How to Enable a Checkbox in ChildRows

[Meaning Of Lights]

I've trawled the web and have exhausted troubleshooting. Despite others asking very similar questions nothing seems to allow me edit a Checkbox in a Template Column.

I've attached a screenshot and what I'm doing is possible as its shown here: http://www.telerik.com/help/winforms/gridview-hierarchical-grid-tutorial-binding-to-hierarchical-data.html

  protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            this.radGridView1.BeginUpdate();
            LoadData();
            this.radGridView1.UseScrollbarsInHierarchy = true;
            this.radGridView1.AutoExpandGroups = true;
            this.radGridView1.ShowGroupPanel = false;
            this.radGridView1.AllowAddNewRow = false;
            this.radGridView1.EndUpdate();
        }

 private void LoadData()
        {
            latestRevisions = DAL.GetTemplatesLatestRevisionsBySearchCrtieria(...);
            pastRevisions = DAL.GetTemplatesPastRevisionsBySearchCrtieria(...);

            latestRevisionsBindingSource.DataSource = latestRevisions;
            pastRevisionsBindingSource.DataSource = pastRevisions;

            radGridView1.DataSource = latestRevisionsBindingSource;

            radGridView1.MasterGridViewTemplate.Columns["Name"].Width = 150; 
            radGridView1.MasterGridViewTemplate.Columns["TemplateID"].IsVisible = false;
            radGridView1.MasterGridViewTemplate.Columns["ParentTemplateID"].IsVisible = false;
            radGridView1.MasterGridViewTemplate.Columns["Description"].Width = radGridView1.Width - twoHundred;
            radGridView1.MasterGridViewTemplate.Columns["ImagePreview"].IsVisible = false;

            foreach (GridViewDataColumn column in this.radGridView1.Columns)
            {
                column.ReadOnly = (column.Name != "Compare");
            }

            LoadDetailsTable();
        }

        void LoadDetailsTable()
        {
            GridViewTemplate template = new GridViewTemplate();
            template.Caption = "Latest Revisions";
            template.DataSource = pastRevisions;
            template.AllowRowResize = false;
            template.ShowColumnHeaders = false;
            template.Columns["ImagePreview"].Width = 100;
            template.ReadOnly = true;

            template.Columns["Description"].Width = 245;
            template.Columns["Description"].DisableHTMLRendering = false;

            template.Columns["Compare"].Width = 60;
            template.Columns["Compare"].ReadOnly = false;   //<-- Read-Only is false!!!

            this.radGridView1.Templates.Insert(0, template);
            
            GridViewRelation relation = new GridViewRelation(this.radGridView1.MasterTemplate);
            relation.ChildTemplate = template;
            relation.ParentColumnNames.Add("TemplateID");
            relation.ChildColumnNames.Add("ParentTemplateID");
            this.radGridView1.Relations.Add(relation);

            HtmlViewDefinition viewDef = new HtmlViewDefinition();
            viewDef.RowTemplate.Rows.Add(new RowDefinition());
            viewDef.RowTemplate.Rows.Add(new RowDefinition());

            viewDef.RowTemplate.Rows[0].Cells.Add(new CellDefinition("ImagePreview", 0, 1, 2));
            viewDef.RowTemplate.Rows[0].Cells.Add(new CellDefinition("Description", 0, 1, 2));
            viewDef.RowTemplate.Rows[0].Cells.Add(new CellDefinition("Compare", 0, 1, 2));
            template.ViewDefinition = viewDef;
        }

private void radGridView1_SelectionChanged(object sender, EventArgs e)
        {
            if (prevRow != null)
                prevRow.Cells["Compare"].Value = false;
            prevRow = this.radGridView1.SelectedRows[0];
            this.radGridView1.Columns["Compare"].ReadOnly = false;
            this.radGridView1.SelectedRows[0].Cells["Compare"].ReadOnly = false;
            this.radGridView1.SelectedRows[0].Cells["Compare"].Value = true;         /<- Throws an Error "Column 'Compare' is read only.!!!
        }

If anyone could tell me how to fix this it would be much appreciated. I've spent two days on this now.

[Meaning Of Lights]

I found the problem.

In my SQL I was adding a bit column called Compare

SELECT TemplateID,ParentTemplateID,Name, [Description], ImagePreview,0 as Compare....

Here is a repro of the successful implementation:

public partial class Form1 : Form
  {
      public Form1()
      {
          InitializeComponent();
      }

      protected override void OnLoad(EventArgs e)
      {
          base.OnLoad(e);

          this.radGridView1.BeginUpdate();

          LoadData();

          this.radGridView1.UseScrollbarsInHierarchy = true;
          this.radGridView1.ReadOnly = false;
          this.radGridView1.AutoExpandGroups = true;
          this.radGridView1.ShowGroupPanel = false;
          this.radGridView1.AllowAddNewRow = false;

          this.radGridView1.EndUpdate();
      }

      private void LoadData()
      {
          DataTable dtParent = new DataTable();
          DataTable dtChild = new DataTable();

          dtParent.Columns.Add("TemplateID", typeof(int));
          dtParent.Columns.Add("ParentTemplateID", typeof(int));
          dtParent.Columns.Add("Name");
          dtParent.Columns.Add("Description");
          dtParent.Columns.Add("ImagePreview",typeof(Image));
          dtParent.Columns.Add("Compare", typeof(bool));

          DataRow dr = dtParent.NewRow();
          dr["TemplateID"] = 43;
          dr["ParentTemplateID"] = 0;
          dr["Name"] = "The Name";
          dr["Description"]= "The Description";

          dtParent.Rows.Add(dr);


          dtChild.Columns.Add("TemplateID", typeof(int));
          dtChild.Columns.Add("ParentTemplateID", typeof(int));
          dtChild.Columns.Add("Name");
          dtChild.Columns.Add("Description");
          dtChild.Columns.Add("ImagePreview", typeof(Image));
          dtChild.Columns.Add("Compare", typeof(bool));

          DataRow dr1 = dtChild.NewRow();
          dr1["TemplateID"] = 44;
          dr1["ParentTemplateID"] = 43;
          dr1["Name"] = "Testing 1";
          dr1["Description"] = "Testing 1";
          dr1["ImagePreview"] = Image.FromFile(@"C:\Users\Public\Pictures\Sample Pictures\Desert.jpg");
          dr1["Compare"] = false;
          dtChild.Rows.Add(dr1);

          dr1 = dtChild.NewRow();
          dr1["TemplateID"] = 45;
          dr1["ParentTemplateID"] = 43;
          dr1["Name"] = "Testing 2";
          dr1["Description"] = "Testing 2";
          dr1["ImagePreview"] = Image.FromFile(@"C:\Users\Public\Pictures\Sample Pictures\Desert.jpg");
          dr1["Compare"] = false;
          dtChild.Rows.Add(dr1);

          using (this.radGridView1.DeferRefresh())
          {
              this.radGridView1.MasterTemplate.Reset();

              radGridView1.DataSource = dtParent;

              radGridView1.MasterGridViewTemplate.Columns["Name"].Width = 150;
              radGridView1.MasterGridViewTemplate.Columns["Description"].Width = 650;
              radGridView1.MasterGridViewTemplate.Columns["TemplateID"].IsVisible = false;
              radGridView1.MasterGridViewTemplate.Columns["ParentTemplateID"].IsVisible = false;
              radGridView1.MasterGridViewTemplate.Columns["Compare"].IsVisible = false;
              radGridView1.MasterGridViewTemplate.Columns["ImagePreview"].IsVisible = false;

              foreach (GridViewDataColumn column in this.radGridView1.Columns)
              {
                  column.ReadOnly = (column.Name != "Compare");
              }
          }
          LoadDetailsTable(dtChild);
      }

      private  void LoadDetailsTable(DataTable dtchild)
      {
          GridViewTemplate template = new GridViewTemplate();
          template.Caption = "Latest Revisions";
          template.DataSource = dtchild;
          template.AllowRowResize = false;
          template.ShowColumnHeaders = false;
          template.Columns["ImagePreview"].Width = 100;
          template.AllowAddNewRow = false;

          template.Columns["Description"].Width = 245;
          template.Columns["Description"].ReadOnly = true;
          template.Columns["Description"].DisableHTMLRendering = false;
          template.Columns["Description"].WrapText = true;

          template.Columns["Compare"].Width = 60;
          template.Columns["Compare"].ReadOnly = false;

          this.radGridView1.Templates.Insert(0, template);

          GridViewRelation relation = new GridViewRelation(this.radGridView1.MasterTemplate, template);
          relation.ChildTemplate = template;
          relation.ParentColumnNames.Add("TemplateID");
          relation.ChildColumnNames.Add("ParentTemplateID");
          this.radGridView1.Relations.Add(relation);

          HtmlViewDefinition viewDef = new HtmlViewDefinition();
          viewDef.RowTemplate.Rows.Add(new RowDefinition());

          viewDef.RowTemplate.Rows[0].Cells.Add(new CellDefinition("ImagePreview", 0, 1, 1));
          viewDef.RowTemplate.Rows[0].Cells.Add(new CellDefinition("Description", 0, 1, 1));
          viewDef.RowTemplate.Rows[0].Cells.Add(new CellDefinition("Compare", 0, 1,1));
          template.ViewDefinition = viewDef;

          SetupFiltering(radGridView1.MasterTemplate, true);
      }

      private void SetupFiltering(GridViewTemplate template, bool enableFiltering)
      {
          template.EnableFiltering = enableFiltering;

          for (int i = 0; i < template.Templates.Count; i++)
          {
              SetupFiltering(template.Templates[i], enableFiltering);
          }
      }
      private void radGridView1_ChildViewExpanded(object sender, ChildViewExpandedEventArgs e)
      {
          for (int j = 0; j < e.ChildViewInfo.Rows.Count; j++)
          {
              e.ChildViewInfo.Rows[j].Height = 100;
          }
      }

  }

[George]

Hello Jeremy,

Thank you for sharing your solution with the community, I am sure someone will find it helpful.

If you have any other questions or comments, please let me know.
 
Regards,
George
Telerik