在我的索引视图中,我需要允许用户输入搜索条件。此标准以FormCollection
对象的形式发送回索引控制器。然后我提取搜索条件,从数据库中提取请求的信息,并将用户发回到索引视图。但是,一旦用户返回索引视图和请求的信息,来自FormCollection
对象的数据现在变为空白。从控制器回发后保留ASP MVC FormCollection值
我希望能够在我使用的三个文本框中保留用户的搜索条件,但我不确定如何使用FormCollection
。有谁知道如何做到这一点或我应该使用另一个?
查看
@using(Html.BeginForm())
{
<div id="searchBox" class="boxMe">
<div id="zipBox" style="float: left; padding-left: 20px; padding-right: 10px; padding-top: 20px; padding-bottom: 20px; vertical-align: top;">
@Html.Raw("Zip Code")
@Html.TextArea("ZipSearch", new { style = "width: 300px;", placeholder = "Enter up to 35 comma separated zip codes" })
</div>
<div id="dateBox" style="float: left; padding-right: 10px; padding-top: 20px;">
@Html.Raw("Effective on this date")
@Html.TextBox("DateSearch", null, new { style="width: 80px;"})
</div>
<div id="stateBox" style="float: left; padding-right: 20px; padding-top: 20px;">
@Html.Raw("State")
@Html.TextBox("StateSearch", null, new { style = "width: 25px;" })
<button type="submit">Search</button>
</div>
</div>
<div style="clear: both;"></div>
}
控制器
public ViewResult Index(FormCollection searchDetails = null)
{
string zip = searchDetails["ZipSearch"];
string date = searchDetails["DateSearch"];
string state = searchDetails["StateSearch"];
if (String.IsNullOrWhiteSpace(zip) && String.IsNullOrWhiteSpace(date) && String.IsNullOrWhiteSpace(state))
{
return View();
}
string[] zipArray;
DateTime effectiveDate;
//Convert date string to DateTime type
if (String.IsNullOrWhiteSpace(date))
{
effectiveDate = DateTime.MinValue;
}
else
{
effectiveDate = Convert.ToDateTime(date);
}
//Conduct search based on Zip Codes
if (!String.IsNullOrWhiteSpace(zip))
{
//Create array and remove white spaces
zipArray = zip.Split(',').Distinct().ToArray();
for (int i = 0; i < zipArray.Length; i++)
{
zipArray[i] = zipArray[i].Trim();
}
//Add zip codes to list object then send back to view
List<ZipCodeTerritory> zips = new List<ZipCodeTerritory>();
if (String.IsNullOrWhiteSpace(state))
{
foreach (var items in zipArray)
{
var item = from z in db.ZipCodeTerritory
where z.ZipCode.Equals(items) &&
z.EffectiveDate >= effectiveDate
select z;
zips.AddRange(item);
}
}
else
{
foreach (var items in zipArray)
{
var item = from z in db.ZipCodeTerritory
where z.ZipCode.Equals(items) &&
z.EffectiveDate >= effectiveDate
select z;
zips.AddRange(item);
}
}
return View(zips);
}
//Zip code was not specified so search by state
if (!String.IsNullOrWhiteSpace(state))
{
var items = from z in db.ZipCodeTerritory
where z.StateCode.Equals(state) &&
z.EffectiveDate >= effectiveDate
select z;
return View(items);
}
//Neither zip code or state specified, simply search by date
var dateOnly = from z in db.ZipCodeTerritory
where z.EffectiveDate >= effectiveDate
select z;
return View(dateOnly);
}
编辑
按照下面我说明已经建立了我的视图模型像这样:
public class ZipCodeIndex
{
public List<ZipCodeTerritory> zipCodeTerritory { get; set; }
public string searchZip { get; set; }
public string searchDate { get; set; }
public string searchState { get; set; }
}
但是在我的视图中,我无法访问这些属性中的任何一个。该视图的标题是这样写的:
@model IEnumerable<Monet.ViewModel.ZipCodeIndex>
但是所有的TextBoxFor
和TextAreaFor
助手说,没有指定属性的存在。
@using(Html.BeginForm("Index", "ZipCodeTerritory", FormMethod.Post))
{
<div id="searchBox" class="boxMe">
<div id="zipBox" style="float: left; padding-left: 20px; padding-right: 10px; padding-top: 20px; padding-bottom: 20px; vertical-align: top;">
@Html.Raw("Zip Code")
@Html.TextAreaFor(model => model.searchZip, new { style = "width: 300px;", placeholder = "Enter up to 35 comma separated zip codes" })
</div>
<div id="dateBox" style="float: left; padding-right: 10px; padding-top: 20px;">
@Html.Raw("Effective on this date")
@Html.TextBoxFor(model => model.searchDate, null, new { style="width: 80px;"})
</div>
<div id="stateBox" style="float: left; padding-right: 20px; padding-top: 20px;">
@Html.Raw("State")
@Html.TextBoxFor(model => model.searchState, null, new { style = "width: 25px;" })
<button type="submit">Search</button>
</div>
</div>
<div style="clear: both;"></div>
}
最后编辑
错过了该页面在寻找一个IEnuerable
Model对象。将标题更改为此并解决了问题。
@model Monet.ViewModel.ZipCodeIndex
我会建议寻找到模型和的ViewModels而不是返回的形式。如果你想要看的东西,我可以给你一些例子。 –
有没有不使用模型和DefaultModelBinder的好理由? – Yoeri
你忽略了MVC中的** M ** – Liam