Json Ajax参数传递&;Webmethod未启动
本文关键字:Webmethod 启动 amp Ajax 参数传递 Json | 更新日期: 2023-09-27 17:56:09
在我的Ajax函数中,我试图将int参数传递给Webmethod,但没有成功。在这里我粘贴我的代码
Ajax函数
$('#drpChurchNames').on('change', function () {
//alert($(this).val());
LoadFathersToChurch(churchId)
});
function LoadFathersToChurch(churchId) {
var url = '<%=ResolveUrl("WebMethods.aspx/GetFatherNames") %>';
$.ajax({
url: url,
type: "GET",
dataType: "json",
data:'{ Id: " '+churchId +' "}',
contentType: "application/json; charset=utf-8",
success: function (Result) {
$.each(Result.d, function (key, value) {
$("#drprevfather").append($("<option></option>").val
(value.Id).html(value.FatherName));
});
},
error: function (e, x) {
alert(x.ResponseText);
}
});
}
这是我的WebMethod
[WebMethod]
[ScriptMethod(UseHttpGet = true)]
public static List<FatherNames> GetFatherNames(int ChurchId)
{
List<FatherNames> FathersList = new List<FatherNames>();
try
{
SqlCommand comChurchNames = new SqlCommand("GetFathers", conDB);
comChurchNames.CommandType = CommandType.StoredProcedure;
comChurchNames.Parameters.Add("@Id", SqlDbType.Int);
comChurchNames.Parameters["@Id"].Value = ChurchId;
if (conDB.State == ConnectionState.Closed)
conDB.Open();
SqlDataReader rdr = comChurchNames.ExecuteReader();
DataTable dt = new DataTable();
dt.Load(rdr);
foreach (DataRow r in dt.Rows)
{
FathersList.Add(new FatherNames
{
Id = (int)r["Id"],
FatherName = r["FatherName"].ToString()
});
}
}
这是我的SP
ALTER PROCEDURE [dbo].[GetFathers]
@SelectIndexName int
AS
BEGIN
Select * from dbo.RevFathers
Where ChurchId = @SelectIndexName
END
您正在传递Id
作为参数,正确的是ChurchId
,就像Web方法签名GetFatherNames(int ChurchId)
一样。
有正确的方法:
$.ajax({
url: url,
type: "GET",
dataType: "json",
data:'{ ChurchId: " '+churchId +' "}',
contentType: "application/json; charset=utf-8",
success: function (Result) {
$.each(Result.d, function (key, value) {
$("#drprevfather").append($("<option></option>").val
(value.Id).html(value.FatherName));
});
},
error: function (e, x) {
alert(x.ResponseText);
}
});
你的web方法真的被执行了吗?如果是,并且您认为它应该返回数据,那么可能是您的Web方法没有返回JSON,因此jQuery可能正在生成并出错,并且没有成功触发。
我在global.asax中有这个配置XML和JSON的输出:
using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System.Web.Http;
放置在app_start 中
GlobalConfiguration.Configuration.Formatters.JsonFormatter.MediaTypeMappings.Add(new QueryStringMapping("type", "json", new MediaTypeHeaderValue("application/json")));
GlobalConfiguration.Configuration.Formatters.XmlFormatter.MediaTypeMappings.Add(new QueryStringMapping("type", "xml", new MediaTypeHeaderValue("application/xml")));
我知道这不是一个直接的答案,但我还不能发表评论,所以我会先问上面的问题,关于网络方法是否被调用。