Hello Vidhya,
Thank you for writing.
In order to create a hierarchical view for two related data source objects (e.g DataTables connected via "Id" and "ParentId" columns), all you need to do is to set up a parent
GridViewTemplate and a child
GridViewTemplate. Then add the child
GridViewTemplate in the parent GridViewTemplate.
Templates collection. The last necessary thing is to create a
GridViewRelation specifying the parent/child template and add this relation in the RadGridView.
Relations collection. Our
Binding to Hierarchical Data Programmatically help article is useful about this topic. Here is a sample code snippet, demonstrating how to set up a 10 level hierarchy:
int level = 10;
Random rand = new Random();
int currentLevel = 0;
public Form1()
{
InitializeComponent();
DataTable masterDt = new DataTable();
masterDt.Columns.Add("Id", typeof(int));
masterDt.Columns.Add("ParentId", typeof(int));
masterDt.Columns.Add("Title", typeof(string));
for (int j = 0; j < 2; j++)
{
masterDt.Rows.Add(j, 0, "Parent." + currentLevel + "." + j);
}
this.radGridView1.MasterTemplate.DataSource = masterDt;
this.radGridView1.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
CreateInnerTemplate(this.radGridView1.MasterTemplate, currentLevel);
}
private void CreateInnerTemplate(GridViewTemplate parentTemplate, int currentLevel)
{
if (currentLevel < level)
{
DataTable dt = new DataTable();
dt.Columns.Add("Id", typeof(int));
dt.Columns.Add("ParentId", typeof(int));
dt.Columns.Add("Title", typeof(string));
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 10; j++)
{
dt.Rows.Add(j, i, "Child." + currentLevel + "." + j);
}
}
GridViewTemplate firstChildtemplate = new GridViewTemplate();
firstChildtemplate.DataSource = dt;
firstChildtemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
parentTemplate.Templates.Add(firstChildtemplate);
GridViewRelation relation = new GridViewRelation(parentTemplate);
relation.ChildTemplate = firstChildtemplate;
relation.RelationName = "MasterParent";
relation.ParentColumnNames.Add("Id");
relation.ChildColumnNames.Add("ParentId");
radGridView1.Relations.Add(relation);
CreateInnerTemplate(firstChildtemplate, ++currentLevel);
}
}
Note that this is just a sample which purpose is to demonstrate the approach and it may not cover all possible cases. Feel free to modify it on a way which suits your requirement best.
I hope this information helps. Should you have further questions, I would be glad to help.
Regards,
Desislava
Telerik
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