我正在传递一个字符串回我的控制器,然后试图做一些实体框架上的原始sql
本文关键字:然后 实体 原始 框架 sql 我的 字符串 一个 控制器 | 更新日期: 2023-09-27 18:17:31
我正在使用linq,但我遇到了一些我需要快速编写的东西,所以我试图让原始sql工作。这是我在mvc中的第一个项目所以我是一个新手但这里是我的控制器代码
public ActionResult Index(string Vendors)
{
if (Vendors != "")
{
string query = "SELECT V.VENDOR_NAME, SUM(POL.ORDER_QTY * POL.UNIT_PRICE) AS AMOUNT_SPENT, MONTH(PO.ORDER_DATE) AS MO, YEAR(PO.ORDER_DATE) AS YR, M.ITEM_TYPE AS ITEM_TYPE "
+ "FROM PO_LINE POL"
+ "JOIN PURCH_ORD PO ON PO.PO_NUM = POL.PO_NUM"
+ "JOIN VENDOR V ON V.VENDOR_ID = PO.VENDOR_ID"
+ "JOIN MATERIAL M ON M.ITEM_ID = POL.ITEM_ID"
+ "WHERE V.VENDOR_NAME =" + Vendors
+ "GROUP BY V.VENDOR_NAME, M.ITEM_TYPE, YEAR(PO.ORDER_DATE), MONTH(PO.ORDER_DATE)"
+ "ORDER BY V.VENDOR_NAME";
var data = db.Database.SqlQuery<Reports>(query);
ViewBag.Vendors = new SelectList(db.Vendors, "VENDOR_NAME", "VENDOR_NAME");
return View(query.ToList());
}
这是我的模态代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace GreenfieldGroup2.Models.Reports
{
public class Reports
{
public string VENDOR_NAME { get; set; }
public decimal AMOUNT_SPENT { get; set; }
public string ITEM_TYPE { get; set; }
public DateTime ORDER_DATE { get; set; }
public string ITEM_NAME { get; set; }
public int STOCK_QTY { get; set; }
public string WARD_NAME { get; set; }
public string WARD_LOCATION { get; set; }
public int ITEM_ID { get; set; }
public DateTime DEL_DATE { get; set; }
}
}
传入字典的模型项类型为'System.Collections.Generic.List 1[System.Char]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable
1[GreenfieldGroup2.Models.Reports.Reports]'。
是我的错误,我不确定这是什么意思。下面是我的视图代码
@model IEnumerable<GreenfieldGroup2.Models.Reports.Reports>
@{
ViewBag.Title = "Index";
}
<br />
<head>
<style>
body {
padding-top: 100px
}
</style>
</head>
<body>
@using (Html.BeginForm("Index", "PurchasingReport", FormMethod.Get))
{
<table>
<tr>
<td align="left"><text>Select a Vendor:</text>
</td>
<td align="left">@Html.DropDownList("Vendors", "All Vendords")</td>
</tr>
<tr>
<td align="Left">
<input type="submit" value="submit" onsubmit="return Verify()"/>
</td>
</tr>
</table>
}
<table border="1">
<tr>
<th>
@Html.DisplayNameFor(model => model.VENDOR_NAME)
</th>
<th>
@Html.DisplayNameFor(model => model.AMOUNT_SPENT)
</th>
<th>
@Html.DisplayNameFor(model => model.ITEM_TYPE)
</th>
<th>
@Html.DisplayNameFor(model => model.ORDER_DATE)
</th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.VENDOR_NAME)
</td>
<td>
@Html.DisplayFor(modelItem => item.AMOUNT_SPENT)
</td>
<td>
@Html.DisplayFor(modelItem => item.ITEM_TYPE)
</td>
<td>
@Html.DisplayFor(modelItem => item.ORDER_DATE)
</td>
</tr>
}
</table>
</body>
任何帮助将不胜感激这是一个学校项目
你应该改变你的返回语句
return View(query.ToList());
到下面:
return View(data);
我从你发布的代码中理解,下面
var data = db.Database.SqlQuery<Reports>(query);
将对Reports
对象序列的引用赋值给data
。换句话说,data
的类型是IEnumerable<GreenfieldGroup2.Models.Reports.Reports>
,我可以从你的代码中推断。
需要传递给View而不是sql语句,sql语句只是一个字符串
如果你看看你的视图,它期望"@model IEnumerable"和你传递给视图的参数是查询,你正在数据库上执行,而不是传递查询传递列表,这将完美地工作,不会给你上面的错误。
谢谢。
这是我的最终解决方案,所以如果其他人遇到这个问题,它可以完美地工作,没有sql注入
if (Vendors == null) { Vendors = ""; }
if(Vendors == "") { Vendors = DBNull.Value.ToString(); }
var @Vendor = new SqlParameter("@Vendor", Vendors);
string query = "SELECT V.VENDOR_NAME, SUM(POL.ORDER_QTY * POL.UNIT_PRICE) AS AMOUNT_SPENT, MONTH(PO.ORDER_DATE) AS MO, YEAR(PO.ORDER_DATE) AS YR, M.ITEM_TYPE AS ITEM_TYPE "
+ "FROM PO_LINE POL "
+ "JOIN PURCH_ORD PO ON PO.PO_NUM = POL.PO_NUM "
+ "JOIN VENDOR V ON V.VENDOR_ID = PO.VENDOR_ID "
+ "JOIN MATERIAL M ON M.ITEM_ID = POL.ITEM_ID ";
if (Vendors != "")
{
query += "WHERE V.VENDOR_NAME = @Vendor ";
}
query += "GROUP BY V.VENDOR_NAME, M.ITEM_TYPE, YEAR(PO.ORDER_DATE), MONTH(PO.ORDER_DATE) "
+ "ORDER BY V.VENDOR_NAME";
if (Vendors != "")
{
var data = db.Database.SqlQuery<Reports>(query, @Vendor);
return View(data.ToList());
}
else
{
var data = db.Database.SqlQuery<Reports>(query);
return View(data.ToList());
}