以编程方式修改 Sharepoint Online Excel 文件

Question

我们需要创建一个 c# 应用程序来修改我们的一个 Sharepoint 在线站点中的 Excel 文件。

对于本地文件，我是这样的：

Excel.Application excel_app = new Excel.Application();
excel_app.Visible = true;
Excel.Workbook workbook = excel_app.Workbooks.Open(
        <path to excel file>,
        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
        Type.Missing, Type.Missing);

但是，如果我将 Sharepoint Excel 文件的 url 放入其中，它就不起作用了。这是否可行，如何实现？

Answer 1

您可以下载文件，修改，上传文件，替换

这是连接到共享点网站并上传文件的方法

使用 Microsoft.SharePoint.Client 命名空间

using SP = Microsoft.SharePoint.Client;
...
using (var context = new SP.ClientContext(new Uri(<YOURSITEURL>))) {
    var web = context.Web;
    context.Credentials = new NetworkCredential(<NETWORK_USERNAME>, <NETWORK_PASS>, <DOMAIN_NAME>);
    context.Load(web);
    try
    {
        context.ExecuteQuery();
    } catch (Exception ex) {
    }
    var file = web.GetFileByServerRelativeUrl(new Uri(<FILE_URL>).AbsolutePath);
    context.Load(file);
    try
    {
        context.ExecuteQuery();
        file.SaveBinary(new SP.FileSaveBinaryInformation() { Content = Encoding.UTF8.GetBytes(<NEW_FILE>) });
        try
        {
            context.ExecuteQuery();
        }
        catch (Exception ex)
        {
        }
    }
}

Answer 2

上传一个文件（excel，word等）到Sharepoint online下面是代码：注意：在 .net FRAMEWORK 中创建项目（不要在 .net core 中这样做）并安装 Microsoft.SharePointOnline.CSOM

的 nuget 包

    ClientContext ccontext = new ClientContext("<URL>/sites/<foldername>");
    var securePassword = GetPasswordAsSecureString("<YOUR PASSWORD>"); // function is below
    ccontext.AuthenticationMode = ClientAuthenticationMode.Default;
    var onlineCredentials = new SharePointOnlineCredentials("<YOU-EMAIL-ID>", securePassword);
    ccontext.Credentials = onlineCredentials;
    List lst = ccontext.Web.Lists.GetByTitle("Documents");

 var DestSubFolder = "General/Data";
            Folder fileFolder = lst.RootFolder;
            if (DestSubFolder.Length > 0)
                fileFolder = CreateFolderInternal(ccontext.Web, lst.RootFolder, DestSubFolder);

    // upload File.
    FileCreationInformation newFile = new FileCreationInformation();
    byte[] FileContent = System.IO.File.ReadAllBytes("c://Temp/test.txt");
    newFile.ContentStream = new MemoryStream(FileContent);
    newFile.Url = Path.GetFileName("c://Temp/test.txt");
    newFile.Overwrite = true;

    fileFolder.Files.Add(newFile);
    fileFolder.Update();
    ccontext.ExecuteQuery();

    private static SecureString GetPasswordAsSecureString(string password)
    {
        SecureString securePassword = new SecureString();
        foreach (char c in password)
        {
            securePassword.AppendChar(c);
        }
        return securePassword;
    }

以编程方式修改 Sharepoint Online Excel 文件

Programmatically modifying a Sharepoint Online Excel file

c#

visual-studio

sharepoint-online