Setting the Grid View to Unbound Mode.

[A2H]

Hi,
I am new to GridView control for Windows Application.

I have some doubts.

How to apply theme to a Grid View.
Problem I am facing: When I apply themes to grid,outer border  are disapperaing and + symbol for expanding and collapsing Hierarchial grid is changing to some different control.Its make my grid looks odd.

How to set a GridView in Unbound Mode.
Which one will be the default mode for GridView.

Thanks,
A2H

[Richard Slade]

Hi A2H, 

These links should help. 
The first one is for RadGridView in Unbound Mode
And this one tell you about theming the RadGridView

Which theme are you using that looks odd? If you follow the tutorial and have further issues, let me know. If you can post a screenshot of the issue, that would be great. 
Thanks
Richard

[A2H]

Hi,
I have followed your hyperlink for Grid View in Unbound mode.

Its help to populate the data in Master Grid.

But For Child Grid I am facing one issue.I have modified the code in the hyperlink according to my scenario.

 

private

 

void LoadUnboundData()

 

{

 

DataTable dttable1 = populateMasterGrid();

 

 

DataTable dttable2 = populateChildGrid();

 

 

GridViewTemplate template = radgridview1.MasterGridViewTemplate.ChildGridViewTemplates[0];

 

 

for (int i = 0; i < dttable1 .Rows.Count; i++)

 

{

radgridview1.MasterGridViewTemplate.Rows.Add(dttable1 .Rows[i].ItemArray[0].ToString(), dttable1 .Rows[i].ItemArray[1].ToString(), dttable1 .Rows[i].ItemArray[2].ToString(),

dttable1 .Rows[i].ItemArray[3].ToString(), dttable1 .Rows[i].ItemArray[4].ToString());

 

string strExpr;

 

 

// Setup Filter

 

 

 

 

strExpr =

"dttable2value= " + dttable1 .Rows[i].ItemArray[0].ToString();

 

 

DataRow[] dRow = dttable2 .Select(strExpr);

 

 

for (int j = 0; j < dRow.Count(); j++)

 

{

template.Rows.Add(dttable2 .Rows[i].ItemArray[0].ToString(), dttable2 .Rows[i].ItemArray[1].ToString(), dttable2 .Rows[i].ItemArray[2].ToString(), dttable2 .Rows[i].ItemArray[3].ToString());

}

}

}

 

Here the problem I am facing is duplicates values are getting populated in child grid.

Please help what I doing wrong over here.

Many Thanks,
A2H

[Richard Slade]

Please can you post a screenshot of the problem? 
Thanks
Richard

[Emanuel Varga]

Hello A2H,

Please see this example of using UnboundMode:

using System.Data;
using System.Windows.Forms;
using Telerik.WinControls.UI;

public partial class Form1 : Form
{
    private RadGridView radGridView1;

    public Form1()
    {
        InitializeComponent();
        this.radGridView1 = new RadGridView();
        this.Controls.Add(radGridView1);

        this.radGridView1.Dock = DockStyle.Fill;
        this.radGridView1.ReadOnly = false;
        this.radGridView1.AllowAddNewRow = true;

        this.radGridView1.AutoGenerateHierarchy = true;

        var column = new GridViewDecimalColumn("Id");
        radGridView1.MasterTemplate.Columns.Add(column);
        GridViewTextBoxColumn textColumn = new GridViewTextBoxColumn("Name");
        textColumn.Width = 150;
        radGridView1.MasterTemplate.Columns.Add(textColumn);

        //setup the child template
        GridViewTemplate template = new GridViewTemplate();
        template.AllowAddNewRow = true;
        template.Columns.Add(new GridViewDecimalColumn("Id"));
        template.Columns.Add(new GridViewDecimalColumn("ParentId"));
        template.Columns.Add(new GridViewTextBoxColumn("Name"));
        template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
        radGridView1.MasterTemplate.Templates.Add(template);

        //create the relation
        GridViewRelation relation = new GridViewRelation(radGridView1.MasterTemplate);
        relation.ChildTemplate = template;
        relation.RelationName = "ParentChild";
        relation.ParentColumnNames.Add("Id");
        relation.ChildColumnNames.Add("ParentId");
        radGridView1.Relations.Add(relation);

        radGridView1.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
        LoadUnboundData();
    }

    private void LoadUnboundData()
    {
        DataTable dttable1 = PopulateMasterGrid();
        DataTable dttable2 = PopulateChildGrid();

        GridViewTemplate childTemplate = radGridView1.MasterTemplate.Templates[0];

        for (int i = 0; i < dttable1.Rows.Count; i++)
        {
            radGridView1.Rows.Add(dttable1.Rows[i].ItemArray[0], dttable1.Rows[i].ItemArray[1]);
            var strExpr = "ParentId= " + dttable1.Rows[i].ItemArray[0];

            DataRow[] dRow = dttable2.Select(strExpr);

            for (int j = 0; j < dRow.Length; j++)
            {
                childTemplate.Rows.Add(dttable2.Rows[i].ItemArray[0], dttable2.Rows[i].ItemArray[1], dttable2.Rows[i].ItemArray[2]);
            }
        }
    }

    private DataTable PopulateMasterGrid()
    {
        var table = new DataTable();
        table.Columns.Add("Id");
        table.Columns.Add("Name");

        for (int i = 0; i < 10; i++)
        {
            var row = table.NewRow();
            row[0] = i;
            row[1] = "Name" + i;
            table.Rows.Add(row);
        }

        return table;
    }

    private DataTable PopulateChildGrid()
    {
        var table = new DataTable();
        table.Columns.Add("Id");
        table.Columns.Add("ParentId");
        table.Columns.Add("Name");

        for (int i = 0; i < 10; i++)
        {
            var row = table.NewRow();
            row[0] = i + 10;
            row[1] = i;
            row[2] = "ChildName" + i;
            table.Rows.Add(row);
        }

        return table;
    }
}

This works as expected, 1 child / row.

I'm guessing that there is somewhere a problem in the populateChildGrid method, duplicates are somehow created there?

Hope this helps, if you have any other questions or comments, please let me know,

Best Regards,
Emanuel Varga