Fileupload is always null

Question

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i am trying to upload the file in sql server but it always shows fileupload is null
kindly help..

ASPX

<%@ Page Language="C#" MasterPageFile="~/Header/DMSMain.Master" AutoEventWireup="true" CodeBehind="Budgetlistdetails.aspx.cs" Inherits="DMS.Masters.Budgetlistdetails" %>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
...
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:Label ID="lblselfile" runat="server" CssClass="label_text">Select File</asp:Label>
        <asp:FileUpload ID="FileUpload1"  runat="server" Height="19px" Width="132px"  />
        <asp:Button ID="btnupload" runat="server" Text="Upload" OnClick="btnupload_Click"  />

        <Triggers>
            <asp:PostBackTrigger ControlID="btnupload" />
            <asp:AsyncPostBackTrigger ControlID="btnupload"/>
        </Triggers>
        
        <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="Please select a file" ValidationGroup="a" ControlToValidate="FileUpload1"></asp:RequiredFieldValidator>
    </ContentTemplate>
    </asp:UpdatePanel>
</asp:Content>

C#

protected void btnupload_Click(object sender, EventArgs e)
{
    HttpPostedFile postedFile = FileUpload1.PostedFile;
    string filename = Path.GetFileName(postedFile.FileName);
    int filesize = postedFile.ContentLength;
    
    Stream stream = postedFile.InputStream;
    BinaryReader br = new BinaryReader(stream);
    byte[] bytes = br.ReadBytes((int)stream.Length);
    using (MasterManagement mMgmt = new MasterManagement(General.ConnString()))
    {
        mMgmt.budgetupload(txtbudid.Text.Trim(), bytes, filename, filesize, Session["UId"].ToString());
        LblError.Visible = true;
        LblError.Text = "Budget details added successfuly and send for authorization";
    }
    HyperLink1.NavigateUrl = "~/Imageviewer.aspx?ID=" + txtbudid.ToString();
}

What I have tried:

i tried adding the trigger but still same issue

Posted 7-Jul-20 9:26am

Member 13998042

Updated 8-Jul-20 0:08am

Richard Deeming

v2

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Comments

ZurdoDev 7-Jul-20 15:28pm

Only post relevant code. Please cleanup the code you have posted to just relevant code and also post the C# code you have.

Member 13998042 7-Jul-20 15:31pm

protected void btnupload_Click(object sender, EventArgs e)
{
HttpPostedFile postedFile = FileUpload1.PostedFile;
string filename = Path.GetFileName(postedFile.FileName);
int filesize = postedFile.ContentLength;

Stream stream = postedFile.InputStream;
BinaryReader br = new BinaryReader(stream);
byte[] bytes = br.ReadBytes((int)stream.Length);
using (MasterManagement mMgmt = new MasterManagement(General.ConnString()))
{
mMgmt.budgetupload(txtbudid.Text.Trim(), bytes, filename, filesize, Session["UId"].ToString());
LblError.Visible = true;
LblError.Text = "Budget details added successfuly and send for authorization";
}
HyperLink1.NavigateUrl = "~/Imageviewer.aspx?ID=" + txtbudid.ToString();
}
this is the c# code

DerekT-P 8-Jul-20 6:00am

So what, exactly, is "always null"? FileUpload1? "bytes"? Your original question says "upload the file in sql server but it always shows fileupload is null" but you've still shown us no reference to Sql Server, or how you're expecting the file contents to get there. In your question, what do you mean by "it"? The column in a d/b table somewhere??

Member 13998042 12-Jul-20 11:21am

The file upload was null(fileupload.hasfile) function , but now its been resolved thanks for the help

1 solution

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Richard Deeming · Accepted Answer · 2020-07-08T00:08:00

Solution 1

You've set btnUpload to be both a PostBackTrigger and an AsyncPostBackTrigger. It should only be a PostBackTrigger, since file uploads don't work via AJAX in an UpdatePanel.

You also need to make sure you have the correct enctype set on your <asp:form>:

C#

public void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        Page.Form.Enctype = "multipart/form-data";
    }
}

Posted 8-Jul-20 0:08am

Richard Deeming

Comments

Parthasarathy Mandayam 17-Jul-23 3:35am

why should it be !Page.IsPostBack?
Also I have the fileupload working fine in another sample program without this enctype stuff