c#实现房贷计算的方法源码-创新互联

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创新互联专业为企业提供七星关区网站建设、七星关区做网站、七星关区网站设计、七星关区网站制作等企业网站建设、网页设计与制作、七星关区企业网站模板建站服务，十载七星关区做网站经验，不只是建网站，更提供有价值的思路和整体网络服务。ic void ProcessRequest(HttpContext context) { context.Response.ContentType = "application/json"; string json=string.Empty; string dktype = (!string.IsNullOrEmpty(context.Request.Form["dktype"]) ? context.Request.Form["dktype"].ToString().Trim() : "0");//贷款方式 string calculatype = (!string.IsNullOrEmpty(context.Request.Form["calculatype"]) ? context.Request.Form["calculatype"].ToString().Trim() : "0");//计算方式 string paymentType = (!string.IsNullOrEmpty(context.Request.Form["paymentType"]) ? context.Request.Form["paymentType"].ToString().Trim() : "0");//还款方式 string unitPrice = (!string.IsNullOrEmpty(context.Request.Form["unitPrice"]) ? context.Request.Form["unitPrice"].ToString().Trim() : "0");//单价 string acreage =(!string.IsNullOrEmpty(context.Request.Form["acreage"])?context.Request.Form["acreage"].ToString().Trim():"0");//面积 string mortgage = (!string.IsNullOrEmpty(context.Request.Form["mortgage"])?context.Request.Form["mortgage"].ToString().Trim():"0");//按揭成数 string loanceiling = (!string.IsNullOrEmpty(context.Request.Form["loanceiling"]) ? context.Request.Form["loanceiling"].ToString().Trim() : "0");//贷款总额 string countYears = (!string.IsNullOrEmpty(context.Request.Form["countYears"]) ? context.Request.Form["countYears"].ToString().Trim() : "0");//按揭年数 string lilv = (!string.IsNullOrEmpty(context.Request.Form["lilv"]) ? context.Request.Form["lilv"].ToString().Trim() : "0");//年利率 //组合型贷款 string syx_loanceiling = (!string.IsNullOrEmpty(context.Request.Form["syx_loanceiling"]) ? context.Request.Form["syx_loanceiling"].ToString().Trim() : "0");//商业贷款 string gjj_loanceiling = (!string.IsNullOrEmpty(context.Request.Form["gjj_loanceiling"]) ? context.Request.Form["gjj_loanceiling"].ToString().Trim() : "0");//公积金贷款 string sy_lilvValues = (!string.IsNullOrEmpty(context.Request.Form["sy_lilvValues"]) ? context.Request.Form["sy_lilvValues"].ToString().Trim() : "0");//商业贷款利率 string gjj_lilvValues = (!string.IsNullOrEmpty(context.Request.Form["gjj_lilvValues"]) ? context.Request.Form["gjj_lilvValues"].ToString().Trim() : "0");//公积金贷款利率 switch (dktype) { case "sydk"://商业贷款 case "gjjdk"://公积金贷款 switch (calculatype) { case "calcula_one"://根据面积，单价计算 json = returnResult(double.Parse(unitPrice), double.Parse(acreage), double.Parse(mortgage), Utils.ObjToInt(countYears, 1), double.Parse(lilv), paymentType); break; case "calcula_two"://根据贷款总额计算 json = returnResult(double.Parse(loanceiling), int.Parse(countYears), double.Parse(lilv), paymentType); break; } break; case "zhxdk"://组合型贷款 json = returnResult(double.Parse(syx_loanceiling), double.Parse(sy_lilvValues), double.Parse(gjj_loanceiling), double.Parse(gjj_lilvValues), Utils.ObjToInt(countYears,1), paymentType); break; } context.Response.Write(json); } ///

/// 商业贷款-根据面积，单价计算 ///

/// 单价 /// 面积 /// 按揭成数 /// 按揭年数 /// 年利率 /// 还款方式 /// private string returnResult(double unitPrice, double acreage, double mortgage, int countYears, double lilv, string paymentType) { StringBuilder json = new StringBuilder(); double newlilv = lilv / 100/12;//月利率 double purchase=0;//房款总额; double Loan=0;//贷款总额 double monthlypayments=0;//平均月供 double Total=0;//还款总额 double Interest=0;//总利息 double Shoufu=0;//首付 switch (paymentType.Trim()) { case "debx"://等额本息 purchase = Math.Round(unitPrice * acreage,2); Loan = Math.Round(purchase * mortgage,2); monthlypayments =Math.Round((Loan * newlilv * Math.Pow(1 + newlilv, countYears * 12)) / (Math.Pow(1 + newlilv, countYears * 12) - 1),2); Total = Math.Round(monthlypayments * countYears * 12,2); Interest = Math.Round(Total - Loan,2); Shoufu = Math.Round(purchase - Loan,2); json.Append("{"purchase":"" + purchase.ToString() + "","Loan":"" + Loan.ToString() + "","Forthemonth":"" + monthlypayments.ToString() + "","Total":"" + Total.ToString() + "","Interest":"" + Interest.ToString() + "","Shoufu":"" + Shoufu.ToString() + "","months":"" + countYears * 12 +"(月)"+ ""}"); break; case "debj"://等额本金 purchase = Math.Round(unitPrice * acreage,2); Loan =Math.Round(purchase * mortgage,2); string monthsPay = string.Empty; for (int i = 0; i < countYears * 12; i++) { monthlypayments =Loan / (countYears * 12) + (Loan - Loan / (countYears * 12) * i) * newlilv; monthsPay +="第"+ (i + 1) + "个月," + Math.Round(monthlypayments,2) + "(元)\r\n";//月均金额 Total =monthlypayments + Total;//还款总额 } Interest =Math.Round(Total - Loan,2); Shoufu = Math.Round(purchase - Loan,2); json.Append("{"purchase":"" + purchase.ToString() + "","Loan":"" + Loan.ToString() + "","Forthemonth":"" + monthsPay.ToString() + "","Total":"" + Math.Round(Total,2) + "","Interest":"" + Interest.ToString() + "","Shoufu":"" + Shoufu.ToString() + "","months":"" + countYears * 12 + "(月)" + ""}"); break; } return json.ToString(); } ///

/// 商业贷款-根据贷款总额计算 ///

/// 贷款总额 /// 按揭年数 /// 年利率 /// 还款方式 /// private string returnResult(double loanceiling, int countYears, double lilv, string paymentType) { StringBuilder json = new StringBuilder(); double newlilv = lilv / 100 / 12;//月利率 double Loan = loanceiling;//贷款总额 double monthlypayments = 0;//平均月供 double Total = 0;//还款总额 double Interest = 0;//总利息 switch (paymentType.Trim()) { case "debx"://等额本息 monthlypayments = Math.Round((Loan * newlilv * Math.Pow(1 + newlilv, countYears * 12)) / (Math.Pow(1 + newlilv, countYears * 12) - 1), 2); Total = Math.Round(monthlypayments * countYears * 12, 2); Interest = Math.Round(Total - Loan, 2); json.Append("{"purchase":"略","Loan":"" + Loan.ToString() + "","Forthemonth":"" + monthlypayments.ToString() + "","Total":"" + Total.ToString() + "","Interest":"" + Interest.ToString() + "","Shoufu":"0","months":"" + countYears * 12 + "(月)"+""}"); break; case "debj"://等额本金 string monthsPay = string.Empty; for (int i = 0; i < countYears * 12; i++) { monthlypayments =Loan / (countYears * 12) + (Loan - Loan / (countYears * 12) * i) * newlilv; monthsPay +="第"+ (i + 1) + "个月," + Math.Round(monthlypayments,2) + "(元)\r\n";//月均金额 Total =monthlypayments + Total;//还款总额 } Interest = Math.Round(Total - Loan, 2); json.Append("{"purchase":"略","Loan":"" + Math.Round(Loan,2) + "","Forthemonth":"" + monthsPay.ToString() + "","Total":"" + Math.Round(Total, 2) + "","Interest":"" + Interest.ToString() + "","Shoufu":"0","months":"" + countYears * 12 + "(月)" + ""}"); break; } return json.ToString(); } ///

/// 组合型贷款 ///

/// 商业贷款额 /// 商业贷款利率（年利率） /// 公积金贷款额 /// 公积金贷款额利率（年利率） /// 贷款期限 /// 还款方式 /// private string returnResult(double syx_loanceiling, double sy_lilvValues, double gjj_loanceiling,double gjj_lilvValues, int countYears,string paymentType) { StringBuilder json = new StringBuilder(); double sy_newlilv = sy_lilvValues / 100 / 12;//月利率 double sy_Loan = syx_loanceiling;//贷款总额 double sy_monthlypayments = 0;//平均月供 double sy_Total = 0;//商业还款总额 double sy_Interest = 0;//商业贷款利息 double gjj_newlilv = gjj_lilvValues / 100 / 12;//月利率 double gjj_Loan = gjj_loanceiling;//贷款总额 double gjj_monthlypayments = 0;//平均月供 double gjj_Total = 0;//公积金还款总额 double gjj_Interest = 0;//公积金贷款利息 switch (paymentType.Trim()) { case "debx"://等额本息 //商业贷款 sy_monthlypayments = Math.Round((sy_Loan * sy_newlilv * Math.Pow(1 + sy_newlilv, countYears * 12)) / (Math.Pow(1 + sy_newlilv, countYears * 12) - 1), 2); sy_Total = Math.Round(sy_monthlypayments * countYears * 12, 2); sy_Interest = Math.Round(sy_Total - sy_Loan, 2); //公积金贷款 gjj_monthlypayments = Math.Round((gjj_Loan * gjj_newlilv * Math.Pow(1 + gjj_newlilv, countYears * 12)) / (Math.Pow(1 + gjj_newlilv, countYears * 12) - 1), 2); gjj_Total = Math.Round(gjj_monthlypayments * countYears * 12, 2); gjj_Interest = Math.Round(gjj_Total - gjj_Loan, 2); double monthlypayments = sy_monthlypayments + gjj_monthlypayments; double Total = sy_Total + gjj_Total; double Interest = sy_Interest + gjj_Interest; double Loan=Math.Round( sy_Loan + gjj_Loan,2); json.Append("{"purchase":"略","Loan":"" + Loan.ToString() + "","Forthemonth":"" + monthlypayments.ToString() + "","Total":"" + Total.ToString() + "","Interest":"" + Interest.ToString() + "","Shoufu":"0","months":"" + countYears * 12 + "(月)" + ""}"); break; case "debj"://等额本金 string monthsPay = string.Empty; double newmonthlypayments;; double newTotal=0; double newInterest; double newLoan; for (int i = 0; i < countYears * 12; i++) { sy_monthlypayments = sy_Loan / (countYears * 12) + (sy_Loan - sy_Loan / (countYears * 12) * i) * sy_newlilv; gjj_monthlypayments =gjj_Loan / (countYears * 12) + (gjj_Loan - gjj_Loan / (countYears * 12) * i) * gjj_newlilv; newmonthlypayments = sy_monthlypayments + gjj_monthlypayments; monthsPay +="第"+ (i + 1) + "个月," + Math.Round(newmonthlypayments) + "(元)\r\n";//月均金额 sy_Total = sy_monthlypayments + sy_Total; gjj_Total = gjj_monthlypayments + gjj_Total; newTotal = gjj_Total + sy_Total;//还款总额 } sy_Interest =sy_Total - sy_Loan; gjj_Interest =gjj_Total - gjj_Loan; newInterest = gjj_Interest + sy_Interest; newLoan = sy_Loan + gjj_Loan; json.Append("{"purchase":"略","Loan":"" + Math.Round(newLoan, 2) + "","Forthemonth":"" + monthsPay.ToString() + "","Total":"" + Math.Round(newTotal,2) + "","Interest":"" + Math.Round(newInterest, 2) + "","Shoufu":"0","months":"" + countYears * 12 + "(月)" + ""}"); break; } return json.ToString(); }
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