如何使用 asp.net webapi 将图像保存在数据库中

Question

I am working on an API. Everything is getting done smoothly so far, but I have to save images to the database in the API. Scenario, let's say I have a class of Person with three properties {Name, Age, and (byte[])Image} . How can add the Person's image in the database through API?

Thanks.

public IHttpActionResult Create([FromBody] Person person) { }

Answer 1

To achieve that you will need to use VarBinary in order to pass the image parameter, like in this example:

public static void InsertByteArrayintoSqlDatabase()
{
    string sampleText = "Hello World!";

    byte[] byteData = Encoding.UTF8.GetBytes(sampleText);

    using (SqlConnection sqlconnection = new SqlConnection(@"Data Source=.SQLExpress; 
Initial Catalog=MorganDB; Integrated Security=SSPI;"))
    {
        sqlconnection.Open();

        // create table if not exists 
        string createTableQuery = @"Create Table [MyTable](ID int, [BinData] varbinary(max))";
        SqlCommand command = new SqlCommand(createTableQuery, sqlconnection);
        command.ExecuteNonQuery();

        string insertXmlQuery = @"Insert Into [MyTable] (ID,[BinData]) Values(1,@BinData)";

        // Insert Byte [] Value into Sql Table by SqlParameter
        SqlCommand insertCommand = new SqlCommand(insertXmlQuery, sqlconnection);
        SqlParameter sqlParam = insertCommand.Parameters.AddWithValue("@BinData", byteData);
        sqlParam.DbType = DbType.Binary;
        insertCommand.ExecuteNonQuery();
    }

Taken from https://morgantechspace.com/2014/05/how-to-store-and-read-byte-array-in-sql-server-using-csharp.html

I do not recommend storing images as they are in the database. Instead, it makes much more sense to store them as files and store their name/path in the database.