Get file path to the uploaded file using Async Upload inside RadGrid

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  1. E1198842-E431-4E0B-AC3C-FF0B08924D37
    E1198842-E431-4E0B-AC3C-FF0B08924D37 avatar
    6 posts
    Member since:
    Sep 2017

    Posted 21 Nov 2017 Link to this post

    Requirements

    Telerik Product and Version

    		 3.5+

    Supported Browsers and Platforms

    		 All browsers supported by Telerik UI for ASP .NET AJAX

    Components/Widgets used (JS frameworks, etc.)

    		 C#

    PROJECT DESCRIPTION 
    An example code to get the file path to the uploaded file using Async Upload inside RadGrid.
    Supports Insert, Update and Delete features.

    AsyncUpload with RadGrid

    This scenario contains a RadGrid control that has data bound to it using Declarative DataSource and is using Form Template Edit Form. The FormTemplate contains a RadAsyncUpload control together with an Insert/Update button.

    Markup

    <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" Width="100%"
        runat="server" AutoGenerateColumns="False" AllowSorting="True" PageSize="3"
        DataSourceID="SqlDataSource1"
        OnInsertCommand="RadGrid1_InsertCommand"
        OnUpdateCommand="RadGrid1_UpdateCommand"
        OnDeleteCommand="RadGrid1_DeleteCommand">
     
        <MasterTableView AutoGenerateColumns="false" CommandItemDisplay="Top" DataSourceID="SqlDataSource1" DataKeyNames="FileID,FilePath,FileName">
            <Columns>
                <telerik:GridEditCommandColumn UniqueName="EditColumn"></telerik:GridEditCommandColumn>
                 <telerik:GridBoundColumn DataField="FileName" ReadOnly="True"
                    FilterControlAltText="Filter FileName column" HeaderText="FileName"
                    SortExpression="FileName" UniqueName="FileName">
                </telerik:GridBoundColumn>
     
                <telerik:GridBoundColumn DataField="FileID" DataType="System.Int32"
                    FilterControlAltText="Filter FileID column" HeaderText="FileID"
                    ReadOnly="True" SortExpression="FileID" UniqueName="FileID" Display="false">
                </telerik:GridBoundColumn>
     
                <telerik:GridImageColumn UniqueName="ImageColumn" HeaderText="Image" DataImageUrlFields="FilePath">
     
                </telerik:GridImageColumn>
     
                <telerik:GridHyperLinkColumn SortExpression="FilePath" DataTextFormatString="{0}"
                    DataNavigateUrlFields="FilePath" UniqueName="FilePath"
                    HeaderText="File Path" DataTextField="FilePath">
                </telerik:GridHyperLinkColumn>
                <telerik:GridButtonColumn CommandName="Delete" ButtonType="FontIconButton"></telerik:GridButtonColumn>
            </Columns>
            <EditFormSettings EditFormType="Template">
                <FormTemplate>
                    <telerik:RadAsyncUpload TargetFolder="Files" OnFileUploaded="RadAsyncUpload1_FileUploaded" ID="RadAsyncUpload1" runat="server">
                    </telerik:RadAsyncUpload>
     
                    <asp:Button ID="Button1" runat="server" Text='<%# Container is IGridInsertItem ? "Insert" : "Update"  %>' CommandName='<%# Container is IGridInsertItem ? "PerformInsert" : "Update"  %>' />
                </FormTemplate>
            </EditFormSettings>
        </MasterTableView>
        <ClientSettings>
        </ClientSettings>
    </telerik:RadGrid>
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>" SelectCommand="SELECT * FROM [PickupFiles]"></asp:SqlDataSource>

    Code Behind (C#)

    In order to prevent overwriting files with the same name, save the file with the name containing a timestamp. This can be done using the FileUploaded event of RadAsyncUplaod. The new file name has been saved in a property for future use.
    protected void RadAsyncUpload1_FileUploaded(object sender, FileUploadedEventArgs e)
    {
        if ((sender as RadAsyncUpload).UploadedFiles.Count > 0)
        {
            newFileName = e.File.GetNameWithoutExtension() + User.Identity.Name.Replace("\\", String.Empty) + "_" + DateTime.Now.ToString("ddMMyyyyHHmmssffff") + e.File.GetExtension();
            e.File.SaveAs(Path.Combine(Server.MapPath("Files"), newFileName));
        }
    }

    InsertCommand event handler
    protected void RadGrid1_InsertCommand(object sender, GridCommandEventArgs e)
    {
        // reference the AsyncUpload
        RadAsyncUpload upload = e.Item.FindControl("RadAsyncUpload1") as RadAsyncUpload;
        if (upload.UploadedFiles.Count > 0) // Verify if it has files uploaded
        {
            string updateQuery = "INSERT INTO PickupFiles (FilePath, FileName) VALUES(@FilePath, @FileName)"; // Prepare the update query
     
            using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
            {
                using (SqlCommand comm = new SqlCommand(updateQuery, conn))
                {
                    string FullPathToApplication = Request.PhysicalApplicationPath;
                    string FullPathToFiles = Server.MapPath("Files/" + newFileName).Replace(FullPathToApplication, string.Empty).Replace("\\", "/");
     
                    comm.Parameters.Add(new SqlParameter("FilePath", "~/" + FullPathToFiles.ToString()));
                    comm.Parameters.Add(new SqlParameter("FileName", newFileName));
     
                    conn.Open();
                    comm.ExecuteNonQuery();
                }
            }
        }
    }

    UpdateCommand event handler
    protected void RadGrid1_UpdateCommand(object sender, GridCommandEventArgs e)
    {
        // Get reference to the old filePath
        string oldFilePath = Server.MapPath((string)(e.Item as GridEditableItem).GetDataKeyValue("FilePath"));
     
        if (!string.IsNullOrEmpty(newFileName))
        {
            string updateQuery = "UPDATE PickupFiles SET FilePath=@FilePath, FileName=@FileName WHERE FileID=@FileID";
     
            using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
            {
                using (SqlCommand comm = new SqlCommand(updateQuery, conn))
                {
                    string FullPathToApplication = Request.PhysicalApplicationPath;
                    string FullPathToFiles = "~/" + Server.MapPath("Files/" + newFileName).Replace(FullPathToApplication, string.Empty).Replace("\\", "/");
     
                    comm.Parameters.Add(new SqlParameter("FileID", (e.Item as GridEditableItem).GetDataKeyValue("FileID")));
                    comm.Parameters.Add(new SqlParameter("FilePath", FullPathToFiles));
                    comm.Parameters.Add(new SqlParameter("FileName", newFileName));
     
                    conn.Open();
                    comm.ExecuteNonQuery();
                }
            }
     
            // If update was successfull, delete the old file
            if (File.Exists(oldFilePath))
                File.Delete(oldFilePath);
        }
    }

    DeleteCommand event handler
    protected void RadGrid1_DeleteCommand(object sender, GridCommandEventArgs e)
    {
        string filePath = Server.MapPath((string)(e.Item as GridDataItem).GetDataKeyValue("FilePath"));
     
        if (File.Exists(filePath))
            File.Delete(filePath);
     
        string updateQuery = "DELETE FROM PickupFiles WHERE FileID = @FileID";
     
        using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
        {
            using (SqlCommand comm = new SqlCommand(updateQuery, conn))
            {
                comm.Parameters.Add(new SqlParameter("FileID", (e.Item as GridDataItem).GetDataKeyValue("FileID")));
     
                conn.Open();
                comm.ExecuteNonQuery();
            }
        }
    }

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