Custom Webpart to Upload File in SharePoint Document Library

This article explains how to upload a file in a Document Library.

In SharePoint, library files are uploaded using the Add method on the Files property of a SPWeb like this:

SPContext.Current.Web.Files.Add(docLibrary.RootFolder.Url + "/" + fileUpload.FileName, contents);

I have created a webpart that uploads a file provided by the user to a SharePoint library.

Use the following procedure to create a sample of doing it.

1. Create an empty SharePoint project and add a webpart.



2. Modify the code as below:

using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using System.IO;

namespace UploadFile.UploadFileWebPart
{
    [ToolboxItemAttribute(false)]
    public class UploadFileWebPart : WebPart
    {
        private FileUpload fileUpload = new FileUpload();
        private Button btnUpload = new Button();

        private string docLibrary;

        [WebBrowsable, Personalizable]
        public string DocumentLibrary
        {
            Get
            {
                return docLibrary;
            }
            Set
            {
                docLibrary = value;
            }
        }
        protected override void CreateChildControls()
        {
            Controls.Add(fileUpload);
            Controls.Add(btnUpload);

            btnUpload.Text = "Upload";
            btnUpload.Click += new EventHandler(OnUploadClick);
        }
        void OnUploadClick(object sender, EventArgs e)
        {
            SPList docLibrary;
            Try
            {
                docLibrary = ValidateList();
            }
            catch (Exception ex)
            {
                Controls.Add(new LiteralControl(ex.Message));
                return;
            }
            Stream fStream = fileUpload.PostedFile.InputStream;
            byte[] contents = new byte[fStream.Length];
            fStream.Read(contents, 0, (int)fStream.Length);
            fStream.Close();

            SPSecurity.CatchAccessDeniedException = false;
            Try
            {
                SPContext.Current.Web.Files.Add(docLibrary.RootFolder.Url + "/" + fileUpload.FileName, contents);
            }
            catch (UnauthorizedAccessException)
            {
                Controls.Add(new LiteralControl("You are not authorized to upload files to the document library"));
            }
        }
        private SPList ValidateList()
        {
            if (string.IsNullOrEmpty(DocumentLibrary))
            {
                throw new Exception("Please edit the webpart and fill the Document Library property!");
            }

            if (!fileUpload.HasFile)
            {
                throw new Exception("Please select a file to upload.");
            }
            Try
            {
                return SPContext.Current.Web.Lists[DocumentLibrary];
            }
            catch (ArgumentException)
            {
                throw new Exception("Library not found!");
            }
        }

    }
}

3. Build the solution and deploy.

4. Go to the Site Page library and create a page as in the following:



5. Add the Webpart.



6. Try to upload a document in the library. You will get the error as below:



7. Edit the webpart and fill in the name of the Document Library where you want to add the document through this page's webpart.



8. Now upload a file.



9. Navigate to the Document Library. You will find your uploaded document in the library.



Conclusion

This article explained how to upload a document in a Document Library using a custom webpart property.