大家好，这是我的代码，用于检查我的数据库中是否存在某个 id
function checkifuploaded(citenr) {
$.ajax({
type: "POST",
url: "locationsDB.asmx/checkifexist",
data: '{"citenr": "' + citenr + '"}',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
if (response.d) {
return true;
} else {
return false;
}
//setinfo();
},
failure: function (response) {
alert(response.d);
}
});
}
现在我有另一个使用上述功能的功能
function plotnew(lat, lng) {
$('#latt').val(lat);
$('#longt').val(lng);
$("#Panel2").dialog({
resizable: false,
height: 350,
width: 600,
modal: true,
buttons: {
"Plot Incident and Save to Database": function () {
//$(this).dialog("close");
if (checkifuploaded($('#idcr').val())) {
$.post(
'insertcrimelocation.aspx',
{ lat: $('#latt').val(), long: $('#longt').val(), cirsid: $('#idcr').val() },
function (responseText, textStatus) {
//checkifexist
plot();
$("#Panel2").dialog("close");
$.ambiance({ message: "successfully plotted the incident!",
title: "Success!",
type: "success"
});
})
.error(function () {
$.ambiance({ message: "error on request",
title: "Error!",
type: "error"
});
});
} else {
$.ambiance({ message: "The C.I.R.S id is not yet uploaded",
title: "Error!",
type: "error"
});
}
},
Cancel: function () {
$(this).dialog("close");
}
}
});
}
我下面的 web 服务代码按预期返回它返回 true
<WebMethod()> _
Public Function checkifexist(citenr As String) As Boolean
Dim locs As New crimemsapslocationDataContext
Dim check = locs.OFFENSEs.Where(Function(offense) offense.CITE_NR = citenr).First
If Not check Is Nothing Then
Return True
Else
Return False
End If
End Function
令我惊讶的是，在第二个函数 plotnew() 上，如果返回值为 true，它会以相反的方式执行，而不是通过另一个页面调用函数，我的代码有问题吗？
我现在可以使用下面的代码
function checkifuploaded(citenr) {
$.ajax({
type: "POST",
url: "locationsDB.asmx/checkifexist",
data: '{"citenr": "' + citenr + '"}',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
if (response.d) {
i squeezed my function here to make it work
thanks for all the help and info
} else {
return false;
}
//setinfo();
},
failure: function (response) {
alert(response.d);
}
});
}