Upload files to Share point from ASP.NET

We will see some of the code samples to upload files to a SharePoint or a mapped drive using HTTP PUT methods.

ASP.NET UI code is going to look something like

UI code

<form id="form1" runat="server">

<div>

<asp:FileUpload ID="FileUpload1" runat="server" Width = "500px" />

<br />

<br />

<asp:Button ID="UploadButton" runat="server" OnClick="Button1_Click"

Text="Upload File" />

<br />

<br />

<asp:Label ID="Label1" runat="server">asp:Label>

div>

form>

Upload Code

protected void UploadFileToSharePoint(string UploadedFilePath,

    string SharePointPath)

{

    WebResponse response = null;

    lnkUpload.Disabled = false;

    try

    {

        // Create a PUT Web request to upload the file.

        WebRequest request = WebRequest.Create(SharePointPath);

        request.Credentials = CredentialCache.DefaultCredentials;

        request.Method = "PUT";

        byte[] buffer = new byte[1024];

        using (Stream stream = request.GetRequestStream())

        using (FileStream fsWorkbook = File.Open(UploadedFilePath,

            FileMode.Open, FileAccess.Read))

        {

            int i = fsWorkbook.Read(buffer, 0, buffer.Length);

            while (i > 0)

            {

                stream.Write(buffer, 0, i);

                i = fsWorkbook.Read(buffer, 0, buffer.Length);

            }

        }

        response = request.GetResponse();

    }

    catch (Exception ex)

    {

        throw ex;

    }

    finally

    {

        response.Close();

    }

}

private void UploadFile()

{

    try

    {

        if (FileUpload1.HasFile)

            try

            {

                string uploadedFilePath = FileUpload1.PostedFile.FileName;

                Label1.Text = "File name: " +

                     FileUpload1.PostedFile.FileName + "
" +

                     FileUpload1.PostedFile.ContentLength + " bytes
" +

                     "Content type: " +

                     FileUpload1.PostedFile.ContentType;

                UploadFileToSharePoint(

                    uploadedFilePath ,

                    sharePointListPath + FileUpload1.FileName);

            }

            catch (Exception ex)

            {

                Label1.Text = "ERROR: " + ex.Message.ToString();

            }

        else

        {

            Label1.Text = "You have not specified a file.";

        }

    }

    catch (Exception)

    {

        throw;

    }

}

Delete file

    private void DeleteFile()

    {

    //bool isExists = false;

    System.IO.StreamReader reader = null;

    Stream dataStream = null;

    HttpWebResponse response = null;

    try

    {

        WebRequest request = WebRequest.Create(deleteFile);

        request.Credentials = new System.Net.NetworkCredential(USERNAME , PWD, DOMAIN);

        request.Method = "DELETE";

        response = (HttpWebResponse)request.GetResponse();

        dataStream = response.GetResponseStream();

        reader = new StreamReader(dataStream);

        string responseFromServer = reader.ReadToEnd();

        // isExists = true;

    }

    catch (WebException)

    {

        throw;

    }

View Code 

private void OpenDoc()

{

    string loginUri = FILENAME   ;

    WebClient Client = new WebClient();

    Client.Credentials = new NetworkCredential(USERNAME , PWD, DOMAIN );

    byte[] b = Client.DownloadData(loginUri);

    HttpContext.Current.Response.AddHeader("content-disposition", "Attachment; filename=" + "Doc1.doc");

    HttpContext.Current.Response.BinaryWrite(b);

}

Check for File Exists

private bool CheckIfFileExists()

{

    bool isExists =false;

    System.IO.StreamReader  reader = null;

    Stream dataStream = null;

    HttpWebResponse response = null ;

    try

    {

        WebRequest request = WebRequest.Create(FILENAME);

        request.Credentials = new System.Net.NetworkCredential(USERNAME , PWD , DOMAIN );

        request.Method = "HEAD";

        response = (HttpWebResponse)request.GetResponse();

        dataStream = response.GetResponseStream();

        reader = new StreamReader(dataStream);

        string responseFromServer = reader.ReadToEnd();

        isExists = true;

    }

    catch (WebException)

    {

        throw;

    }

    return isExists;

}