如何使用 CSOM 将（多个）文件上传到 SharePoint Online？

Question

我有一个 Web 表单，可以将一些输入的数据作为新列表项上传到 SharePoint 列表，效果很好。我尝试添加一个新代码以通过两个单独的 <asp:FileUpload> 控件上传两个文件。 protected void sendToSharePoint() {} 中的以下代码无法将任何一个文件上传到指定的 SharePoint 文档库，更不用说两者了：

Default.aspx:

//Existing code

<asp:FileUpload ID="upldGradeReport" runat="server" />
<asp:FileUpload ID="upldExpenseReceipt" runat="server" />

<asp:Button ID="btnSubmitForm" OnClick="SubmitButton_Click" runat="server" Text="Submit" />

Default.aspx.cs:

using System;
using System.DirectoryServices;
using System.IO;
using System.Security;
using System.Web.UI;
using Microsoft.SharePoint.Client;
using ClientOM = Microsoft.SharePoint.Client;

//I left out the NameSpace and default public partial class wrapper, but they're here.

public ClientContext SPClientContext { get; set; }
public string SPErrorMsg { get; set; }

protected void SubmitButton_Click(object sender, EventArgs e) {
    sendToSharePoint();
    Response.BufferOutput = true;
    Response.Redirect("Submission.aspx");
}

protected void sendToSharePoint() {

    try {
        string siteUrl = "<sharepoint site url>";

        ClientContext clientContext = new ClientContext(siteUrl);
        clientContext.Credentials = new SharePointOnlineCredentials("<my username>", "<my password>");

        string sDocName = string.Empty;
        string sDocName1 = string.Empty;
        Uri uri = new Uri(siteUrl);
        string sSPSiteRelativeURL = uri.AbsolutePath;
        sDocName = UploadFile(upldGradeReport.FileContent, upldGradeReport.FileName, sSPSiteRelativeURL, "<sharepoint document library>");
        sDocName1 = UploadFile(upldExpenseReceipt.FileContent, upldExpenseReceipt.FileName, sSPSiteRelativeURL, "<sharepoint document library>");

        //prior CSOM code to insert values into a new List Item exists here

        clientContext.ExecuteQuery();
    } catch (Exception ex) {
        String ThisError = ex.Message;
    }
}

public String UploadFile(Stream fs, string sFileName, string sSPSiteRelativeURL, string sLibraryName) {
    string sDocName = string.Empty;
    try {
        var sFileURL = String.Format("{0}/{1}/{2}", sSPSiteRelativeURL, sLibraryName, sFileName);
        ClientOM.File.SaveBinaryDirect(SPClientContext, sFileURL, fs, true);
        sDocName = sFileName;
    } catch (Exception ex) {
        sDocName = string.Empty;
        SPErrorMsg = ex.Message;
    }
    return sDocName;
}

创建新 ListItem 并将表单的其余输入数据上传到单独的 SharePoint 列表的代码在提交后仍然有效，我已确认凭据正确并且正在使用的帐户有权将文件上传到文档库。

我做错了什么？

Answer 1

我在本地环境中测试了以下代码；它工作正常。

<div>
    <asp:FileUpload ID="upldGradeReport" runat="server" />
    <asp:FileUpload ID="upldExpenseReceipt" runat="server" />

    <asp:Button ID="btnSubmitForm" OnClick="SubmitButton_Click" runat="server" Text="Submit" />
</div>


protected void SubmitButton_Click(object sender, EventArgs e)
{
    sendToSharePoint();
    Response.BufferOutput = true;
    Response.Redirect("Submission.aspx");
}

protected void sendToSharePoint()
{

    try
    {
        string siteUrl = "https://tenant.sharepoint.com/sites/lee";

        ClientContext clientContext = new ClientContext(siteUrl);
        SecureString securePassword = new SecureString();
        foreach (char c in "password".ToCharArray()) securePassword.AppendChar(c);
        clientContext.Credentials = new SharePointOnlineCredentials("lee@tenant.onmicrosoft.com", securePassword);                
        string sDocName = string.Empty;
        string sDocName1 = string.Empty;
        Uri uri = new Uri(siteUrl);
        string sSPSiteRelativeURL = uri.AbsolutePath;
        sDocName = UploadFile(clientContext,upldGradeReport.FileContent, upldGradeReport.FileName, sSPSiteRelativeURL, "MyDoc");
        sDocName1 = UploadFile(clientContext,upldExpenseReceipt.FileContent, upldExpenseReceipt.FileName, sSPSiteRelativeURL, "MyDoc");

        //prior CSOM code to insert values into a new List Item exists here

        //clientContext.ExecuteQuery();
    }
    catch (Exception ex)
    {
        String ThisError = ex.Message;
    }
}

public String UploadFile(ClientContext clientContext,Stream fs, string sFileName, string sSPSiteRelativeURL, string sLibraryName)
{
    string sDocName = string.Empty;
    try
    {
        var sFileURL = String.Format("{0}/{1}/{2}", sSPSiteRelativeURL, sLibraryName, sFileName);

        Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, sFileURL, fs, true);
        sDocName = sFileName;
    }
    catch (Exception ex)
    {
        sDocName = string.Empty;
        //SPErrorMsg = ex.Message;
    }
    return sDocName;
}

如何使用 CSOM 将（多个）文件上传到 SharePoint Online？

How to upload (multiple) files to SharePoint Online using CSOM?

c#

asp.net

sharepoint

csom

sharepoint-online