SharePoint 2010 列表项代码绑定附件心得 （FileUpload上传附件）

最近项目中用到在插入Item时绑定附件，可以上传多个附件，很快就写出来了，可是测试一侧老是有问题，经过多番折腾，终于算通过测试。SharePoint 2010上传附件需注意一下几点：

1. 判断文件是否为空，即文件内容什么都没有。
2. 判断文件的扩展名是否存在。
3. 判断文件名称是否包含特殊字符，参考http://support.microsoft.com/kb/894629
4. 判断文件扩展名称是否被禁用，在管理中心可设置。
5. 判断文件上传大小，SharePoint 2010  默认是50M。

Code: 

 

  1 　　　　　　if (FileUpload1.PostedFile.ContentLength ==0)
  2             {
  3 string str =@"The file name is invalid or the file is empty. A file name can not contain any of the following characters: \ / : * ? "" < > | # { } % ~ & ";
  4                 labMsg.Text = str;
  5                 labMsg.Visible =true;
  6 return;
  7             }
  8 if (FileUpload1.PostedFile !=null)
  9             {
 10 //Check upload file extension name
 11  string fileExtension = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
 12 if (fileExtension ==string.Empty || fileExtension ==null)
 13                 {
 14 string str =@"The file is not extension name.";
 15                     labMsg.Text = str;
 16                     labMsg.Visible =true;
 17 return;
 18                 }
 19 else
 20                 {
 21                     labMsg.Visible =false;
 22                 }
 23 string fileName = FileUpload1.FileName;
 24 int index = fileName.LastIndexOf(".");
 25                 fileName = fileName.Substring(0, index);
 26                 List<string> characters =new List<string>();//\ / : * ? " < > | # { } % ~ & //特殊字符不只有这些，
 27  char c ='"';
 28                 characters.Add("\\");
 29                 characters.Add("/");
 30                 characters.Add(":");
 31                 characters.Add("*");
 32                 characters.Add("?");
 33                 characters.Add(c.ToString());
 34                 characters.Add("<");
 35                 characters.Add(">");
 36                 characters.Add("|");
 37                 characters.Add("#");
 38                 characters.Add("{");
 39                 characters.Add("}");
 40                 characters.Add("%");
 41                 characters.Add("~");
 42                 characters.Add("&");              
 43 foreach (string str in characters)
 44                 {
 45 if (fileName.Contains(str))
 46                     {
 47 string message =@"The file name is invalid or the file is empty. A file name can not contain any of the following characters: \ / : * ? "" < > | # { } % ~ & .";
 48                         labMsg.Text = message;
 49                         labMsg.Visible =true;
 50 return;
 51                     }
 52                 }
 53 
 54 if (CSP.Infrastructure.CSPUtility.CheckUploadFileType(fileExtension.Substring(1)))
 55                 {
 56 string message =@"The following file(s) have been blocked by the administrator: "+ FileUpload1.FileName;
 57                     labMsg.Text = message;
 58                     labMsg.Visible =true;
 59 return;
 60                 }
 61 
 62 if (FileUpload1.PostedFile.ContentLength >52100000)
 63                 {
 64                     labMsg.Text ="Can not upload file that the file size lager 50 M.";
 65                     labMsg.Visible =true;
 66 return;
 67                 }
 68 else
 69                 {
 70                     labMsg.Visible =false;
 71                 }
 72 
 73 if (ViewState["Attachment"] ==null)
 74                 {
 75                     ViewState["Attachment"] = CreateDtAttachment();
 76                 }
 77                 DataTable dt = (DataTable)ViewState["Attachment"];
 78 string name = FileUpload1.FileName.Trim();
 79                 DataRow[] rows = dt.Select("AttachmentName = '"+ name +"'");
 80 if (rows.Length >0)
 81                 {
 82 //Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "msg", "<script>alert('" + FileUpload1.FileName + " is exist !');</script>");
 83                      labMsg.Text = FileUpload1.FileName +"already exists.";
 84                     labMsg.Visible =true;
 85 return;
 86                 }
 87 else
 88                 {
 89                     labMsg.Visible =false;
 90                 }
 91                 DataRow row = dt.NewRow();
 92 if (dt.Rows.Count !=null)
 93                 {
 94                     row["AttachmentId"] = (dt.Rows.Count +1).ToString();
 95                 }
 96 else
 97                 {
 98                     row["AttachmentId"] ="0";
 99                 }
100 
101                 row["AttachmentName"] = FileUpload1.FileName;
102 
103 int len = FileUpload1.FileBytes.Length;
104 byte[] fileContent =newbyte[len];
105                 FileUpload1.FileContent.Read(fileContent, 0, len);
106 
107                 row["AttachContent"] = fileContent;
108                 dt.Rows.Add(row);
109                 ViewState["Attachment"] = dt;
110                 GvDataBind();
111             }

处理上传文件的特殊符号是比较繁琐的一件事情.SharePoint自带上传文件报错为："The file name is invalid or the file is empty. A file name can not contain any of the following characters: \ / : * ? "" < > | # { } % ~ & ";

其实还有一些其他特殊字符也会报出此错误。
 

在上传文件的时候需要取得管理中心，限制上传文件的类型，这样就可以与管理中心允许上传文件的列表保持一致，代码如下：

?

1 2 3 4 5 6 7 8 9 10 11

public static bool CheckUploadFileType(string typeName)        {            bool isExtensonFile = false;            SPSite site = SPContext.Current.Site;                       SPWebApplication webapp = site.WebApplication;            if (webapp.BlockedFileExtensions.Contains(typeName))            {                isExtensonFile = true;            }            return isExtensonFile;        }

http://www.cnblogs.com/dexter2003/archive/2010/12/05/1887806.html