How can I get this to work?
Unless someone has a different solution.
Thank you for your help.
Mike
<
telerik:RadGrid
ID
=
"RadGrid1"
runat
=
"server"
DataSourceID
=
"SqlDataSource1"
>
<
MasterTableView
autogeneratecolumns
=
"False"
datakeynames
=
"id"
datasourceid
=
"SqlDataSource1"
>
<
CommandItemSettings
ExportToPdfText
=
"Export to PDF"
></
CommandItemSettings
>
<
RowIndicatorColumn
FilterControlAltText
=
"Filter RowIndicator column"
>
<
HeaderStyle
Width
=
"20px"
></
HeaderStyle
>
</
RowIndicatorColumn
>
<
ExpandCollapseColumn
FilterControlAltText
=
"Filter ExpandColumn column"
>
<
HeaderStyle
Width
=
"20px"
></
HeaderStyle
>
</
ExpandCollapseColumn
>
<
Columns
>
<
telerik:GridButtonColumn
CommandName
=
"download_file"
Text
=
"Download"
UniqueName
=
"Download"
HeaderText
=
"Download"
></
telerik:GridButtonColumn
>
<
telerik:GridBoundColumn
DataField
=
"id"
DataType
=
"System.Int32"
FilterControlAltText
=
"Filter id column"
HeaderText
=
"id"
ReadOnly
=
"True"
SortExpression
=
"id"
UniqueName
=
"id"
>
</
telerik:GridBoundColumn
>
<
telerik:GridBoundColumn
DataField
=
"file_name"
FilterControlAltText
=
"Filter file_name column"
HeaderText
=
"file_name"
SortExpression
=
"file_name"
UniqueName
=
"file_name"
>
</
telerik:GridBoundColumn
>
<
telerik:GridBoundColumn
DataField
=
"file_url"
FilterControlAltText
=
"Filter file_url column"
HeaderText
=
"file_url"
SortExpression
=
"file_url"
UniqueName
=
"file_url"
>
</
telerik:GridBoundColumn
>
</
Columns
>
<
EditFormSettings
>
<
EditColumn
FilterControlAltText
=
"Filter EditCommandColumn column"
></
EditColumn
>
</
EditFormSettings
>
</
MasterTableView
>
<
FilterMenu
EnableImageSprites
=
"False"
></
FilterMenu
>
<
HeaderContextMenu
CssClass
=
"GridContextMenu GridContextMenu_Default"
></
HeaderContextMenu
>
</
telerik:RadGrid
>
protected
void
RadGrid1_ItemCommand(
object
source, Telerik.Web.UI.GridCommandEventArgs e)
{
if
(e.CommandName ==
"download_file"
)
{
string
filename=e.CommandArgument.ToString();
string
path=MapPath(
"~/files/"
+ filename);
byte
[]bts=System.IO.File.ReadAllBytes(path);
Response.Clear();
Response.ClearHeaders();
Response.AddHeader(
"Content-Type"
,
"Application/octet-stream"
);
Response.AddHeader(
"Content-Length"
,bts.Length.ToString());
Response.AddHeader(
"Content-Disposition"
,
"attachment; filename="
+ filename);
Response.BinaryWrite(bts);
Response.Flush();
Response.End();
}
}
15 Answers, 1 is accepted
![](/forums/images/avatarimages/39919b70-532f-465f-8efd-7edb2fc108a71.jpg)
You will not be able to get the CommandArgument in the ItemCommand event without setting it.Since the sender is the GridButtonColumn, you need to set the CommandArgument in the ASPX. But here I suppose, you need the filename from the DataField 'file_name' which is bound to a BoundColumn.Please check the following code snippet to get the BoundColumn Value in the ItemCommand event.
C#:
protected
void
RadGrid1_ItemCommand(
object
sender, Telerik.Web.UI.GridCommandEventArgs e)
{
if
(e.CommandName ==
"download_file"
)
{
GridDataItem ditem = (GridDataItem)e.Item;
string
filename = ditem[
"file_name"
].Text;
// get the filename from the row in which the download button is clicked
string
path = MapPath(
"/sample/"
+ filename);
byte
[] bts = System.IO.File.ReadAllBytes(path);
Response.Clear();
Response.ClearHeaders();
Response.AddHeader(
"Content-Type"
,
"Application/octet-stream"
);
Response.AddHeader(
"Content-Length"
, bts.Length.ToString());
Response.AddHeader(
"Content-Disposition"
,
"attachment; filename="
+ filename);
Response.BinaryWrite(bts);
Response.Flush();
Response.End();
}
}
Thanks,
Shinu.
![](/forums/images/avatarimages/default.gif)
In debug mode it appears that the 'If (e.CommandName == "download_file") ' isn't being executed.
In the 'browser ' view source here is the code line:
<
a
href
=
"javascript:__doPostBack('RadGrid1$ctl00$ctl04$ctl01','')"
>Download</
a
>
![](/forums/images/avatarimages/39919b70-532f-465f-8efd-7edb2fc108a71.jpg)
Are you attaching the ItemCommand event for RadGrid? Can you please check whether the ItemCommand event is firing or not. Make sure that you have attached the ItemCommand event in ASPX/C# as follows.
ASPX:
<
telerik:RadGrid
ID
=
"RadGrid1"
runat
=
"server"
DataSourceID
=
"SqlDataSource1"
onitemcommand
=
"RadGrid1_ItemCommand"
>
OR
C#:
protected
void
Page_Load(
object
sender, EventArgs e)
{
RadGrid1.ItemCommand +=
new
GridCommandEventHandler(RadGrid1_ItemCommand);
}
void
RadGrid1_ItemCommand(
object
sender, GridCommandEventArgs e)
{
//your code
}
Thanks,
Shinu.
![](/forums/images/avatarimages/default.gif)
It's always the simple things ;-)
![](/forums/images/avatarimages/default.gif)
protected
void
RadGrid1_ItemCommand(
object
sender, GridCommandEventArgs e)
{
if
(e.CommandName ==
"download_file"
)
{
GridDataItem ditem = (GridDataItem)e.Item;
string
filename = ditem[
"DocumentoConvocatoria"
].Text;
// get the filename from the row in which the download button is clicked
string
path = MapPath(
"Admin/"
+ filename);
byte
[] bts = System.IO.File.ReadAllBytes(path);
Response.Clear();
Response.ClearHeaders();
Response.AddHeader(
"Content-Type"
,
"Application/octet-stream"
);
Response.AddHeader(
"Content-Length"
, bts.Length.ToString());
Response.AddHeader(
"Content-Disposition"
,
"attachment; filename="
+ filename);
Response.BinaryWrite(bts);
Response.Flush();
Response.End();
}
}
![](/forums/images/avatarimages/39919b70-532f-465f-8efd-7edb2fc108a71.jpg)
Please make sure that the column with UniqueName as 'DocumentoConvocatoria' looks and behaves like a Tablecell(GridBoundColumn) in the view mode.
Please elaborate your scenario if it doesn't help.
Regards,
Shinu.
![](/forums/images/avatarimages/superstar.gif)
I have saved my files in file stream and i have used a template link button in my radgrid, Now i am trying to download but not able to download that file because i have used ajax manager in my grid and that ajax manager making problem in file save popup
please check my problem as i am in big trouble
On item command
else if (e.CommandName == "DownloadFile")
{
SqlConnection objSqlCon = new SqlConnection(db.ConnectionString);
objSqlCon.Open();
SqlTransaction objSqlTran = objSqlCon.BeginTransaction();
SqlCommand objSqlCmd = new SqlCommand("up_Get_Document_File", objSqlCon, objSqlTran);
objSqlCmd.CommandType = CommandType.StoredProcedure;
SqlParameter objSqlParam1 = new SqlParameter("@FileGUID", SqlDbType.VarChar);
objSqlParam1.Value = e.CommandArgument;
objSqlCmd.Parameters.Add(objSqlParam1);
string path = string.Empty;
string FileType = string.Empty;
string FormName = string.Empty;
using (SqlDataReader sdr = objSqlCmd.ExecuteReader())
{
while (sdr.Read())
{
path = sdr[0].ToString();
FileType = sdr[1].ToString();
FormName = sdr[2].ToString();
}
}
objSqlCmd = new SqlCommand("SELECT GET_FILESTREAM_TRANSACTION_CONTEXT()", objSqlCon, objSqlTran);
byte[] objContext = (byte[])objSqlCmd.ExecuteScalar();
SqlFileStream objSqlFileStream = new SqlFileStream(path, objContext, FileAccess.Read);
byte[] buffer = new byte[(int)objSqlFileStream.Length];
objSqlFileStream.Read(buffer, 0, buffer.Length);
objSqlFileStream.Close();
objSqlTran.Commit();
FormName = FormName.Replace(";", "").Replace(",", " ");
Response.AddHeader("Content-disposition", "attachment; filename=" + Path.GetFileName(FormName) + FileType);
// Here you need to manage the download file stuff according to your need
Response.ContentType = "application/octet-stream";
Response.BinaryWrite(buffer);
Response.End();
}
and ajax have ajax manager on my aspx page
To achieve the desired functionality you can try disabling the ajax when the download link button is pressed. For example:
<
telerik:RadAjaxManager
ID
=
"RadAjaxManager1"
ClientEvents-OnRequestStart
=
"onRequestStart"
runat
=
"server"
>
…
function
onRequestStart(sender, args) {
if
(args.get_eventTarget().indexOf(
"DownloadLinkButtonID"
) >= 0)
args.set_enableAjax(
false
);
}
Please give it try and let me know if it helps you.
Regards,
Radoslav
Telerik
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.
![](/forums/images/avatarimages/default.gif)
Could you please elaborate a bit more or your scenario? Why the provided code snippet does not work in your case? Do any error occurs or unexpected results? Also could you please post your aspx markup code with the related code behind file. Thus we will be able to gather more details about your scenario and provide you with more to-the-point answer.
Looking forward for your reply.
Regards,
Radoslav
Telerik
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.
![](/forums/images/avatarimages/default.gif)
I could resolve the issue.
![](/forums/images/avatarimages/default.gif)
Radoslav,
Thank you very much, the information you posted here solved my problem.
To achieve the desired functionality you can try disabling the ajax when the download link button is pressed. For example:
<telerik:RadAjaxManager ID="RadAjaxManager1" ClientEvents-OnRequestStart="onRequestStart"
runat="server">
…
function onRequestStart(sender, args) {
if (args.get_eventTarget().indexOf("DownloadLinkButtonID") >= 0)
args.set_enableAjax(false);
}
Thanks.
![](/forums/images/avatarimages/default.gif)
Hello Shrinu,
I have written following code, which is not downloading file from Rad Grid control
<telerik:GridTemplateColumn HeaderText="Request Download" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:ImageButton ID="imgDownload" runat="server" ImageUrl="~/Apps/QMx-CSER/Images/download1.png"
CommandName="DownloadFile" Height="22px" Width="22px" ToolTip="Request Download"
CommandArgument='<%# Eval("Job_ID") %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
else if (e.CommandName == "DownloadFile")
{
int Job_ID = Convert.ToInt32(e.CommandArgument);
string AssemblyNumber = (e.Item.FindControl("lnkItemnumber") as LinkButton).Text;
string fullFileName = new SMTPMail().CreateExcel(Job_ID, AssemblyNumber, Session["User"].ToString());
string name = Path.GetFileNameWithoutExtension(fullFileName);
string extension = Path.GetExtension(fullFileName);
string fileName = name + "." + extension;
byte[] bts = System.IO.File.ReadAllBytes(fullFileName);
Response.Clear();
Response.ClearHeaders();
Response.AddHeader("Content-Type", "Application/octet-stream");
Response.AddHeader("Content-Length", bts.Length.ToString());
Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
Response.BinaryWrite(bts);
Response.Flush();
File.Delete(fullFileName);
Response.End();
}
Looking for your help on this.
Regards,
Pronobesh Mukherjee
![](/forums/images/avatarimages/default.gif)
I have written following code, which is not downloading file from Rad Grid control
<telerik:GridTemplateColumn HeaderText="Request Download" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:ImageButton ID="imgDownload" runat="server" ImageUrl="~/Apps/QMx-CSER/Images/download1.png"
CommandName="DownloadFile" Height="22px" Width="22px" ToolTip="Request Download"
CommandArgument='<%# Eval("Job_ID") %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
else if (e.CommandName == "DownloadFile")
{
int Job_ID = Convert.ToInt32(e.CommandArgument);
string AssemblyNumber = (e.Item.FindControl("lnkItemnumber") as LinkButton).Text;
string fullFileName = new SMTPMail().CreateExcel(Job_ID, AssemblyNumber, Session["User"].ToString());
string name = Path.GetFileNameWithoutExtension(fullFileName);
string extension = Path.GetExtension(fullFileName);
string fileName = name + "." + extension;
byte[] bts = System.IO.File.ReadAllBytes(fullFileName);
Response.Clear();
Response.ClearHeaders();
Response.AddHeader("Content-Type", "Application/octet-stream");
Response.AddHeader("Content-Length", bts.Length.ToString());
Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
Response.BinaryWrite(bts);
Response.Flush();
File.Delete(fullFileName);
Response.End();
}
Looking for your help on this.
Regards,
Pronobesh Mukherjee
Hi Pronobesh,
Make sure the button does not invoke a partial postback. You can only send files to the browser during a full postback. The approach shown by my colleague Radoslav should help you if you are using AJAX for this grid already.
Regards,
Telerik by Progress