

TreeNode parent;              //store Main Table Names
TreeNode child;               //store Contents of Main Table
Listing 1

Step 2: XML file contents tables as shown in below format.
      <Customer CustID="202" Name="Pratik Ghanwat" Contact="8657413501"/>
      <Customer CustID="203" Name="Sohan Dal"      Contact="9746292005"/>
      <Customer CustID="204" Name="Sujit Dalvi"    Contact="8855572178"/>
      <Customer CustID="205" Name="Sushant Shinde" Contact="9835621704"/>
            <Customer CustID="206" Name="Amey Kulkarni"  Contact="9845671203"/>
Listing 2

Step 3: Now retrieve the values from XML File and add it to the Nodes Collection of TreeView Control.
//Read Contents of XML Document

for (int i = 0; i < set.Tables.Count; i++) 
      //Get the Name of Main Table
      parent = treeView1.Nodes.Add(set.Tables[i].TableName);

      //Get Contents of Main Table
      for (int j = 1; j < set.Tables[i].Rows.Count; j++) 
                    child = parent.Nodes.Add(set.Tables[i].Rows[j][2].ToString());
Listing 3

Intended Result:

Figure 1: Output


In this writing, we learned how to populate content from XML file to TreeView Control in C#.


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