ajax+asp.net/asp/php+mssql无刷新聊天室

ajax+asp.net+mssql实现的ajax无刷新聊天室，支持html web编辑器。ajax+asp.net+mssql无刷新聊天室

为了加快速度，使用了存储过程。

asp及php版本请看下面的文章

ajax+asp+mssql无刷新聊天室

ajax+php+mssql无刷新聊天室

此例子也可以作为mssql存储过程使用的示例，如php调用mssql的存储过程，php获取mssql数据库的输出参数。

要使用不同的动态页面，只需要更改lib.js文件中RequstUrl变量的值即可。

完整示例下载

效果如下

ajax.cs

using System; using System.Web; using System.Data; using System.Configuration; using System.Data.SqlClient; /// <summary> ///操作类 /// </summary> public class Ajax { /// <summary> /// 检查字符串是否为空 /// </summary> /// <param name="v">字符串</param> /// <returns></returns> private static bool IsNull(string v) { if (v == null || v.Trim() == "") return true; else return false; } /// <summary> /// 转义js字符串以便输出 /// </summary> /// <param name="v">字符串</param> /// <returns></returns> private static string Js(string v) { return v.Replace("'", "//'"); } /// <summary> /// 用户登录 /// </summary> /// <returns></returns> public static string Login() { HttpRequest Request = HttpContext.Current.Request; string rStr = ""; string UserName = Request.Form["nn"]; if (IsNull(UserName)) { rStr = "success:false,err:'暱称不能为空！'"; } else if (UserName.Length > 20) { rStr = "success:false,err:'暱称不能超过20个字符！'"; } else { string UserId = "", Key = ""; SqlConnection cn = new SqlConnection(ConfigurationSettings.AppSettings["db"]); cn.Open(); try { SqlCommand cm = new SqlCommand("ajaxLogin", cn); cm.CommandType = CommandType.StoredProcedure; cm.Parameters.Add(new SqlParameter("@UserName", SqlDbType.NVarChar, 50)); cm.Parameters["@UserName"].Value = UserName; //==========输出参数 cm.Parameters.Add(new SqlParameter("@UserId", SqlDbType.NVarChar, 18)); cm.Parameters["@UserId"].Direction = ParameterDirection.Output; cm.Parameters.Add(new SqlParameter("@UserKey", SqlDbType.NVarChar, 5)); cm.Parameters["@UserKey"].Direction = ParameterDirection.Output; cm.ExecuteNonQuery(); UserId = cm.Parameters["@UserId"].Value.ToString().Trim(); Key = cm.Parameters["@UserKey"].Value.ToString().Trim(); if (UserId == "-1") rStr = @"success:false,err:'发生错误，请稍后再试！'"; else if (UserId == "0") rStr = @"success:false,err:'已经存在此用户暱称，请修改您的暱称！'"; else rStr += "success:true,UserId:'" + UserId + "',Key:'" + Key + "'"; cm.Dispose(); } catch (Exception e) { rStr = @"success:false,err:'原因//n" + Js(e.Message) + "'"; } cn.Close(); } return rStr; } /// <summary> /// 删除用户信息,“用户ID+key”来删除，key参数是防止乱删除用户信息的 /// </summary> /// <returns></returns> public static string Logout() { HttpRequest Request = HttpContext.Current.Request; string rStr = "", UserId = Request.Form["uid"], Key = Request.Form["key"]; if (IsNull(UserId) || IsNull(Key)) return "success:false,err:'用户信息丢失！'"; SqlConnection cn = new SqlConnection(ConfigurationSettings.AppSettings["db"]); cn.Open(); try { SqlCommand cm = new SqlCommand("ajaxLogout", cn); cm.CommandType = CommandType.StoredProcedure; cm.Parameters.Add(new SqlParameter("@UserId", SqlDbType.NVarChar, 18)); cm.Parameters["@UserId"].Value = UserId; cm.Parameters.Add(new SqlParameter("@UserKey", SqlDbType.NVarChar, 5)); cm.Parameters["@UserKey"].Value = Key; cm.Parameters.Add(new SqlParameter("@Result", SqlDbType.Int)); cm.Parameters["@Result"].Direction = ParameterDirection.Output; cm.ExecuteNonQuery(); if(cm.Parameters["@UserId"].Value.ToString().Trim()=="0")rStr = "success:false,err:'用户信息不存在！'"; else rStr="success:true"; cm.Dispose(); } catch (Exception e) { } cn.Close(); return rStr; } /// <summary> /// 发表信息 /// </summary> /// <returns>发表信息,Json格式</returns> public static string Say() { HttpRequest Request = HttpContext.Current.Request; string From = Request.Form["from"], To = Request.Form["to"] , Key = Request.Form["key"], Msg = Request.Form["ct"], rStr = ""; if (IsNull(From) || IsNull(Key) || IsNull(To) || IsNull(Msg)) rStr = "success:false,err:'信息传递不完整！'"; else { SqlConnection cn = new SqlConnection(ConfigurationSettings.AppSettings["db"]); cn.Open(); try { SqlCommand cm = new SqlCommand("ajaxSay", cn); cm.CommandType = CommandType.StoredProcedure; cm.Parameters.Add(new SqlParameter("@UserKey", SqlDbType.NVarChar, 5)); cm.Parameters["@UserKey"].Value = Key; cm.Parameters.Add(new SqlParameter("@From", SqlDbType.NVarChar, 18)); cm.Parameters["@From"].Value = From; cm.Parameters.Add(new SqlParameter("@To", SqlDbType.NVarChar, 18)); cm.Parameters["@To"].Value = To; cm.Parameters.Add(new SqlParameter("@Msg", SqlDbType.NVarChar, 800)); cm.Parameters["@Msg"].Value = Msg; cm.Parameters.Add(new SqlParameter("@Result", SqlDbType.Int)); cm.Parameters["@Result"].Direction = ParameterDirection.Output; cm.ExecuteNonQuery(); if (cm.Parameters["@Result"].Value.ToString() == "0") rStr = "sucess:false,err:'发表失败！//n原因：接收者已经不存在！'"; else rStr = "success:true"; cm.Dispose(); } catch (Exception e) { rStr = "sucess:false,err:'发表失败！原因//n" + Js(e.Message) + "'"; } cn.Close(); } return rStr; } /// <summary> /// 用户列表 /// </summary> /// <returns>用户列表信息,Json格式</returns> public static string ReadUser() { HttpRequest Request = HttpContext.Current.Request; string rStr = "", UserId = Request.Form["uid"]; if (IsNull(UserId)) rStr += "success:false,err:'用户id丢失！'"; else { SqlConnection cn = new SqlConnection(ConfigurationSettings.AppSettings["db"]); cn.Open(); try { SqlCommand cm = new SqlCommand("ajaxReadUser", cn); cm.CommandType = CommandType.StoredProcedure; cm.Parameters.Add(new SqlParameter("@UserId", SqlDbType.NVarChar, 18)); cm.Parameters["@UserId"].Value = UserId; string j = ""; SqlDataReader dr = cm.ExecuteReader(); while (dr.Read()) j += ",{id:'" + dr[0] + "',nn:'" + Js(dr[1].ToString()) + "'}"; dr.Close(); cm.Dispose(); rStr = "success:true,data:[" + (j == "" ? "" : j.Substring(1)) + "]"; } catch (Exception e) { rStr = @"success:false,err:'发生如下错误//n" + Js(e.Message) + "'"; } cn.Close(); } return rStr; } /// <summary> /// 信息列表 /// </summary> /// <returns>信息列表,Json格式</returns> public static string Read() { HttpRequest Request = HttpContext.Current.Request; string rStr = ""; string UserId = Request.Form["uid"], Key = Request.Form["key"]; if (IsNull(UserId) || IsNull(Key)) rStr = "success:false,err:'用户信息丢失！'"; else { SqlConnection cn = new SqlConnection(ConfigurationSettings.AppSettings["db"]); cn.Open(); try { SqlCommand cm = new SqlCommand("ajaxRead", cn); cm.CommandType = CommandType.StoredProcedure; cm.Parameters.Add(new SqlParameter("@UserId", SqlDbType.NVarChar, 18)); cm.Parameters["@UserId"].Value = UserId; cm.Parameters.Add(new SqlParameter("@UserKey", SqlDbType.NVarChar, 5)); cm.Parameters["@UserKey"].Value = Key; SqlDataReader dr = cm.ExecuteReader(); string j = ""; while (dr.Read()) j += ",'" + Js(dr[0].ToString()) + "'"; dr.Close(); cm.Dispose(); rStr = "success:true,data:[" + (j == "" ? "" : j.Substring(1)) + "]"; } catch (Exception e) { rStr = "success:false,err:'发生以下错误" + Js(e.Message) + "'"; } cn.Close(); } return rStr; } }

op.ashx
<%@ WebHandler Language="C#" Class="op" %> using System; using System.Web; public class op : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.Charset = "gb2312"; context.Response.ContentType = "text/html"; HttpRequest Request = context.Request; string Json = "{"; switch (Request.Form["op"]) { case "login": Json += Ajax.Login(); break; case "logout": Json += Ajax.Logout(); break; case "readuser": Json += Ajax.ReadUser(); break; case "read":Json+=Ajax.Read(); break; case "say": Json += Ajax.Say(); break; default: Json += "success:false,err:'参数错误！'"; break; } Json += "}"; context.Response.Write(Json); } public bool IsReusable { get { return false; } } }

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