C# 如何在bot框架下保存sqlserver中的文件附件

我已经添加了sql代码。当我从数据中删除image变量时，sql语句成功执行，然后我知道image数据有问题

        var url = state.Image.Attachment.ContentUrl;
        var httpClient = new HttpClient();
        var imageData = await httpClient.GetByteArrayAsync(url);

 string constr = ConfigurationManager.ConnectionStrings["ASPNETConnectionString"].ToString();
                    SqlConnection conn = new SqlConnection(constr);

                    string sql = "INSERT into dbo.mee (name,image,status,guid) VALUES ('" + name + "','" + imageData + "','" + status + "','" + g + "');";
                    SqlCommand cmd = new SqlCommand(sql);
                    cmd.Connection = conn;
                    try
                    {
                        conn.Open();
                        cmd.ExecuteNonQuery();
                        await context.PostAsync($"Your details has been received");
                    }
                    catch (Exception ex)
                    {
                        await context.PostAsync($"cannot connect to database");

                    }
                    finally
                    {
                        conn.Close();
                    }
                 };

    I want to save the image attachment uploaded by the user to sql server database. I used the imageData variable in my sql statement but the image would not save. I have already used varbinary(max) as the data type in my sql table. is there anything wrong with the code above? please i need help. 

---

我将图像转换为Base64。

imageData变量的内容大小是多少？添加用于将数据保存到数据库中的代码。我添加了sql语句，并进一步解释了图像大小小于100MB您不能（也不应该）仅在sql查询中保存要保存的值。请使用预先准备好的语句，如有可能，请参阅

图像大小小于100mb

Hi@oluwatosinessamuelbabalola，您可以尝试将附件文件存储在Azure存储中，并将附件文件的URL保存在SQL数据库中，而不是直接将大文件存储在数据库中。我应该安装什么名称空间来访问StorageFile？System.Windows.storage，System.Windowsi下载了该软件包，但在尝试将其添加到“我的项目”中的引用时出错。有几个不同的版本应适合您的操作系统。你会找到其他你会找到的网站。

       var url = state.Image.Attachment.ContentUrl;
       var httpClient = new HttpClient();
       StorageFile f1 = await httpClient.GetByteArrayAsync(url);
       string imageData = Convert.ToBase64String(File.ReadAllBytes(f1.Path));