我正在用户管理的添加/编辑操作中检查重复的用户名，并处理以下代码：
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult InsertUser(UserViewModel viewModel)
{
var user = new User
{
UserID = viewModel.UserID,
UserName = viewModel.UserName,
//Password = "123456",
Password = viewModel.Password,
FullName = viewModel.FullName,
Email = viewModel.Email,
CreationDate = DateTime.Now,
IsActive = viewModel.IsActive
};
//Also check here if user already exist, usename shud be unique.
bool isAlreadyExist = new UserManagement().CheckUserName(user.UserName);
if(isAlreadyExist)
{
return Json(false);
}
try
{
new UserManagement().Save(user);
}
catch (Exception)
{
return Json(false);
}
return Json(true);
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult UpdateUser(UserViewModel viewModel)
{
User user = new UserManagement().GetUserBy(viewModel.UserID);
if (!viewModel.UserName.TrimEnd().Equals(user.UserName.TrimEnd()))
{
bool isAlreadyExist = new UserManagement().CheckUserName(viewModel.UserName);
if (isAlreadyExist)
{
return Json(false);
}
}
user.UserName = viewModel.UserName;
user.Password = viewModel.Password;
user.FullName = viewModel.FullName;
user.Email = viewModel.Email;
user.IsActive = viewModel.IsActive;
try
{
new UserManagement().Save(user);
}
catch
{
return Json(false);
}
return Json(true);
}
.cshtml中的脚本代码如下：
<script type="text/javascript">
var arrayIds = [];
var roleDropDown = "";
$(document).ready(function () {
$(".ui-dropdownchecklist > div > div > .active").live("change", function () {
var parentId = $(this).parent().parent().parent().attr("Id");
parentId = parentId.substring(0, parentId.length - 4);
$("#" + parentId + " > span > span").text("Assigning...").css("color", "#666666");
//Set Variable to identify Assign or Deassign Role to User
var checked = false;
if ($(this).attr("checked") == "checked") {
checked = true;
}
//Set RoleId
var role = $(this).val();
//Set UserId
var user = $(this).attr('id');
//Start Ajax Call
$.ajax({
url: '@Url.Action("ManageUserRoles", "Role")',
type: "GET",
cache: false,
data: { userid: user, roleid: role, chked: checked },
//async: false,
success: function () {
},
complete: function () {
$("#" + parentId + " > span > span").text("Assign Roles").css("color", "#222222");
}
});
//End Ajax Call
});
roleDropDown = "<select id='_RoleID' multiple='true' style='Display: none;'>";
$.ajax({
url: '@Url.Action("GetAllReoles", "Role")',
type: "GET",
cache: true,
async: false,
success: function (countiesJson) {
$.each(countiesJson, function (index, optionData) {
roleDropDown += "<option value='" + optionData.RoleID + "'>" + optionData.RoleName + "</option>";
});
}
});
roleDropDown += "</select>";
var userGrid = $('#jqgUsers');
var pages = [];
var MAX_PAGERS = 2;
$('#jqgUsers').jqGrid({
//url from wich data should be requested
url: '@Url.Action("FetchUsers")',
//type of data
datatype: 'json',
cache: false,
//url access method type
mtype: 'POST',
postData: {
UserName: function () { return $('#UserName1').val(); },
FullName: function () { return $('#FullName1').val(); },
Email: function () { return $('#Email1').val(); },
IsActive: function () { return $('#IsActive1 option:selected').val(); },
FromDate: function () { return $('#FromDate').val(); },
ToDate: function () { return $('#ToDate').val(); }
},
colNames: ['User ID', 'User Name', 'Password', 'Full Name', 'Email', 'Active', 'Roles', ''],
//columns model
colModel: [
{ name: 'UserID', index: 'UserID', hidden: true, align: 'left', editable: false },
{ name: 'UserName', index: 'UserName', width: 252, align: 'left', editable: true, edittype: 'text', editoptions: { maxlength: 50 }, editrules: { required: true} },
{ name: 'Password', index: 'Password', hidden: true, width: 175, align: 'left', editable: true, edittype: 'password', editoptions: { maxlength: 20 }, editrules: { required: true, edithidden: true} },
{ name: 'FullName', index: 'FullName', width: 245, align: 'left', editable: true, edittype: 'text', editoptions: { maxlength: 100 }, editrules: { required: true} },
{ name: 'Email', index: 'Email', width: 247, align: 'left', formatter: emailFormatter, sortable: true, editable: true, edittype: 'custom', editoptions: { custom_element: mymailelem, custom_value: mymailvalue }, editrules: { required: true, email: true} },
{ name: 'IsActive', index: 'IsActive', width: 85, formatter: imgformatter, sortable: true, align: 'center',
editable: true, edittype: 'custom', editoptions: { custom_element: myelem, custom_value: myvalue }
},
{ name: 'role', index: 'role', width: 120, formatter: RoleCobFormatter, sortable: true, align: 'left' },
{ name: 'act', index: 'act', width: 55, align: 'center', sortable: false, formatter: 'actions',
formatoptions: {
keys: true,
editformbutton: true,
delbutton: true,
editOptions: {
url: '@Url.Action("UpdateUser")',
closeAfterEdit: true
},
delOptions: {
url: '@Url.Action("DeleteUser")'
}
}
}
],
pager: $('#jqgpUsers'),
rowNum: 10,
pginput: false,
rowList: [10, 20, 50, 100],
sortname: 'UserID',
sortorder: 'asc',
viewrecords: true,
height: 'auto',
loadComplete: function () {
if (pages[$('#jqgUsers').getGridParam('page')] != null) {
var selRows = pages[$('#jqgUsers').getGridParam('page')];
var i;
var limit = selRows.length;
for (i = 0; i < limit; i++) {
$('#jqgUsers').setSelection(selRows[i], true);
}
}
//-------Start Paging Style
var i, myPageRefresh = function (e) {
var newPage = $(e.target).text();
userGrid.trigger("reloadGrid", [{ page: newPage}]);
e.preventDefault();
};
//variables
var currentPage = this.p.page;
var startPage;
var totalPages = this.p.lastpage;
if (this.p.records == 0) {
totalPages = 0;
}
if (this.p.page - MAX_PAGERS <= 0) {
startPage = 1;
}
else {
startPage = this.p.page - MAX_PAGERS;
}
var lastPage;
if (this.p.page + MAX_PAGERS >= totalPages) {
lastPage = totalPages;
}
else {
lastPage = this.p.page + MAX_PAGERS;
}
$(userGrid[0].p.pager + '_center td.myPager').remove();
//---- Variables End
if (totalPages > 1) {
var pagerPrevTD = $('<td>', { "class": "myPager" }), prevPagesIncluded = 0,
pagerNextTD = $('<td>', { "class": "myPager" }), nextPagesIncluded = 0,
totalStyle = userGrid[0].p.pginput === false,
startIndex = totalStyle ? this.p.page - MAX_PAGERS * 2 : this.p.page - MAX_PAGERS;
for (i = startPage; i <= lastPage; i++) {
if (i <= 0) { continue; }
var link = $('<a>', { href: '#', click: myPageRefresh, "class": "Paging" });
if (i == this.p.page) { link.attr("class", "selected"); }
link.text(String(i));
if (i < this.p.page || totalStyle) {
pagerPrevTD.append(link);
prevPagesIncluded++;
} else {
if (nextPagesIncluded > 0 || (totalStyle && prevPagesIncluded > 0)) { pagerNextTD.append('<span>, </span>'); }
pagerNextTD.append(link);
nextPagesIncluded++;
}
}
if (prevPagesIncluded > 0) {
$(userGrid[0].p.pager + '_center td[id^="prev"]').after(pagerPrevTD);
}
if (nextPagesIncluded > 0) {
$(userGrid[0].p.pager + '_center td[id^="next"]').before(pagerNextTD);
}
}
else {
//$('#first_jqgpFlagger').unbind();
$('#first_jqgpUsers').attr('class', 'ui-corner-all ui-state-disabled');
//$('#prev_jqgpFlagger').unbind();
$('#prev_jqgpUsers').attr('class', 'ui-corner-all ui-state-disabled');
//$('#next_jqgpFlagger').unbind();
$('#next_jqgpUsers').attr('class', 'ui-corner-all ui-state-disabled');
//$('#last_jqgpFlagger').unbind();
$('#last_jqgpUsers').attr('class', 'ui-corner-all ui-state-disabled');
}
//-------End Paging Style
},
gridComplete: function () {
$.each(arrayIds, function (index, optionData) {
$.ajax({
url: '@Url.Action("GetRolesbyUserId", "Role")' + '/' + optionData.substring(4),
type: "GET",
cache: false,
async: false,
success: function (countiesJson) {
$.each(countiesJson, function (index, optionItem) {
$("#" + optionData + " option[value='" + optionItem.RoleID.toString() + "']").attr("selected", "selected");
});
}
});
if ($("#ddcl-" + optionData).length > 0) {
$("#ddcl-" + optionData).remove();
$("#ddcl-" + optionData + "-ddw").remove();
}
$("#" + optionData).dropdownchecklist({ emptyText: "Assign Roles" });
}); //End Each Loop
}
});
$('#jqgUsers').jqGrid('navGrid', '#jqgpUsers',
{ add: true, del: false, edit: false, search: false },
{ width: '250', closeAfterEdit: true, url: '@Url.Action("UpdateUser")' },
{ width: '250', closeAfterAdd: true, url: '@Url.Action("InsertUser")' },
{ width: '250', url: '@Url.Action("DeleteUser")' });
$('#CustomPanel').appendTo('.ui-jqgrid-hbox');
$(".ui-jqgrid-sortable").attr("style", "height: 32px");
$('#UserName1').blur(function () {
$('#jqgUsers').trigger("reloadGrid");
});
$('#FullName1').blur(function () {
$('#jqgUsers').trigger("reloadGrid");
});
$('#Email1').blur(function () {
$('#jqgUsers').trigger("reloadGrid");
});
$('#IsActive1').change(function () {
$('#jqgUsers').trigger("reloadGrid");
});
$('#btnClear').click(function () {
$('#UserName1').val('');
$('#FullName1').val('');
$('#Email1').val('');
$('#IsActive1 option:eq(0)').attr('selected', 'selected');
$('#jqgUsers').trigger("reloadGrid");
});
});
function emailFormatter(cellvalue) {
email = "<a href='mailto:" + cellvalue + "'>" + cellvalue + "</a>";
return email;
}
function mymailelem(value, options) {
var e1 = document.createElement("input");
e1.type = "text";
if (value != "") {
value = value.split('>')[1].split('<')[0];
}
e1.value = value;
z = document.createAttribute('class');
z.value = 'FormElement ui-widget-content ui-corner-all';
e1.setAttributeNode(z);
return e1;
}
function mymailvalue(elem, operation, value) {
if (value != undefined) {
value = value.split('>')[1].split('<')[0];
}
else {
value = '';
}
if (operation === 'get') {
return $(elem)[0].value;
} else if (operation === 'set') {
$(elem).val(value);
}
}
function imgformatter(cellvalue, options, rowObject) {
if (cellvalue == 'True') {
ActiveImage = "<img border='0' src='../../Content/images/tick.png' alt='' width='16px' height='16px' style='padding-top: 7px;' />";
}
else {
ActiveImage = "<img border='0' src='../../Content/images/cross.png' alt='' width='16px' height='16px' style='padding-top: 7px;' />";
}
return ActiveImage;
}
function RoleCobFormatter(cellvalue, options, rowObject) {
var id = "sel-" + options.rowId.toString();
arrayIds.push(id);
var retVal = roleDropDown.replace('_RoleID', id);
return retVal;
}
function myelem(value, options) {
var el = document.createElement("input");
el.type = "checkbox";
if (value.indexOf('tick') != -1) {
value = 'checked';
el.checked = 'checked';
}
else {
value = '';
el.checked = '';
}
return el;
}
function myvalue(elem, operation, value) {
if (value != undefined && value.indexOf('tick') != -1) {
value = 'checked';
}
else {
value = '';
}
if (operation === 'get') {
// return $(elem).find("input").val();
return $(elem).is(':checked');
} else if (operation === 'set') {
// $('input', elem).val(value);
// $('input', elem).attr('checked', value);
$(elem)[0].checked = value;
}
}
</script>
如何在添加/编辑对话中显示错误消息，请建议。
答案 0 :(得分：2)
正确的方法是在出现错误时使用一些错误的HTML代码。而不是捕获服务器笼中的所有异常并返回return Json(false)，您可以抛出异常，其中包含错误消息。您可以使用[HandleJsonException]（例如the answer）将任何例外编码为System.Net.HttpStatusCode.InternalServerError作为HttpContext.Response.StatusCode的简单JSON响应。您可以将详细的错误信息发布到jqGrid。
要解码错误信息，您可以使用errorTextFormat方法，方法与the same answer中的decodeErrorMessage函数相同。
如果按照您的方式操作，则无需使用任何CheckUserName方法。而不是你可以使用像.Save(user)这样的方法。如果需要，将自动抛出异常。如果您想显示更详细的错误信息，例如SqlException，请解析信息并在文本中生成另一个例外，其中只包含来自Server，Procedure的信息， LineNumber，Message等属性SqlException。