无法使用VARBINARY更新资料图片 [英] unable to update profile picture using varbinary

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本文介绍了无法使用VARBINARY更新资料图片的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我试图用更新我的VARBINARY资料图片(SQL Server 2008中)。它似乎并没有更新,我把在文件上传图片。下面是我用它来更新我的个人资料图片的代码。请帮我看看上我的编码的一部分,我做了错误。
感谢。

 保护无效btnUpload_Click(对象发件人,EventArgs五)
{
字符串username =(字符串)会议[用户名];

字符串文件路径= FileUpload1.PostedFile.FileName;
字符串文件名= Path.GetFileName(文件路径);
串EXT = Path.GetExtension(文件名);

串的contentType =的String.Empty;

开关(EXT)
{
案.JPG:
的contentType =图像/ JPG
中断;
}
如果(=的contentType的String.Empty!)
{
流FS = FileUpload1.PostedFile.InputStream;

BinaryReader BR =新BinaryReader(FS);

字节[]字节= br.ReadBytes((Int32)已fs.Length);

//将文件插入数据库
串strQuery =更新LoginRegisterOthers集profilepic = @Data其中,username ='+用户名+';
的SqlCommand CMD =新的SqlCommand(strQuery);
cmd.Parameters.Add(@数据,SqlDbType.Binary).value的=字节;
InsertUpdateData(CMD);
lblMessage.ForeColor = System.Drawing.Color.Green;
lblMessage.Text =个人资料已更新。

的Response.Redirect(MemberProfile.aspx);
}
,否则如果(==的contentType的String.Empty)
{
lblMessage.Text =上传之前,请选择您的形象!
}
,否则
{
lblMessage.ForeColor = System.Drawing.Color.Red;
lblMessage.Text =文件格式无法识别。 +上传图片格式;
}
}

私人布尔InsertUpdateData(的SqlCommand CMD)
{
的SqlConnection CON =新的SqlConnection(数据源=本地主机;初始目录=项目;集成安全性=真);
cmd.CommandType = CommandType.Text;
cmd.Connection = CON;

{
con.Open();
cmd.ExecuteNonQuery();
返回真;
}
赶上(异常前)
{
的Response.Write(ex.Message);
返回FALSE;
}
终于
{
con.Close();
con.Dispose();
}
}


解决方案

尝试这样的:

  ... 

//将文件插入数据库

串strQuery =更新LoginRegisterOthers集profilepic =(SELECT BULKCOLUMN FROM OPENROWSET(BULK N'+文件名+',SINGLE_BLOB)AS FIle_picture)其中,username ='+用户名+';

...

您可以直接与SQL加载文件。


I'm trying to update my profile picture using varbinary (SQL Server 2008). It don't seem to update the picture that I put in the fileupload. Below is the code I use to update my profile picture. Do help me take a look on which part of my coding did I do wrongly. Thanks.

protected void btnUpload_Click(object sender, EventArgs e)
    {
        String username = (String)Session["username"];

        string filePath = FileUpload1.PostedFile.FileName;
        string filename = Path.GetFileName(filePath);
        string ext = Path.GetExtension(filename);

        string contenttype = String.Empty;

        switch (ext)
        {
            case ".jpg":
                contenttype = "image/jpg";
                break;
        }
        if (contenttype != String.Empty)
        {
            Stream fs = FileUpload1.PostedFile.InputStream;

            BinaryReader br = new BinaryReader(fs);

            Byte[] bytes = br.ReadBytes((Int32)fs.Length);

            //insert the file into database
            string strQuery = "Update LoginRegisterOthers Set profilepic = @Data Where username = '" + username + "'";
            SqlCommand cmd = new SqlCommand(strQuery);
            cmd.Parameters.Add("@Data", SqlDbType.Binary).Value = bytes;
            InsertUpdateData(cmd);
            lblMessage.ForeColor = System.Drawing.Color.Green;
            lblMessage.Text = "Profile Updated.";

            Response.Redirect("MemberProfile.aspx");
        }
        else if (contenttype == String.Empty)
        {
            lblMessage.Text = "Please select your image before uploading!";
        }
        else
        {
            lblMessage.ForeColor = System.Drawing.Color.Red;
            lblMessage.Text = "File format not recognised." + " Upload Image formats";
        }
    }

  private Boolean InsertUpdateData(SqlCommand cmd)
    {
        SqlConnection con = new SqlConnection("Data Source=localhost; Initial Catalog=project; Integrated Security=True");
        cmd.CommandType = CommandType.Text;
        cmd.Connection = con;
        try
        {
            con.Open();
            cmd.ExecuteNonQuery();
            return true;
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
            return false;
        }
        finally
        {
            con.Close();
            con.Dispose();
        }
    }

解决方案

try this:

...

//insert the file into database

string strQuery = "Update LoginRegisterOthers Set profilepic = (SELECT BULKCOLUMN FROM OPENROWSET(BULK N'"+filename+"',  SINGLE_BLOB) AS FIle_picture)  Where username = '" + username + "'";

...

You can load a file directly with sql.

这篇关于无法使用VARBINARY更新资料图片的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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