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UploadedFiles returns 0 files

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AsyncUpload
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TelDev
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TelDev asked on 22 Nov 2013, 09:54 AM
Hi,

I am using asyncupload for storing files into database.

I have 2 grids and a upload control and a save to database button. The selection of a row from 1st grid selects rows from 2nd grid. After this, a file is uploaded using asyncupload. Now by clicking the submit button I want to save the grid selections and the file to database.
I have attached a PostbackTriggers property to asyncupload  control because when i upload a file and change the selection in first grid the file is gone because of postback. If i remove PostbackTriggers property UploadedFiles count is not zero.

The UploadedFiles of asyncupload is always returning 0 files when i use PostbackTriggers.
I have attached an image to describe the controls.

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Shinu
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answered on 25 Nov 2013, 03:11 AM
Hi TelDev,

Please have a look into the following code snippet to get the count of UploadedFiles of RadAsyncUpload.

ASPX:
<telerik:RadAsyncUpload ID="RadAsyncUpload1" runat="server" PostbackTriggers="RadButton1"
    OnFileUploaded="RadAsyncUpload1_FileUploaded">
</telerik:RadAsyncUpload>
<telerik:RadButton ID="RadButton1" runat="server" Text="Save UploadedFile">
</telerik:RadButton>
<telerik:RadButton ID="RadButton2" runat="server" Text="Page PostBack">
</telerik:RadButton>

C#:
protected void RadAsyncUpload1_FileUploaded(object sender, Telerik.Web.UI.FileUploadedEventArgs e)
{
    // when RadButton1 Click is happening this event will execute
    int count = RadAsyncUpload1.UploadedFiles.Count;
}

Thanks,
Shinu.
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TelDev
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answered on 25 Nov 2013, 08:09 AM
Thanks Shinu for the reply,

I need UploadedFiles in some button event, but not in  RadAsyncUpload1_FileUploaded.
As you see in my attached image, I need the UploadedFiles count and the file in "Apply" button click.

Thanks
TelDev
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Shinu
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answered on 26 Nov 2013, 02:46 AM
Hi TelDev,

Please have a look into the following code snippet to get the count and file name of the uploaded file in RadButton OnClick event.

ASPX:
<telerik:RadAsyncUpload ID="RadAsyncUpload1" runat="server" PostbackTriggers="RadButton1">
</telerik:RadAsyncUpload>
<telerik:RadButton ID="RadButton1" runat="server" Text="Apply" OnClick="RadButton1_Click">
</telerik:RadButton>
<telerik:RadButton ID="RadButton2" runat="server" Text="Page PostBack">
</telerik:RadButton>

C#:
protected void RadButton1_Click(object sender, EventArgs e)
{
    string[] uplodedfile = new string[20];
    //count of the uploaded file
    int count = RadAsyncUpload1.UploadedFiles.Count;
    int i=0;
    foreach (UploadedFile file in RadAsyncUpload1.UploadedFiles)
    {
        //filename of the uploaded file
        uplodedfile[i] = file.FileName;
        i++;
    }
}

Thanks,
Shinu.
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TelDev
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answered on 26 Nov 2013, 09:04 AM
Thank you again Shinu,

My case is bit different. If you see the attached image I have 2 grids and a upload control. I need a postbacktrigger for grid1 and also apply button.

Can I use 2 controls for postbacktriggers property?

I have found the documentation, it seems I can set multiple controls.

http://www.telerik.com/help/aspnet-ajax/asyncupload-persist-uploaded-files.html

Thanks
TelDev
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Shinu
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answered on 27 Nov 2013, 07:11 AM
Hi TelDev,

It is possible to set more than one control in the PostbackTriggers property of RadAsyncUpload. Please have a look into the following code snippet to set two controls in PostbackTriggers property.

ASPX:
<telerik:RadGrid ID="RadGrid1" AllowPaging="true" runat="server" DataSourceID="SqlDataSource1"
    AutoGenerateColumns="true">
    <MasterTableView>
        <Columns>
            <telerik:GridBoundColumn HeaderText="OrderID" DataField="OrderID" UniqueName="OrderID">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn HeaderText="CustomerID" DataField="CustomerID" UniqueName="CustomerID">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn HeaderText="ShipName" DataField="ShipName" UniqueName="ShipName">
            </telerik:GridBoundColumn>
        </Columns>
    </MasterTableView>
</telerik:RadGrid>
<telerik:RadButton ID="RadButton1" runat="server" Text="Apply" OnClick="RadButton1_Click">
</telerik:RadButton>
<telerik:RadAsyncUpload ID="RadAsyncUpload1" runat="server" PostbackTriggers="RadButton1,RadGrid1">
</telerik:RadAsyncUpload>

Thanks,
Shinu.

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TelDev
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