C# – Upload File To SharePoint Online(office 365) Library Invokes Error

coffice365sharepoint

How can one resolve this runtime error?

Error

Could not load file or assembly 'Microsoft.SharePoint.Library, Version = 14.0.0.0, Culture = neutral, PublicKeyToken = 71e9bce111e9429c' or one of its dependencies. The system can not find the file specified.

CODE

string destUrl = "URL";
string destFileUrl = destUrl  + "biblioteca" + "/text.txt";
using(SPWeb site = new SPSite(destUrl).OpenWeb())
{
    site.AllowUnsafeUpdates = true;

    FileStream fileStream = File.Open("FILE" , FileMode.Open);

    site.Files.Add(destFileUrl, fileStream, true/*overwrite*/);

    fileStream.Close();
}

Best Answer

This works for me.

using (ClientContext clientContext = new ClientContext("SHAREPOINT URL")) {
    SecureString passWord = new SecureString();
    foreach (char c in "PASSWORD".ToCharArray()) passWord.AppendChar(c);
    clientContext.Credentials = new SharePointOnlineCredentials("ACOUNT.onmicrosoft.com", passWord);
    Web web = clientContext.Web; 
    FileCreationInformation newFile = new FileCreationInformation();
    newFile.Content = System.IO.File.ReadAllBytes(FILE);
    newFile.Url = NAMEFORTHEFILE;
    
    List docs = web.Lists.GetByTitle("LIBRARY NAME");
    Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(newFile);

    clientContext.ExecuteQuery();
}

Related Solutions

C# – I get a “An attempt was made to load a program with an incorrect format” error on a SQL Server replication project

The answer by baldy below is correct, but you may also need to enable 32-bit applications in your AppPool.

Source: http://www.alexjamesbrown.com/uncategorized/could-not-load-file-or-assembly-chilkatdotnet2-or-one-of-its-dependencies-an-attempt-was-made-to-load-a-program-with-an-incorrect-format/

Whilst setting up an application to run on my local machine (running Vista 64bit) I encountered this error:

Could not load file or assembly ChilkatDotNet2 or one of its dependencies. An attempt was made to load a program with an incorrect format.

Obviously, the application uses ChilKat components, but it would seem that the version we are using, is only the 32bit version.

To resolve this error, I set my app pool in IIS to allow 32bit applications. Open up IIS Manager, right click on the app pool, and select Advanced Settings (See below)

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Then set "Enable 32-bit Applications" to True.

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All done!

C# – How to create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office

You can use a library called ExcelLibrary. It's a free, open source library posted on Google Code:

ExcelLibrary

This looks to be a port of the PHP ExcelWriter that you mentioned above. It will not write to the new .xlsx format yet, but they are working on adding that functionality in.

It's very simple, small and easy to use. Plus it has a DataSetHelper that lets you use DataSets and DataTables to easily work with Excel data.

ExcelLibrary seems to still only work for the older Excel format (.xls files), but may be adding support in the future for newer 2007/2010 formats.

You can also use EPPlus, which works only for Excel 2007/2010 format files (.xlsx files). There's also NPOI which works with both.

There are a few known bugs with each library as noted in the comments. In all, EPPlus seems to be the best choice as time goes on. It seems to be more actively updated and documented as well.

Also, as noted by @АртёмЦарионов below, EPPlus has support for Pivot Tables and ExcelLibrary may have some support (Pivot table issue in ExcelLibrary)

Here are a couple links for quick reference:
ExcelLibrary - GNU Lesser GPL
EPPlus - GNU (LGPL) - No longer maintained
EPPlus 5 - Polyform Noncommercial - Starting May 2020
NPOI - Apache License

Here some example code for ExcelLibrary:

Here is an example taking data from a database and creating a workbook from it. Note that the ExcelLibrary code is the single line at the bottom:

//Create the data set and table
DataSet ds = new DataSet("New_DataSet");
DataTable dt = new DataTable("New_DataTable");

//Set the locale for each
ds.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;
dt.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;

//Open a DB connection (in this example with OleDB)
OleDbConnection con = new OleDbConnection(dbConnectionString);
con.Open();

//Create a query and fill the data table with the data from the DB
string sql = "SELECT Whatever FROM MyDBTable;";
OleDbCommand cmd = new OleDbCommand(sql, con);
OleDbDataAdapter adptr = new OleDbDataAdapter();

adptr.SelectCommand = cmd;
adptr.Fill(dt);
con.Close();

//Add the table to the data set
ds.Tables.Add(dt);

//Here's the easy part. Create the Excel worksheet from the data set
ExcelLibrary.DataSetHelper.CreateWorkbook("MyExcelFile.xls", ds);

Creating the Excel file is as easy as that. You can also manually create Excel files, but the above functionality is what really impressed me.

Best Answer

Related Solutions

C# – I get a “An attempt was made to load a program with an incorrect format” error on a SQL Server replication project

C# – How to create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office

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