【发布时间】：2018-05-26 19:48:08
【问题描述】：
我正在将 wcf rest 服务用于 angular js 应用程序。我正在尝试根据从 angular js 应用程序发布的帐号检索单个记录。但问题是当我单击提交按钮并将值发布到 wcf 服务时，我收到以下错误..
服务器在处理请求时遇到错误。异常消息是“参数化查询 '(@Account_Number nvarchar(4000))SELECT * FROM Current_Account_De' 需要参数 '@Account_Number'，但未提供该参数。”。有关更多详细信息，请参阅服务器日志。异常堆栈跟踪是：
我调试应用程序，将鼠标悬停在方法上，接收的值为 NULL。
这是界面。
[OperationContract]
[WebInvoke(Method = "POST",
RequestFormat = WebMessageFormat.Json,
ResponseFormat = WebMessageFormat.Json,
UriTemplate = "/GetAccountDetails")]
string GetAccountDetails(string Account_Number);
这是实现。
public string GetAccountDetails(string Account_Number)
{
//Convert.ToInt32(Account_Number);
List<object> customers = new List<object>();
string sql = "SELECT * FROM Current_Account_Details WHERE Account_Number=@Account_Number";
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using (SqlCommand cmd = new SqlCommand(sql))
{
cmd.Parameters.AddWithValue("@Account_Number",Account_Number);
cmd.Connection = conn;
conn.Open();
using (SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
customers.Add(new
{
Account_Number = sdr["Account_Number"],
Account_Creation_Date = sdr["Account_Creation_Date"],
Account_Type = sdr["Account_Type"],
Branch_Sort_Code = sdr["Branch_Sort_Code"],
Account_Fees = sdr["Account_Fees"],
Account_Balance = sdr["Account_Balance"],
Over_Draft_Limit = sdr["Over_Draft_Limit"],
});
}
}
conn.Close();
}
return (new JavaScriptSerializer().Serialize(customers));
}
}
这是脚本代码。
var app = angular.module("WebClientModule", [])
.controller('Web_Client_Controller', ["$scope", 'myService', function ($scope, myService) {
var Account_Number = $scope.Account_Number;
$scope.search = function (Account_Number) {
var promisePostSingle = myService.postbyAccount_Number(Account_Number);
promisePostSingle.then(function (pl) {
var res = pl.data;
$scope.Account_Number = res.Account_Number;
$scope.Account_Creation_Date = res.Account_Creation_Date;
$scope.Account_Type = res.Account_Type;
$scope.Branch_Sort_Code = res.Branch_Sort_Code;
$scope.Account_Fees = res.Account_Fees;
$scope.Account_Balance = res.Account_Balance;
$scope.Over_Draft_Limit = res.Over_Draft_Limit;
// $scope.IsNewRecord = 0;
},
function (errorPl) {
console.log('failure loading Employee', errorPl);
});
}
}]);
app.service("myService", function ($http) {
this.postbyAccount_Number = function (Account_Number) {
return $http.post("http://localhost:52098/HalifaxIISService.svc/GetAccountDetails?Account_Number=" + Account_Number);
};
})
这是 HTML 代码。
@{
Layout = null;
}
<!DOCTYPE html>
<html ng-app="WebClientModule">
<head>
<meta name="viewport" content="width=device-width" />
<title>AccountBalance</title>
<script src="~/Scripts/angular.min.js"></script>
<script src="~/RegistrationScript/AccountBalance.js"></script>
</head>
<body>
<div data-ng-controller="Web_Client_Controller">
Enter Account_Number: <input type="text" ng-model="Account_Number" />
<input type="button" value="search" ng-click="search(Account_Number)" />
<table id="tblContainer" ng-show="IsVisible" >
<tr>
<td>
<table style="border: solid 2px Green; padding: 5px;">
<tr style="height: 30px; background-color: skyblue; color: maroon;">
<th></th>
<th>Account Number</th>
<th>Account Creation Date</th>
<th>Account Type</th>
<th>Branch Sort Code</th>
<th>Account Fees</th>
<th>Account Balance</th>
<th>Over Draft Limit</th>
<th></th>
<th></th>
</tr>
<tbody data-ng-repeat="user in Users">
<tr>
<td></td>
<td><span>{{user.Account_Number}}</span></td>
<td><span>{{user.Account_Creation_Date}}</span></td>
<td><span>{{user.Account_Type}}</span></td>
<td><span>{{user.Branch_Sort_Code}}</span></td>
<td><span>{{user.Account_Fees}}</span></td>
<td><span>{{user.Account_Balance}}</span></td>
<td><span>{{user.Over_Draft_Limit}}</span></td>
<td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td></td>
</tr>
<tr>
<td>
<div style="color: red;">{{Message}}</div>
</td>
</tr>
</table>
</div>
</body>
</html>
这是调试模式的屏幕截图..
【问题讨论】：
标签： javascript c# angularjs rest wcf