Signature: Implement parameter dictionary sort, then stitch as url Parameter form

In many places request parameters need to be handled such as:

Steps

1. Parameter dictionary ordering.

2. Stitching characters.

        /// <summary>        ///Generate Signature/// </summary>        /// <param name= "Paramlst" >parameter list</param>        /// <param name= "Istoupper" >whether to turn uppercase</param>        /// <param name= "Isdirect" >whether to add the signature key directly</param>        /// <returns></returns>         Public Static stringGeneratesign (list<keyvaluepair<string,string>> LST,stringPrivatekey) {Comparison<KeyValuePair<string,string>> comparer =Newcomparison<keyvaluepair<string,string>>(Comparekeyvaluepair); Lst.            Sort (comparer); varParamlst = lst. Where (p =!)string. IsNullOrEmpty (P.value)).            ToList (); stringSignstr =string. Join ("&", Paramlst. Select (p = p.key +"="+ p.value)) +Privatekey; returnSign (SIGNSTR,"UTF-8"); }

        /// <summary>        /// Compare sort positions        by key /// </summary>        Private Static int Comparekeyvaluepair (keyvaluepair<stringstring> P1, keyvaluepair<string string> p2)        {            returnstring. Compare (P1. Key, p2. Key);        }        

3.MD5 encryption

/// <summary>        ///Signature String/// </summary>        /// <param name= "Prestr" >a string that needs to be signed</param>        /// <param name= "key" >secret key</param>        /// <param name= "Inputcharset" >encoding Format</param>        /// <returns>Signature Results</returns>         Public Static stringSign (stringPRESTR,stringInputcharset) {StringBuilder SB=NewStringBuilder (); MD5 MD5=NewMD5CryptoServiceProvider (); byte[] t =Md5.computehash (encoding.getencoding (Inputcharset).            GetBytes (PRESTR)); foreach(byteT1incht) {sb. Append (t1. ToString ("X2")); }            returnsb.        ToString (); }

Signature: Implements the parameter dictionary sort, then stitching as url Parameter form