I am using this code in my handler.ashx file

public void ProcessRequest(HttpContext context)
{
Context = context;
string filePath = context.Request.QueryString["path"];
filePath = context.Server.MapPath(filePath);
if (filePath == null)
{
return;
}
System.IO.StreamReader streamReader = new System.IO.StreamReader(filePath);
System.IO.BinaryReader br = new System.IO.BinaryReader(streamReader.BaseStream);
byte[] bytes = new byte[streamReader.BaseStream.Length];
br.Read(bytes, 0, (int)streamReader.BaseStream.Length);
if (bytes == null)
{
return;
}
streamReader.Close();
br.Close();
string extension = System.IO.Path.GetExtension(filePath);
string fileName = System.IO.Path.GetFileName(filePath);
if (extension == ".jpg")
{ // Handle *.jpg and
  WriteFile(bytes, fileName, "image/jpeg", context.Response);
}
else if (extension == ".gif")
{// Handle *.gif
WriteFile(bytes, fileName, "image/gif gif", context.Response);
}
else if (extension == ".pdf")
{// Handle *.pdf
WriteFile(bytes, fileName, "application/pdf pdf", context.Response);
}
}
/// <summary>
/// Sends a byte array to the client
/// </summary>
/// <param name="content">binary file content</param>
/// <param name="fileName">the filename to be sent to the client</param>
/// <param name="contentType">the file content type</param>
private void WriteFile(byte[] content, string fileName, string contentType, HttpResponse response)
{
response.Buffer = true;
response.Clear();
response.ContentType = contentType;
response.AddHeader("content-disposition", "attachment; filename=" + fileName);
response.BinaryWrite(content);
response.Flush();
response.End();
}
public bool IsReusable
{
get
{
return false;
}
}

It doesn't work for JPEG files. It just opens a blank page.

What am I doing wrong?

Dear team,

I have a radcombobox which fetches around 10000 items, below is the markup 

                              <telerik:RadComboBox ID="ddlProducts" runat="server"
                                AppendDataBoundItems="true" TabIndex="1"
                                Filter="Contains" Skin="MetroTouch" RenderMode="Auto" 
                                EnableLoadOnDemand="true" ShowMoreResultsBox="true" Width="100%" Height="400px" OnClientBlur="Product_OnClientBlur"
                                EnableVirtualScrolling="true" OnClientItemsRequesting="GetActiveProducts" OnClientDropDownClosed="onDropDownClosed">
                                <WebServiceSettings Method="GetActiveProducts" Path="~/Inventory/WebServices/InventoryWebService.asmx" />
                                
                            </telerik:RadComboBox>

Every this is working perfectly in desktop browser , the issue is with mobile device .

When we type in the keywords and the dropdownlist is populated with records and starts scrolling then in mobile device the page starts scrolling and when the page scroll reach the end then only the dropdownlist og combobox starts scrolling.

How to avoid this , Please advice

Please find the attached screenshot for this behaviour.

Thanks & Regards

Sushanth.B

I have a radgrid hierarchy structure.  When the user navigates to the third level and clicks on the parent tickmark on the grid, the RadGrid1_ItemCommand is fired and I can retrieve the parent "ProgramID". 

But I need to pickup the parentID when the user clicks on the command-template button located just on top of the detail rows.  I would like to get the value within a client-side function or server-side if that is easier??? (but cannot get that to work well).  See attachment for a jpg of grid...

Thank you for you help with this request!

Client-Side code:

function openConfirmationWindowNEW(sender, args) {

    var programID= parentItem.OwnerTableView.Items[sender.Item.ItemIndex].GetDataKeyValue("ProgramID");          

    radopen("Storyboard.aspx?carID=programID, "RadWindow2");

}

Server-Side Code:

console.write((string) sender.Item.OwnerTableView.Items[e.Item.ItemIndex].GetDataKeyValue("ProgramID").ToString());

The code works below but it needs it to work from within a client-side function....

protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)
        {

            if (e.Item.OwnerTableView.DataSourceID == "SqlDataSource3")
            {
                GridDataItem parentItem = (GridDataItem)(e.Item.OwnerTableView.ParentItem);
                if (parentItem != null)
                {
                    //..tier 2 parent
                    Console.Write(parentItem.OwnerTableView.DataKeyValues[parentItem.ItemIndex]["StrategicInitID"]);

                    //..tier 3 parent
                    HiddenProgramIDSelected.Value = (string)e.Item.OwnerTableView.Items[e.Item.ItemIndex].GetDataKeyValue("ProgramID").ToString();

                }
            }
    }

    

Hey guys,

 Is there a quick way to set the alternate row color based on a column value? For example: if I have 10 rows, and the first 3 belong to user ABC, next 5 belong to DEF and last 2 belong to GHI, Instead of having every row alternate, I'd like for the rows belonging to user ABC behave as NormalItem, then the rows belonging to DEF user as AlternatingItem and for GHI again as NormalItem.

This whole expected behaviour of Normal and AlternatingItem conflicts with the odd/even rules as per this doc but business rules win the case every time.

I can add some logic in the ItemDataBound event and set the CSS classes there, but am wondering if there is a better/efficient way to do it.

Good afternoon, I believe we have a bug in the Rad Grid.

I have the following code to display a grid with a date field formatted a {0:d}. Being in Australia this begins correctly in d/MM/yyyy format, but as soon as you scroll (the scond click does it) the format changes to MM/dd/yyyy (american date format). Setting virtualization to false cures it. Setting the format explicitly cures it, but as we have an international application I don't want to do that. There are no OnScroll events on the page or server that I have added. Any ideas?

<telerik:RadGrid ID="dgSessions" runat="server"  AutoGenerateColumns="false"
            AllowSorting="true" GroupingEnabled="false" 
            EnableHeaderContextMenu="true" AllowPaging="true" PageSize="1000" OnNeedDataSource="dgSessions_NeedDataSource">
                
            <MasterTableView TableLayout="Auto">
                <Columns>
                     <telerik:GridDateTimeColumn UniqueName="SessionKey" HeaderText="" DataField="SessionKey" DataFormatString="<a target='_blank' href='SessionDetails.aspx?sessionkey={0}'>View</a>" ReadOnly="True" ShowSortIcon="False" ShowFilterIcon="False">
                    </telerik:GridDateTimeColumn>

                    <telerik:GridDateTimeColumn UniqueName="Date" HeaderText="Date" DataField="StartTime" DataFormatString="{0:d}" ReadOnly="True" >
                    </telerik:GridDateTimeColumn>

                    <telerik:GridBoundColumn UniqueName="StartTime" HeaderText="Start" DataField="StartTime" DataFormatString="{0:HH:mm}" ReadOnly="True" AllowFiltering="False" ShowSortIcon="False" ShowFilterIcon="False">
                    </telerik:GridBoundColumn>
                   
                </Columns>
            </MasterTableView>
            <ClientSettings ReorderColumnsOnClient="true" AllowColumnsReorder="true" ColumnsReorderMethod="Reorder">
                <Virtualization EnableVirtualization="True" InitiallyCachedItemsCount="20000"
                    LoadingPanelID="RadAjaxLoadingPanel1" ItemsPerView="20"/>
                <Scrolling AllowScroll="true" UseStaticHeaders="true" />
                <Resizing AllowColumnResize="True" EnableRealTimeResize="True" ResizeGridOnColumnResize="False" AllowResizeToFit="True"></Resizing>
                <ClientEvents OnGridCreated="GridCreated" />
            </ClientSettings>
            <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>

        </telerik:RadGrid>

I use a RadAutoCompleteBox with DataScouceID set inside an InsertItemTemplate of a RadGrid. When clicking on add-record button i got a 'DataSource not set' exception. I have to use the OnDataSourceSelect function to manually control the amount of data. It seems that the databounding has to be earlier. I tried to set the DataSource in the ItemCreate event on the RadGrid, and do not use the DataScouceID property. But in this case, I got an ReadOnlyDataSource in the OnDataSourceSelect event passed and the solution provided below does not work any more. 

Could you please tell me what to do in order to keep the function txtSciMapUser_DataSourceSelect as it is?

Thanks a lot.