C#ASP.NET无法对数据库中的搜索结果进行排序
我在C#ASP.NET中实现了一个设备管理应用程序,并且在我的应用程序中实现了搜索和排序功能 我的问题是,我无法对搜索结果进行排序,而不是在单击“名称”(按名称对结果进行排序)后,它将对所有设备进行排序,而不仅仅是搜索结果 在这个控制器中,我显示没有所有者的设备(UserID==null) 这是我的控制器:C#ASP.NET无法对数据库中的搜索结果进行排序,c#,asp.net,asp.net-mvc,sorting,search,C#,Asp.net,Asp.net Mvc,Sorting,Search,我在C#ASP.NET中实现了一个设备管理应用程序,并且在我的应用程序中实现了搜索和排序功能 我的问题是,我无法对搜索结果进行排序,而不是在单击“名称”(按名称对结果进行排序)后,它将对所有设备进行排序,而不仅仅是搜索结果 在这个控制器中,我显示没有所有者的设备(UserID==null) 这是我的控制器: public ActionResult deviceList(String sortBy, String search) { if (Session[
public ActionResult deviceList(String sortBy, String search)
{
if (Session["userID"] != null)
{
ViewBag.SortNameParameter = String.IsNullOrEmpty(sortBy) ? "Name desc" : "";
ViewBag.SortTypeParameter = sortBy == "Type" ? "Type desc" : "Type";
ViewBag.SortManufacturerParameter = sortBy == "Manufacturer" ? "Manufacturer desc" : "Manufacturer";
var devices = db.devices.AsQueryable();
if (devices.Any(x => x.UserID == null))
{
devices = db.devices.Where(x => x.UserID == null);
switch (sortBy)
{
case "Name desc":
devices = devices.Where(x => x.DName.Contains(search)).OrderByDescending(x => x.DName);
break;
...
default:
devices = devices.Where(x => x.DName.Contains(search)).OrderBy(x => x.DName);
break;
}
return View(devices.ToList());
}
丢失的零件按类型、制造商等分类
以下是我的看法:
@using (Html.BeginForm("deviceList", "devices", FormMethod.Get))
{
<label>
<b>Search:</b>
@Html.TextBox("Search")
<input type="submit" value="Search" />
</label>
}
</div>
<table class="table table-striped custab">
<thead>
<tr>
<th align="center">
@Html.ActionLink("Name", "deviceList", new { sortBy = ViewBag.SortNameParameter })
</th>
<th>
@Html.ActionLink("Manufacturer", "deviceList", new { sortBy = ViewBag.SortManufacturerParameter })
</th>
<th>
@Html.ActionLink("Type", "deviceList", new { sortBy = ViewBag.SortTypeParameter })
</th>
<th>
@Html.DisplayNameFor(model => model.DOS)
</th>
<th>
@Html.DisplayNameFor(model => model.DOSVersion)
</th>
<th>
@Html.DisplayNameFor(model => model.DProcessor)
</th>
<th align="center">
@Html.DisplayNameFor(model => model.DRAM)
</th>
<th>
@Html.DisplayNameFor(model => model.user.userName)
</th>
<th>Action</th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.DName)
</td>
<td>
@Html.DisplayFor(modelItem => item.DManufacturer)
</td>
<td>
@Html.DisplayFor(modelItem => item.DType)
</td>
<td>
@Html.DisplayFor(modelItem => item.DOS)
</td>
<td>
@Html.DisplayFor(modelItem => item.DOSVersion)
</td>
<td>
@Html.DisplayFor(modelItem => item.DProcessor)
</td>
<td>
@Html.DisplayFor(modelItem => item.DRAM)
</td>
<td>
@Html.DisplayFor(modelItem => item.user.userName)
</td>
@使用(Html.BeginForm(“deviceList”、“devices”、FormMethod.Get))
{
搜索:
@文本框(“搜索”)
}
@ActionLink(“名称”,“设备列表”,新的{sortBy=ViewBag.SortNameParameter})
@ActionLink(“制造商”、“设备列表”,新的{sortBy=ViewBag.SortManufacturerParameter})
@ActionLink(“类型”,“设备列表”,新的{sortBy=ViewBag.SortTypeParameter})
@DisplayNameFor(model=>model.DOS)
@DisplayNameFor(model=>model.DOSVersion)
@DisplayNameFor(model=>model.DProcessor)
@DisplayNameFor(model=>model.DRAM)
@DisplayNameFor(model=>model.user.userName)
行动
@foreach(模型中的var项目)
{
@DisplayFor(modelItem=>item.DName)
@DisplayFor(modelItem=>item.DManufacturer)
@DisplayFor(modelItem=>item.DType)
@DisplayFor(modelItem=>item.DOS)
@DisplayFor(modelItem=>item.DOSVersion)
@DisplayFor(modelItem=>item.DProcessor)
@DisplayFor(modelItem=>item.DRAM)
@DisplayFor(modelItem=>item.user.userName)
搜索功能非常有效,但是在搜索结果之后,如果我单击名称(排序),URL中的搜索参数将消失,它将对我的整个列表而不是搜索结果进行排序
请帮我找出我的错误。只需将搜索更改为搜索此操作即可
public ActionResult deviceList(String sortBy, String Search)
{
if (Session["userID"] != null)
{
ViewBag.SortNameParameter = String.IsNullOrEmpty(sortBy) ? "Name desc" : "";
ViewBag.SortTypeParameter = sortBy == "Type" ? "Type desc" : "Type";
ViewBag.SortManufacturerParameter = sortBy == "Manufacturer" ? "Manufacturer desc" : "Manufacturer";
var devices = db.devices.AsQueryable();
if (devices.Any(x => x.UserID == null))
{
devices = db.devices.Where(x => x.UserID == null);
switch (sortBy)
{
case "Name desc":
devices = devices.Where(x => x.DName.Contains(Search)).OrderByDescending(x => x.DName);
break;
...
default:
devices = devices.Where(x => x.DName.Contains(Search)).OrderBy(x => x.DName);
break;
}
return View(devices.ToList());
}
您的问题很明显。当您单击排序链接时,还必须发送筛选器参数 因此,应采取以下行动: 将搜索参数保留在
查看包
的设备列表
操作中:
ViewBag.SearchParameter = search;
ViewBag.SortNameParameter = String.IsNullOrEmpty(sortBy) ? "Name desc" : "";
ViewBag.SortTypeParameter = sortBy == "Type" ? "Type desc" : "Type";
ViewBag.SortManufacturerParameter = sortBy == "Manufacturer" ? "Manufacturer desc" : "Manufacturer";
然后在链接中以sortBy相同的方式传递:
@Html.ActionLink("Name", "deviceList", new { search = ViewBag.SearchParameter, sortBy = ViewBag.SortNameParameter })
@Html.ActionLink("Manufacturer", "deviceList", new { search = ViewBag.SearchParameter, sortBy = ViewBag.SortManufacturerParameter })
@Html.ActionLink("Type", "deviceList", new { search = ViewBag.SearchParameter, sortBy = ViewBag.SortTypeParameter })
并管理文本框的搜索参数:
@Html.TextBox("search", ViewBag.SearchParameter)
当您单击这些链接按名称/制造商/类型排序时,它似乎没有提交表单,因此它只是将您重定向到该链接。当您单击搜索按钮时,它会将表单连同搜索数据发送回控制器,但是
@Html.ActionLink(…)
不会提交表单
您需要将搜索文本与此链接一起发送,可能需要将搜索文本绑定到您的模型并更新链接以包含该链接。请尝试以下操作:
@Html.ActionLink("Name", "deviceList", new { sortBy = ViewBag.SortNameParameter, ViewBag.SearchString })
在表单中,您需要更新它以发送搜索字符串:
<label>
<b>Search:</b>
@Html.TextBox("Search", @ViewBag.SearchString)
<input type="submit" value="Search" />
</label>
搜索:
@Html.TextBox(“Search”,@ViewBag.SearchString)