C# web api方法调用中的参数为null
在我的方法上编写一个web api项目和一个参数(json数组)将进入api null。我正在使用的jquery如下所示:C# web api方法调用中的参数为null,c#,jquery,asp.net-mvc,asp.net-web-api,C#,Jquery,Asp.net Mvc,Asp.net Web Api,在我的方法上编写一个web api项目和一个参数(json数组)将进入api null。我正在使用的jquery如下所示: <script> $(document).ready(function () { $('#btnSubmit').click(function () { var jsRequestAction = { appId: 'appName', custId:
<script>
$(document).ready(function () {
$('#btnSubmit').click(function () {
var jsRequestAction = {
appId: 'appName',
custId: 'custId',
oprId: 'oprId',
businessProcess: 'Requisition',
action: 'Approve',
actionKeys: [
'blah blah 1',
'blah blah 2',
'blah blah 3'
]
};
$.ajax({
type: "POST",
content: "json",
url: "http://localhost/api/appName/custId/oprId",
contentType: "application/json; charset=utf-8",
data: JSON.stringify({ requestAction: jsRequestAction })
});
});
});
</script>
public IList<ResponseAction> ActionCounter(string appName, string custCode, string custUserName, RequestAction requestAction)
{
IList<ResponseAction> actionResponseList = new List<ResponseAction>();
var conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString);
conn.Open();
try
{
foreach (string s in requestAction.actionKeys)
{
var command = new SqlCommand
{
CommandText = "Sql statement",
Connection = conn
};
command.ExecuteNonQuery();
var reply = new ResponseAction();
reply.responseActionKey = s;
reply.responseMessage = "Success";
actionResponseList.Add(reply);
}
return actionResponseList;
}
finally
{
conn.Close();
conn.Dispose();
}
}
public IList<ResponseAction> ActionCounter(RequestAction requestAction)
{
// Do stuff
}
当我调试时,我会逐步执行该方法,当我到达foreach循环时,我会得到一个空对象引用。在“我的局部变量”部分中,requestAction的所有属性都为空。在阅读了几篇相关文章之后,我尝试在对象前面加上[FromBody]标记,但没有任何效果。任何帮助都将不胜感激。您需要确保对象服务器端与您在客户端创建的对象相匹配,以便将请求直接序列化到对象中 因此,您的操作方法如下所示:
<script>
$(document).ready(function () {
$('#btnSubmit').click(function () {
var jsRequestAction = {
appId: 'appName',
custId: 'custId',
oprId: 'oprId',
businessProcess: 'Requisition',
action: 'Approve',
actionKeys: [
'blah blah 1',
'blah blah 2',
'blah blah 3'
]
};
$.ajax({
type: "POST",
content: "json",
url: "http://localhost/api/appName/custId/oprId",
contentType: "application/json; charset=utf-8",
data: JSON.stringify({ requestAction: jsRequestAction })
});
});
});
</script>
public IList<ResponseAction> ActionCounter(string appName, string custCode, string custUserName, RequestAction requestAction)
{
IList<ResponseAction> actionResponseList = new List<ResponseAction>();
var conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString);
conn.Open();
try
{
foreach (string s in requestAction.actionKeys)
{
var command = new SqlCommand
{
CommandText = "Sql statement",
Connection = conn
};
command.ExecuteNonQuery();
var reply = new ResponseAction();
reply.responseActionKey = s;
reply.responseMessage = "Success";
actionResponseList.Add(reply);
}
return actionResponseList;
}
finally
{
conn.Close();
conn.Dispose();
}
}
public IList<ResponseAction> ActionCounter(RequestAction requestAction)
{
// Do stuff
}
公共IList操作计数器(请求操作请求操作)
{
//做事
}
其中RequestAction应该与您正在创建的javascript对象匹配。我找到了问题的答案。这是一个改变的问题:
$.ajax({
type: "POST",
content: "json",
url: "http://localhost/api/appName/custId/oprId",
contentType: "application/json; charset=utf-8",
data: JSON.stringify({ requestAction: jsRequestAction })
});
为此:
$.ajax({
type: "POST",
content: "json",
url: "http://localhost/api/appName/custId/oprId",
data: jsRequestAction
});
否则,数据将不会绑定到控制器中的我的模型,所有内容都将被清空。从web api方法中取出除requestAction之外的所有参数,我仍然会得到null。我应该提到的是,我将这个方法从我以前构建的一个WCF rest服务转移过来,这个服务可以正常工作,但是我在WebAPI中遇到了这个问题。