SharePoint 更新word 等文档的内容，包括替换哦。功能强大

   public void UpdateDocument()
        {
            System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
            SPSecurity.RunWithElevatedPrivileges(delegate()
            {
                using (SPSite siteColl = new SPSite("http://localhost:8080/"))
                {
                    using (SPWeb web = siteColl.OpenWeb())
                    {
                        try
                        {
                            SPFile spfile = web.GetFile("http://localhost:8080/Lists/DemoLib/abc.txt");
                            if (spfile.Exists)
                            {
                                byte[] byteArrayFileContentsBefore = spfile.OpenBinary();
                                if (byteArrayFileContentsBefore.Length > 0)
                                {
                                    string strFileContentsBefore = enc.GetString(byteArrayFileContentsBefore); //convert byte array to string. 
                                    string newStr = strFileContentsBefore.Replace("http://dev:999","http://google.com");
                                    byte[] byteArrayFileContentsAfter = null;
                                    if (!newStr.Equals(""))
                                    {
                                        byteArrayFileContentsAfter = enc.GetBytes(newStr);
                                        spfile.SaveBinary(byteArrayFileContentsAfter); //save to the file.  
                                    }
                                }
                            }
                        }
                        catch (Exception e) { }
                    }
                }
            });
        }

SPFile has a CopyFile method which can copy the file to a new location. But if there was an existing file on the new location, you can set the overwrite parameter to true to overwrite it. Here is a problem, supposingly there was a workflow already on the file in the new location... when you use CopyFile.. the workflow is lost.. basically it is not an update of the file.. it is infact a delete and re-adding of the file. The following code will overcome this problem

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private void UpdateDocumentForERB_ExecuteCode(SPWeb web, string originalFileUrl, string targetFileUrl) {  SPSecurity.RunWithElevatedPrivileges(delegate()  {   SPFile OriFile = web.GetFile(originalFileUrl);   SPFile TarFile = web.GetFile(targetFileUrl);      byte[] byteArrayOriFile = OriFile.OpenBinary();      TarFile.SaveBinary(byteArrayOriFile);     });    }

 

 

public void UpdateDocument()

{

 System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();

  

 SPSecurity.RunWithElevatedPrivileges(delegate()

 {

  using (SPSite siteColl = new SPSite("http://localhost:8080/"))

  {

   using (SPWeb web = siteColl.OpenWeb())

   {

    try

    {   

     SPFile spfile = web.GetFile("http://localhost:8080/Lists/DemoLib/abc.txt");

     if (spfile.Exists)

     {

      byte[] byteArrayFileContentsBefore = spfile.OpenBinary();

  

      if (byteArrayFileContentsBefore.Length > 0)

      {

       string strFileContentsBefore = enc.GetString(byteArrayFileContentsBefore); //convert byte array to string.

       string newStr = strFileContentsBefore + "This is the new text added";

       byte[] byteArrayFileContentsAfter = null;

       if (!newStr.Equals(""))

       {

        byteArrayFileContentsAfter = enc.GetBytes(newStr);

        spfile.SaveBinary(byteArrayFileContentsAfter); //save to the file.

       }

      }

     }

    }

    catch (Exception e){}

   } 

  }

 });

}