.net core連線MongoDB
前兩天在學習MongoDB相關的知識，做了個小Demo，做的是省份下面有多少所學校，嗯，做的比較粗暴。。。
連線MongoDB首先要通過Nuget新增一個MongoDB的包，下載此包
安裝完畢後開始寫程式碼了，建立一個省份實體，一個學校實體
using MongoDB.Bson.Serialization.Attributes;
using System.Collections.Generic;
namespace MongoCore.Models
{
public class Province
{
[BsonId]
public int ProvinceID { get; set; }
public string ProvinceName { get; set; }
/// <summary>
/// 省份裡有多個學校 這裡用集合儲存
/// </summary>
public IList<School> SchoolName { get; set; }
}
}
namespace MongoCore.Models
{
//用於後面新增學校
public School(string schoolName, string years)
{
SchoolName = schoolName;
Years = years;
}
public class School
{
public string SchoolName { get; set; }
public string Years { get; set; }
}
}
建立上下文類，連線MongoDB
namespace MongoCore.Models
{
public class ProvinceContext
{
//定義資料庫
private readonly IMongoDatabase _database = null;
public ProvinceContext()
{
//連線伺服器名稱 mongo的預設埠27017
var client = new MongoClient("mongodb://.......:27017");
if (client != null)
//連線資料庫
_database = client.GetDatabase("資料庫名");
}
public IMongoCollection<Province> Province
{
get
{
return _database.GetCollection<Province>("Province");
}
}
}
}
建立控制器
private readonly ProvinceContext _context = new ProvinceContext();
public async Task<IActionResult> Index() {
var list = await _context.Province.Find(_ => true).ToListAsync(); return View(list); }
檢視
@model List<MongoCore.Models.Province>
@{
ViewData["Title"] = "Index";
}
<h2>Index</h2>
<h2>Index</h2>
<a asp-action="Create"><input type="button" value="新 建" class="btn btn-default" /></a>
<table class="table">
<tr>
<th>省份ID</th>
<th>省份名稱</th>
<th>操作</th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.ProvinceID)
</td>
<td>
@Html.DisplayFor(modelItem => item.ProvinceName)
</td>
<td>
<a asp-action="Insert" asp-route-ProvinceID="@item.ProvinceID">新 增</a>
<a asp-action="Detail" asp-route-ProvinceID="@item.ProvinceID">詳 情</a>
<a asp-action="Delete" asp-route-ProvinceID="@item.ProvinceID">刪 除</a>
</td>
</tr>
}
</table>
執行的時候修改配置在Startup.cs裡
執行效果是這樣的，現在還沒有資料，
點選新建按鈕新增省份,這裡我添加了湖北省
新增省份程式碼如下：後端
public IActionResult Create()
{
return View();
}
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Create(Province item)
{
try
{
//初始化學校型別資料
item.SchoolName = new List<School>();
await _context.Province.InsertOneAsync(item);
return RedirectToAction(nameof(Index));
}
catch
{
return View();
}
}
檢視：
@model MongoCore.Models.Province
@{
ViewData["Title"] = "Create";
}
<h2>Create</h2>
<div class="row">
<div class="col-md-4">
<form asp-action="Create">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label class="control-label">省份ID</label>
<input asp-for="ProvinceID" class="form-control" />
</div>
<div class="form-group">
<label class="control-label">省份名稱</label>
<input asp-for="ProvinceName" class="form-control" />
</div>
<div class="form-group">
<input type="submit" value="保 存" class="btn btn-default" />
</div>
</form>
</div>
</div>
接下來就是新增省份下面的學校了
public async Task<IActionResult> Insert(int ProvinceID)
{
var num = await _context.Province.Find(p => p.ProvinceID == ProvinceID).SingleOrDefaultAsync();
return View(num);
}
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Insert(int ProvinceID, string Years, string SchoolName)
{
var item = await _context.Province.Find(p => p.ProvinceID == ProvinceID).SingleOrDefaultAsync();
School sl = new School(SchoolName,Years);
//新增學校
item.SchoolName.Add(sl);
//更新
ReplaceOneResult actionResult
= await _context.Province
.ReplaceOneAsync(n => n.ProvinceID.Equals(ProvinceID)
, item
, new UpdateOptions { IsUpsert = true });
return RedirectToAction(nameof(Index));
}
檢視：
@model MongoCore.Models.Province
@{
ViewData["Title"] = "Insert";
}
<h2>新增</h2>
<div class="row">
<div class="col-md-4">
<form asp-action="Insert">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<input type="hidden" asp-for="ProvinceID" />
<div class="form-group">
<label class="control-label">學校名稱</label>
<input name="SchoolName" class="form-control" />
</div>
<div class="form-group">
<label class="control-label">成立年份</label>
<input name="Years" class="form-control" />
</div>
<div class="form-group">
<input type="submit" value="保 存" class="btn btn-default" />
</div>
</form>
</div>
</div>
然後新增學校，我添加了兩所學校，在MongoDB裡可以看到資料
原文地址：http://www.cnblogs.com/lcq529/p/8398004.html
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