Get FileUpload control value

[renatois]

Get FileUpload control value

Hi guys, I have an aspx webpage with 9 fileupload controls called (fupBlogImg1,fupBlogImg2,.........fupBlogImg9 ). I want to get their values with a for at the code after the button (cmdAlbumCreate) is clicked.

Here is the code but fupBlogImg is null (I dont know why)
for (int n = 1; n < 10; n++)
{
string StrBlogImg = "fupBlogImg" + n;
FileUpload fupBlogImg = (FileUpload)FindControl(StrBlogImg);

Thank you all

[Frinavale]

Get FileUpload control value

Hi guys, I have an aspx webpage with 9 fileupload controls called (fupBlogImg1,fupBlogImg2,.........fupBlogImg9 ). I want to get their values with a for at the code after the button (cmdAlbumCreate) is clicked.

Here is the code but fupBlogImg is null (I dont know why)
for (int n = 1; n < 10; n++)
{
string StrBlogImg = "fupBlogImg" + n;
FileUpload fupBlogImg = (FileUpload)FindControl(StrBlogImg);

Thank you all

Instead of declaring 9 individual file upload controls, consider using an array of 9 file upload controls. Then you will be able to loop through the array as you desire.

-Frinny

[renatois]

Instead of declaring 9 individual file upload controls, consider using an array of 9 file upload controls. Then you will be able to loop through the array as you desire.

-Frinny

Thanks Frinny but how would I do that? please

[renatois]

protected void cmdAlbumCreate_Click(object sender, EventArgs e)
{
FileUpload fupBlogImg1 = (FileUpload)FindControl("fupBlogImg1");........

The code above says fupBlogImg1 is null but I have that control created on the page?? any idea?

Ty all

[Frinavale]

protected void cmdAlbumCreate_Click(object sender, EventArgs e)
{
FileUpload fupBlogImg1 = (FileUpload)FindControl("fupBlogImg1");........

The code above says fupBlogImg1 is null but I have that control created on the page?? any idea?

Ty all

Could you please post more of your code so that I can get a better idea of what you mean when you say you've create the control on the page.

In the mean time check out this article (it's still in a rough draft and the example's in vb. But you should be able to get the idea of how to dynamically create controls through it)

-Frinny

[renatois]

HERE IS THE CODE:

PAGE.ASPX

<asp:FileUpload ID="fupBlogImg1" runat="server" Width="298px" />
<asp:FileUpload ID="fupBlogImg2" runat="server" Width="298px" />
............
<asp:FileUpload ID="fupBlogImg9" runat="server" Width="298px" />
<asp:Button ID="cmdAlbumCreate" runat="server" Text="Inserir imagens no álbum" OnClick="cmdAlbumCreate_Click" /> 
 

PAGE.ASPX.CS

protected void cmdAlbumCreate_Click(object sender, EventArgs e)
{
FileUpload fupBlogImg1 = (FileUpload)FindControl("fupBlogImg1");
FileUpload fupBlogImg2 = (FileUpload)FindControl("fupBlogImg2");
.............
FileUpload fupBlogImg9 = (FileUpload)FindControl("fupBlogImg9");
 

but fupBlogImg1,2...9 is returning null. I have tryied Page.FindControl but didnt work

If you need anything else to get a better understanding pls let me know.

TY

[Frinavale]

HERE IS THE CODE:

PAGE.ASPX
<asp:FileUpload ID="fupBlogImg1" runat="server" Width="298px" />
<asp:FileUpload ID="fupBlogImg2" runat="server" Width="298px" />
............
<asp:FileUpload ID="fupBlogImg9" runat="server" Width="298px" />
<asp:Button ID="cmdAlbumCreate" runat="server" Text="Inserir imagens no álbum" OnClick="cmdAlbumCreate_Click" />
PAGE.ASPX.CS
protected void cmdAlbumCreate_Click(object sender, EventArgs e)
{
FileUpload fupBlogImg1 = (FileUpload)FindControl("fupBlogImg1");
FileUpload fupBlogImg2 = (FileUpload)FindControl("fupBlogImg2");
.............
FileUpload fupBlogImg9 = (FileUpload)FindControl("fupBlogImg9");

but fupBlogImg1,2...9 is returning null. I have tryied Page.FindControl but didnt work

If you need anything else to get a better understanding pls let me know.

TY

You don't need to Redeclare the FileUplaod controls.
You have declared them in your aspx code and these variables can be accessed in your C# code.

For instance if you want to retrieve the file name of the file being uploaded in the fupBlogImg9 you would do something like:

String fileName = fupBlogImg9.FileName;

You don't need to do this:
FileUpload fupBlogImg9 = (FileUpload)FindControl("fupBlogImg9");
You already have a fupBlogImg9 FileUpload control to use.

I think you're losing the object state for your FileUpload control when you are redeclaring it.

[Plater]

I rather think that doing this:

FileUpload fupBlogImg9 = (FileUpload)FindControl("fupBlogImg9");
 

Is what is causing the problem, you're trying to both reference and re-declare a variable with the same name from two different scopes.

If you did not want an array, you could do something like this:

FileUpload tempfup =null;
for(int i=0;i<10;i++)
{
   Control c = FindControl("fupBlogImg"+i.ToString());
   if(c!=null)
   {//a control was found
      if(c.GetType()==typeof(FileUpload))
      {//there are better ways, but I always like to check to make sure
         tempfup = (FileUpload)c;
         //now do something with the values of the tempfup object
      }
   }
}