我正在处理 mvc3 中的表单,并在 javascript 和 ajax 中使用表单验证。在我的表单中,我在数据库中添加代码和描述,在提交表单之前想要检查数据库中是否已经存在代码。我通过 ajax 函数调用获取 javascript 中的代码,并以 json 形式返回数据。当我得到数据时,我会向用户显示错误消息,提醒用户该代码已经存在。但我的警报没有显示。我该怎么办。下面是我的javascript保存按钮点击功能
$('#sve').click(function () {
//e.preventDefault();
var iscodeexis = CodeExistChk();
if (iscodeexis) {//
//***********************CODE TO SAVE DATA IN DATABASE***********************************
var person = { AcCode: $('#AcCode').val(), Descrip: $('#Descrip').val(), AddOn: dd };
$.ajax({
url: '/Home/Save?action=Sve',
type: "POST",
data: JSON.stringify(person),
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (result) {
// $('#message').html('Record saved successfully' + result).fadeIn();
alert("Record saved successfully");
},
error: function () {
// $('#message').html('Error Occurred').fadeIn();
alert("Record not saved successfully");
}
});
}//end of is valid function chk
else
return false;//if isvalid function return false then save button also return false
}); //end button clcik function
function CodeExistChk() {
subA = $('#AcCode').val().trim();
// ===========================check whether code exist already or not
if (subA.length === 10) {
str1 = "select AcCode from Account where AcCode='";
str2 = str1 + subA + "'";
GetCodeData(str2); //check whether code exist or not
strRes = strRes.substring(1, strRes.length - 1);
if (strRes.length > 0 && strRes != "") //if code exist then return false and not allow to enter code
{
alert('Code already exist cannot insert record');
return false;
}
}
//===============================
}
下面是 getcodedata 函数,它在上面的代码中用于从数据库中获取代码
//===============FUNCTION TO GET CODE FROM DATABASE TO USE IN JS FILE==========
function GetCodeData(Str) {
var p = {
StrSql: Str
};
$.ajax({
url: '/Home/GetGenVal',
type: 'POST',
// contentType: 'application/x-www-form-urlencoded',
dataType: "JSON",
contentType: "application/json; charset=utf-8",
processData: false,
crossDomain: false,
traditional: true,
data: JSON.stringify(p),
cache: false,
// success: callback
success: function (data) {
//$("#Descrip").val(data);
// ResSubCode = data;
strRes = null;
strRes = data;
return strRes;
}
});
}
等待早日解决。