Javascript MVC在dropdownlistfor onchange ajax调用中的重新加载问题
我的DropDownListFor看起来像:Javascript MVC在dropdownlistfor onchange ajax调用中的重新加载问题,javascript,jquery,ajax,asp.net-mvc,Javascript,Jquery,Ajax,Asp.net Mvc,我的DropDownListFor看起来像: @Html.DropDownListFor( m => m.CampaignID, new SelectList(Model.Campaigns, "ID", "Name"), "---Geen---", new { id = "campaignDdl", data_url = Url.Action("CampaignChosen",
@Html.DropDownListFor(
m => m.CampaignID,
new SelectList(Model.Campaigns, "ID", "Name"),
"---Geen---",
new {
id = "campaignDdl",
data_url = Url.Action("CampaignChosen", "Nomination")
}
)
$(function () {
$('#campaignDdl').change(function () {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
})
.fail(function (jqxhr) { alert(JSON.stringify(jqxhr)); });
});
});
[AcceptVerbs("POST")]
public ActionResult CampaignChosen(string selectedCampaignID) {
if (!string.IsNullOrEmpty(selectedCampaignID)) {
int campaignID = Convert.ToInt32(selectedCampaignID);
Models.Campaign campaign = Models.Campaign.GetCampaignByID(campaignID);
return PartialView("ShowCampaignOverview", campaign);
} else {
return PartialView("ShowCampaignOverview", null);
}
}
我的onchange javascript看起来像:
@Html.DropDownListFor(
m => m.CampaignID,
new SelectList(Model.Campaigns, "ID", "Name"),
"---Geen---",
new {
id = "campaignDdl",
data_url = Url.Action("CampaignChosen", "Nomination")
}
)
$(function () {
$('#campaignDdl').change(function () {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
})
.fail(function (jqxhr) { alert(JSON.stringify(jqxhr)); });
});
});
[AcceptVerbs("POST")]
public ActionResult CampaignChosen(string selectedCampaignID) {
if (!string.IsNullOrEmpty(selectedCampaignID)) {
int campaignID = Convert.ToInt32(selectedCampaignID);
Models.Campaign campaign = Models.Campaign.GetCampaignByID(campaignID);
return PartialView("ShowCampaignOverview", campaign);
} else {
return PartialView("ShowCampaignOverview", null);
}
}
我选择的操作如下所示:
@Html.DropDownListFor(
m => m.CampaignID,
new SelectList(Model.Campaigns, "ID", "Name"),
"---Geen---",
new {
id = "campaignDdl",
data_url = Url.Action("CampaignChosen", "Nomination")
}
)
$(function () {
$('#campaignDdl').change(function () {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
})
.fail(function (jqxhr) { alert(JSON.stringify(jqxhr)); });
});
});
[AcceptVerbs("POST")]
public ActionResult CampaignChosen(string selectedCampaignID) {
if (!string.IsNullOrEmpty(selectedCampaignID)) {
int campaignID = Convert.ToInt32(selectedCampaignID);
Models.Campaign campaign = Models.Campaign.GetCampaignByID(campaignID);
return PartialView("ShowCampaignOverview", campaign);
} else {
return PartialView("ShowCampaignOverview", null);
}
}
正如你所看到的,我正在传递一个局部视图。javascript确保视图get被放入一个id=“campaign”的div中。这个div是在您前面看到的dropdownlistfor下定义的,如下所示:
<div id="campaign"></div>
$(function () {
$('#campaignDdl').change(function () {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
});
})
.fail(function (jqxhr) {
alert(JSON.stringify(jqxhr));
})
.change();
});
选择一个项目后,一切正常。再高兴不过了。但是,当您在浏览器上按“重新加载”时,所选项目仍然显示在dropdownlistfor中,但我不知道如何再次在该div中加载适当的局部视图。因为我对MVC还是有点陌生
有人能指出MVC通常是如何做到这一点的吗?提前感谢您的回答。您可以模拟jquery.ready函数的onchange函数:
$(document).ready(function() {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
})
});
这应该与ddl更改时执行的操作完全相同,而是采用已选择的值,并将相应的视图放入div中。您可以模拟jquery.ready函数的onchange函数:
$(document).ready(function() {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
})
});
这应该与ddl更改时做的事情完全相同,但取而代之的是使用已选择的值并将相应的视图放入div中。您也可以调用change方法,以避免重复代码,如下所示:
<div id="campaign"></div>
$(function () {
$('#campaignDdl').change(function () {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
});
})
.fail(function (jqxhr) {
alert(JSON.stringify(jqxhr));
})
.change();
});
您也可以只调用change方法,以避免重复代码,如下所示:
<div id="campaign"></div>
$(function () {
$('#campaignDdl').change(function () {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html(data);
});
})
.fail(function (jqxhr) {
alert(JSON.stringify(jqxhr));
})
.change();
});
试试这个
$(document).ready(function() {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html('');
$('#campaign').append(data.Data);
})
})
) 试试这个
$(document).ready(function() {
//alert('Template knop geklikt');
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$.post(url, { selectedCampaignID: selCampID }, function (data) {
$('#campaign').html('');
$('#campaign').append(data.Data);
})
})
) 我建议您使用而不是$.post() 关于这一点,将新的加载代码块放入函数中,并在页面加载时调用onece,在事件被触发时调用onece
$(document).ready(function() {
$('#campaignDdl').change(function () {
loadCampaignById();
.fail(function (jqxhr) { alert(JSON.stringify(jqxhr)); });
});
loadCampaignById();
});
function loadCampaignById()
{
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$('#campaign').load(url + "/" + selCampID));
})
我建议您使用而不是$.post() 关于这一点,将新的加载代码块放入函数中,并在页面加载时调用onece,在事件被触发时调用onece
$(document).ready(function() {
$('#campaignDdl').change(function () {
loadCampaignById();
.fail(function (jqxhr) { alert(JSON.stringify(jqxhr)); });
});
loadCampaignById();
});
function loadCampaignById()
{
var $campaignDdl = $('#campaignDdl');
var selCampID = $campaignDdl.val();
var url = $campaignDdl.data('url');
$('#campaign').load(url + "/" + selCampID));
})
没有完全理解您的问题..当您重新加载页面时,下拉列表中仍然填充着旧值(通过onchange添加的值)?请参阅:cache、outputcache,还是希望在刷新页面时从头开始重新填充下拉列表?请参阅:page.onload,而不是ele.onchange。很明显,问题非常简单,实际上没有问题。很抱歉,这个问题打扰了您。您还没有完全理解您的问题。当您重新加载页面时,下拉列表中仍然填充着旧值(通过onchange添加的值)?请参阅:cache、outputcache,还是希望在刷新页面时从头开始重新填充下拉列表?请参阅:page.onload,而不是ele.onchange。很明显,问题非常简单,实际上没有问题。很抱歉用这个问题打扰你。哦,天哪,当然。我可以简单地再次采取行动。我不太聪明。谢谢我将使用load函数。再次感谢。哦,天哪,当然。我可以简单地再次采取行动。我不太聪明。谢谢我将使用load函数。再次感谢。谢谢,你们当然是对的。只需在重新加载时再次调用该操作。哦,谢谢,你当然是对的。只需在重新加载时再次调用该操作。哦,是的。你是对的。我请客。很抱歉浪费你的时间。是的。你是对的。我请客。对不起,浪费了你的时间。