Question

如何使用xamarin android web服务在数据库sql server中保存视频并在listview中显示

Answer 1

由于以下原因，我强烈建议不要在您的数据库中存储视频：

1). Doing so would bloat your database size
2). Slow down the performance of the database
3). It opens your application to Denial of Service attacks (DDOS).

您应该期待将视频存储在文件专用存储空间中，例如：

1). Cloud Storage.
2). FTP storage.
3). Server's file system.
4). Etc...

如果您确实希望在数据库中存储视频以进行测试或基准测试，可以尝试以下代码：

 using System;
 using System.Data;
 using System.Data.SqlClient;

 namespace Portal.WebApp.Models
 {
     public class DbBlobSaver
     {
         #region Public Methods
         public void Execute(byte[] fileBytes)
         {
             using (var dbConnection = new SqlConnection("Data Source = .; Initial Catalog = BlobsDatabase; Integrated Security = SSPI"))
             {
                 var command = BuildCommand(dbConnection);
                 var blobParameter = BuildParameter(fileBytes);

                 command.Parameters.Add(blobParameter);

                 try
                 {
                     command.Connection.Open();
                     command.ExecuteNonQuery();
                 }
                 catch (Exception ex)
                 {
                     // Log errors here
                 }
                 finally
                 {
                     command.Connection.Close();
                 }
             }
         }
         #endregion

         #region Private Methods
         private SqlParameter BuildParameter(byte[] fileBytes)
         {
             var blobParameter = new SqlParameter("@BlobFile", SqlDbType.Binary);

             blobParameter.Value = fileBytes;

             return blobParameter;
         }

         private SqlCommand BuildCommand(SqlConnection connection)
         {
             var command = new SqlCommand();
             command.Connection = connection;
             command.CommandType = CommandType.Text;
             command.CommandText = "INSERT INTO BlobsTable(BlobFile)" + "VALUES (@BlobFile)";

             return command;
         }
         #endregion
     }
 }

如何使用xamarin android web服务在数据库sql server中保存视频并在listview中显示

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