小5聊asp.net和asp.net core不同点积累

Posted 2021-10-09 小5聊

从asp.net framework框架切换到asp.net core框架，同样的功能，写法不一样

1、Request获取地址参数方法

 1）framework

Request.QueryString["echoStr"]

2）core

HttpContext.Request.Query["echoStr"]

2、Response.Write()

1）framework

Response.Write(echoString);
Response.End();

2）core 

/// <summary>
/// "text/html";
/// </summary>
/// <param name="response"></param>
/// <param name="content"></param>
public static void WriteTextHtml(this HttpResponse response, string content)
{
    response.ContentType = "text/html";
    using (StreamWriter sw = new StreamWriter(response.Body))
    {
        sw.Write(content);
    }
}

/// <summary>
/// "application/json";
/// </summary>
/// <param name="response"></param>
/// <param name="content"></param>
public static void WriteJson(this HttpResponse response, string content)
{
    response.ContentType = "application/json";
    using (StreamWriter sw = new StreamWriter(response.Body))
    {
        sw.Write(content);
    }
}

3、Request和Response

1）framework

HttpRequestBase Request = new HttpRequestWrapper(HttpContext.Current.Request);
HttpResponseBase Response = new HttpResponseWrapper(HttpContext.Current.Response);

2）core

var Request = HttpContextHelper.HttpContext.Current.Request;
var Response = HttpContextHelper.HttpContext.Current.Response;

 3）HttpContextHelper，点击查看详细

4、Request.InputStream

1）framework

public static string ReturnString()
{
    HttpRequestBase Request = new HttpRequestWrapper(HttpContext.Current.Request);

    string postString = string.Empty;
    if (Request.HttpMethod.ToUpper() == "POST")
    {
        //Request.InputStream - 只读 - 读取一次值后，会导致读取值结束，实质上就是指针移到了最后面
        Stream stream = Request.InputStream;//new MemoryStream();
        byte[] bytes = new byte[stream.Length];
        stream.Read(bytes, 0, bytes.Length);
        //设置当前流的位置为流的开始
        stream.Seek(0, SeekOrigin.Begin);

        Byte[] postBytes = new Byte[stream.Length];
        stream.Read(postBytes, 0, (Int32)stream.Length);
        postString = Encoding.UTF8.GetString(postBytes);
    }

    return postString;
}
#endregion

2）core

public static string ReturnString()
{
    var Request = HttpContextHelper.HttpContext.Current.Request;

    if (Request.Method.ToUpper() == "POST".ToUpper())
    {
        Request.EnableBuffering();
        var stream = Request.Body;
        long? length = Request.ContentLength;
        if (length != null && length > 0)
        {
            // 使用这个方式读取，并且使用异步
            StreamReader streamReader = new StreamReader(stream, Encoding.UTF8);
            postString = streamReader.ReadToEndAsync().Result;
        }
        Request.Body.Position = 0;
    }

    return postString;
}
#endregion

未完待续。。。