Question

我将图像上传到数据库并将名称和路径存储在数据库中，但实际图像存储在文件夹中。我已成功将它们存储在文件夹中，但它没有将有关图像的信息保存到数据库。

非常感谢任何帮助。下面是我的代码：

    private void StartUpLoad()
    {

        //get the file name of the posted image
        string imgName = FileUpload1.FileName.ToString();

        //sets the image path
        string imgPath = "images/" + imgName;

        //then save it to the Folder
        FileUpload1.SaveAs(Server.MapPath(imgPath));

        //get the size in bytes that
        int imgSize = FileUpload1.PostedFile.ContentLength;

        //validates the posted file before saving
        if (FileUpload1.PostedFile != null && FileUpload1.PostedFile.FileName != "")
        {
            if (FileUpload1.PostedFile.ContentLength > 5120) // 5120 KB means 5MB
            {
                Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Alert", "alert('File is too big')", true);
            }

            else
            {
                //save the file
                //Call the method to execute Insertion of data to the Database
                ExecuteInsert(imgName, imgSize, imgPath);
                Response.Write("Save Successfully!");
            }
        }
    }

    private string GetConnectionString()
    {
        //sets the connection string from your web config file. "DBConnection" is the name of your Connection String
        return System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    }

    private void ExecuteInsert(string name, int size, string path)
    {
        SqlConnection conn = new SqlConnection(GetConnectionString());
        string sql = "INSERT INTO ImageInfo (ImageName, ImageSize, ImagePath) VALUES "
                    + " (@ImgName,@ImgSize,@ImgPath)";
        try
        {
            conn.Open();

            SqlCommand cmd = new SqlCommand(sql, conn);
            SqlParameter[] param = new SqlParameter[3];

            param[0] = new SqlParameter("@ImgName", SqlDbType.NVarChar, 50);
            param[1] = new SqlParameter("@ImgSize", SqlDbType.BigInt, 9999);
            param[2] = new SqlParameter("@ImgPath", SqlDbType.VarChar, 50);

            param[0].Value = name;
            param[1].Value = size;
            param[2].Value = path;

            for (int i = 0; i < param.Length; i++)
            {
                cmd.Parameters.Add(param[i]);
            }

            cmd.CommandType = CommandType.Text;
            cmd.ExecuteNonQuery();
        }

        catch (System.Data.SqlClient.SqlException ex)
        {
            string msg = "Insert Error:";
            msg += ex.Message;       
        }

        finally
        {
            conn.Close();
        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        StartUpLoad();
    }

以下是我的asp.net代码

<div>
    <asp:FileUpload ID="FileUpload1" runat="server" />
    <br />
    <asp:Button ID="Button1" runat="server" Text="Save" onclick="Button1_Click" />
</div>

Answer 1

您的图片路径和名称仅设置为允许50个字符，并且您的图片路径和名称很可能比此长。检查调试中这些值的大小。如果它们超过50个字符，则数据库拒绝插入。

Answer 2

为什么不调试代码，将insert命令复制/粘贴到数据库管理器中，看看它是否会引发异常。

ASP.NET C＃ - 图像路径未保存在数据库中

2 个答案: