Trying to use File Upload in Listview? Update not working

Question

Here is my ListView. I'm using the OnItemCommand to reference the code in code-behind. Here I'm trying to Update the database with the new FileUpload control.

 <%--Listview--%>
<asp:ListView runat="server" ID="livLocation" class="container"
    DataKeyNames="LocationID"
    DataSourceID="sdsListViewLocation"
    EmptyDataText="No data to display"
    InsertItemPosition="FirstItem"
    OnItemInserted="livLocation_ItemInserted"
    OnItemUpdated="livLocation_ItemUpdated"
    OnItemDeleted="livLocation_ItemDeleted"
    OnItemCanceling="livLocation_ItemCanceling"
    OnItemCommand="livLocation_ItemCommand">
</asp:ListView>

The Insert works perfectly fine. When an Update is executed a Null error is thrown for all FindControls. I believe for some reason the FindControls are not working for the Update. I have tried giving each control their own id's but that still didn't fix the problem. I have been referencing this post but nothing has helped so far: Upload images with fileupload within a Listview asp.net

 protected void livLocation_ItemCommand(object sender, ListViewCommandEventArgs e)
    {
        //
        if (e.CommandName == "Insert")
        {
            // Find controls on insert.
            TextBox txtLocation = (TextBox)livLocation.InsertItem.FindControl("txtLocation");
            TextBox txtImage = (TextBox)livLocation.InsertItem.FindControl("txtImage");
            FileUpload fuiImage = (FileUpload)livLocation.InsertItem.FindControl("fuiImage");

            // Get today's date
            String strDate = DateTime.Now.ToString("MM-dd-yyyy-h-m-stt");

            // If file is there to upload.
            if (fuiImage.HasFile)
            {
                // Set path.
                String strFileName = txtLocation.Text + "-" + strDate + ".jpg";
                String strPath = Request.PhysicalApplicationPath + "Image\\Location\\" + strFileName;

                // Save file.
                fuiImage.SaveAs(strPath);

                // Fill Image textbox
                txtImage.Text = strFileName;
            }
            else
            {
                // Do nothing
            }
        }
        else if (e.CommandName == "Update")
        {
            // Find controls on insert.
            TextBox txtLocation = (TextBox)livLocation.InsertItem.FindControl("txtLocation");
            TextBox txtImage = (TextBox)livLocation.InsertItem.FindControl("txtImage");
            FileUpload fuiImage = (FileUpload)livLocation.InsertItem.FindControl("fuiImage");

            // Get today's date
            String strDate = DateTime.Now.ToString("MM-dd-yyyy-h-m-stt");

            // If file is there to upload.
            if (fuiImage.HasFile)
            {
                // Set path.
                String strFileName = txtLocation.Text + "-" + strDate + ".jpg";
                String strPath = Request.PhysicalApplicationPath + "Image\\Location\\" + strFileName;

                // Save file.
                fuiImage.SaveAs(strPath);

                // Fill Image textbox
                txtImage.Text = strFileName;
            }
            else
            {
                // Do nothing
            }
        }
        else if (e.CommandName == "Delete")
        {
            // Delete file.
            FileUpload fuiImage = (FileUpload)livLocation.InsertItem.FindControl("fuiImage");
            String strPath = Request.PhysicalApplicationPath + "Image\\Location\\" + fuiImage.FileName;

            System.IO.File.Delete("strPath");

        }
        else
        {
            // Do nothing
        }
    }
}

can you include the sytnax for the ListView of the aspx file.. — Hany Habib, Mar 28 '20 at 21:09
first you should use the sender object its easier for maintainability later.. second the edit index and edit item what are their values? — Hany Habib, Mar 28 '20 at 21:39
@Hany Habib OK I will do that. I'm not sure what you mean by those values? — Isiah Jones, Mar 28 '20 at 21:47
the value for edittem property : https://learn.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.listview.edititem?view=netframework-4.8 — Hany Habib, Mar 28 '20 at 21:50
@HanyHabib I did use or set any values for the EditItem Property. — Isiah Jones, Mar 28 '20 at 21:53
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/210502/discussion-between-isiah-jones-and-hany-habib). — Isiah Jones, Mar 28 '20 at 21:57

Hany Habib · Accepted Answer · 2020-03-28T22:07:45.983

1

As discussed its always nice to use the sender object for better maintainability later. for your issue kindly visit the following link to get the edited item as your syntax is not correct: https://learn.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.listview.itemediting?view=netframework-4.8

it shows more details about item editing and how to fetch the edited item with the new edit index.

the
(TextBox)livLocation.InsertItem is incorrect it must be EditItem so it will be (FileUpload)(sender as ListView).EditItem.FindControl.....

edited Mar 28 '20 at 22:07

answered Mar 28 '20 at 22:01

Hany Habib

1,377
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You have to use (FileUpload)livLocation.EditItem.FindControl – Isiah Jones Mar 28 '20 at 22:04
will include it :) – Hany Habib Mar 28 '20 at 22:05
Any suggestion when using Delete? – Isiah Jones Apr 13 '20 at 16:22

Trying to use File Upload in Listview? Update not working

1 Answers1