Request简单总结

Request简单使用:

说起Request,在项目中基本都必须有用到,这里记录一下我了解到的关于Request的内容:

直接代码:

非常基本的当然有Reqeust.Form和Request.QueryString,两者的区别这里不多说.

String name=Request.Form["Name"];//post请求或者表单上传

String id=Request.QueryString["ID"];//get请求

String value=Request["Value"];//拿到所有过来的参数

其实QueryString也可以当成一个数组

int Count = System.Web.HttpContext.Current.Request.QueryString.Count;//Count属性可以得到传递过来的参数个数

//通过Keys属性得到"键值对"中的键值
for (int i = 0; i < Count; i++)
{
    if(System.Web.HttpContext.Current.Request.QueryString.Keys[i].ToLower().Equals("page"))
    {
       String value=System.Web.HttpContext.Current.Request.QueryString[i];
    }
}

清除QueryString:

        /// <summary>
        /// 清除Request.QueryString
        /// </summary>
        /// <param name="name"></param>
        public  void RemoveQueryString(string name)
        {
            enableQueryStringWriting();
            Request.QueryString.Remove(name);
        }

        private void enableQueryStringWriting()
        {
            var qs = Request.QueryString;

            var queryString = (NameValueCollection)Request.GetType().GetField(
                "_queryString",
                BindingFlags.NonPublic | BindingFlags.Instance
            ).GetValue(Request);

            PropertyInfo readOnlyInfo = queryString.GetType().GetProperty(
                "IsReadOnly",
                BindingFlags.NonPublic | BindingFlags.Instance
            );

            readOnlyInfo.SetValue(queryString, false, null);
        } 

最后提一下,上述是通过C#代码来操作Request对象,正常情况下,使用JS来操作也是比较多的,代码如下:

//获取QueryString的数组

function getQueryString(){

     var result = location.search.match(new RegExp("[?&][^?&]+=[^?&]+","g")); 

     if(result == null){

         return "";

     }

     for(var i = 0; i < result.length; i++){

         result[i] = result[i].substring(1);

     }

     return result;

}
//根据QueryString参数名称获取值

function getQueryStringByName(name){

     var result = location.search.match(new RegExp("[?&]" + name+ "=([^&]+)","i"));

     if(result == null || result.length < 1){

         return "";

     }

     return result[1];

}
//根据QueryString参数索引获取值

function getQueryStringByIndex(index){

     if(index == null){

         return "";

     }

     var queryStringList = getQueryString();

     if (index >= queryStringList.length){

         return "";

     }

     var result = queryStringList[index];

     var startIndex = result.indexOf("=") + 1;

     result = result.substring(startIndex);

     return result;

}
    
    

END!