I am using Entity Framework in this instance and would like to group my radgrid by a field located in another table related to the main item.  I have used an include statement to bring back the additional entity (one to one relationship between these tables) as lazy loading is enabled.  I want to group on "Title" field in my table "Activity"  The navigation property is "Activity1" so I have used the following to populate my datasource:

 _context.LEResults.Include("Activity1").Where(R => R.EmployeeID == EmployeeId && R.Active == true).OrderBy(E => E.AttemptDate).ToList();

I know this is working because I can display Activity1.Title as a regular gridboundcolumn.

I have got this to work before and actually have the other project in front of me but I cannot figure out what is different.  Is there anything anyone can think of that I may have missed?  The following code informs me that the field Activity1.Title is missing from my source table.

<GroupByExpressions>
                                    <telerik:GridGroupByExpression>
                                        <GroupByFields>
                                            <telerik:GridGroupByField FieldName="Activity1.Title" />
                                        </GroupByFields>
                                        <SelectFields>
                                            <telerik:GridGroupByField FieldName="Activity1.Title" HeaderText="Activity" />
                                        </SelectFields>
                                    </telerik:GridGroupByExpression>
</GroupByExpressions>

I have a situation where where I need to only fired the needDatasource on a boolean statment.  It works fine for what I am doing to load the page on a querystring value.  Where the grid hiccups is when I try to use the Radgrid insert, the grid disappears becuase of the boolean statment, how can I set this statement when I postback to get at my template to insert data.

i'm having an issue setting up those two parameters when the key coming from the database is arabic
this error occurred, can anyone please tell me what the best way to make my radtreeview work ?

Hi I am using a multiselect radcombobox where i am binding the data dynamically at code behind. There is a rad button too on the page. On button click event I am always getting the CheckedItems.count = 0 at code behind. However if I am adding items in radcombo at UI side, I am able to get CheckedItems.count. Please suggest is there any way to get CheckedItems.count when data is binding dynamically at code behind. 

Hi,

I am trying to Bind RadhtmlChart my column name contains '.' when this appears in the column it is throwing error,how can I handle this.

EX:

       dt.Columns.Add("id");
        dt.Columns.Add("data..."); // This contains '.' at end of column 
    
        DataRow dr = dt.NewRow();       
        dr[0] = "2011-12";
        dr[1] = "500";
        dt.Rows.Add(dr);
        ColumnSeries cs = new ColumnSeries();
        cs.LabelsAppearance.Visible = false;
        cs.Name = dt.Columns[1].ToString();
        cs.DataFieldY = dt.Columns[1].ToString();
        radChart.PlotArea.XAxis.DataLabelsField = dt.Columns[0].ToString();
      
        radChart.PlotArea.Series.Add(cs);
        radChart.PlotArea.YAxis.MinValue = 0;
       
        cs.LabelsAppearance.ClientTemplate = "#= category #";
        cs.TooltipsAppearance.DataFormatString = "{0:N0}";
        cs.TooltipsAppearance.ClientTemplate = "#= category #: #= value #";
        radChart.PlotArea.XAxis.Type = Telerik.Web.UI.HtmlChart.AxisType.Category;
        radChart.PlotArea.XAxis.LabelsAppearance.DataFormatString = "yyyy-MM";
        radChart.PlotArea.Series.Add(cs);
        radChart.PlotArea.XAxis.LabelsAppearance.Visible = true;
        radChart.DataSource = dt;
        radChart.DataBind();

Hello,
I want to change the back color Notification TitleBar.
How can i apply my own color for TitleBar?

Hi Iam having two Rad Comboboxes depending on selected value of first combobox(i.e--None Selected--) i have to display in second combobox also same text --None selected--  And vice versa...and other than --none selected-- if i selected then second combobox should show its respective data. .Please help me to solve this  problem.

Hi
I am converting to the latest controls and I am getting the following runtime error:

    intKey is neither a DataColumn nor a DataRelation for table GroupedTable0.

This code is currently working with version 2010.3.1109 of controls.  The data for the grouped grid is coming from a stored procedure via a strongly types data adapter (i.e. dataset).  I am applying a filter on the data, prior to manually binding the grid.  When I bind the grid I get the above exception.
I have added a intKey column with visibility set to false to the columns collection but that did not help.

Phil

I can't seem to bind data to a drop down tree.

Markup:

Code Behind:

I should also note, this is being called from the "ItemDataBound" event on a RadGrid [adding a new item, haven't looked at editing an existing item].  The markup lives in the EditFormTemplate of the grid. 
Any ideas?

Hello

Why in my version 2014.1.225.45, DropDownWidth="200px" or DropDownWidth="200"
doesn't work

The width it's ok : Width="240" but not the DropDownWidth

If i use the css , it's work , but i want to understand why the attributes DropDownWidth don't work


<telerik:RadComboBox runat="server" ID="PlaComboBox1" Width="240" DataSourceID="WbTA" DataTextField="TA_LIBELLE" DataValueField="TA_ID" DropDownWidth="200"></telerik:RadComboBox>

thanks
for you help