小编use*_*234的帖子

保存到DB,C#时,十进制精度丢失.我正在使用实体框架

我的模特

public class Hotel
{
    public int Id { get; set; }
    [Required]
    [Display(Name="Hotel Name")]
    public string HotelName {get;set;}
    [Required]
    public string Address { get; set; }
    [Required]
    [DisplayFormat(DataFormatString = "{0:N6}", ApplyFormatInEditMode = true)]
    [RegularExpression(@"\d{1,10}(\.\d{1,6})", ErrorMessage = "Invalid Latitude")]
    public Decimal Latitude { get; set; }
    [Required]
    [DisplayFormat(DataFormatString = "{0:N6}", ApplyFormatInEditMode = true)]
    [RegularExpression(@"\d{1,10}(\.\d{1,6})", ErrorMessage = "Invalid Longitude")]
    public Decimal Longitude { get; set; }
    [Required]
    [RegularExpression(@"\d{10,20}", ErrorMessage = "Invalid Number")]    
    public string Telephone { get; set; }
    [Required]
    [EmailAddress] …
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c# linq asp.net-mvc entity-framework

10
推荐指数
2
解决办法
4408
查看次数

#pragma omp 并行 num_threads 不起作用

    #include<omp.h>
    #include<stdio.h>
    #include<stdlib.h>

    void main(int argc, int *argv[]){


   #pragma omp parallel num_threads(3)
   {

    int tid = omp_get_thread_num();
    printf("Hello world from thread = %d \n",tid);
    if(tid == 0){
        int nthreads = omp_get_num_threads();
        printf("Number of threads = %d\n",nthreads);
    }
   }

  }
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我正在学习 OpenMP,但我不明白为什么当我指定了线程数 3 时它只执行一个线程?程序输出:

   Hello world from thread = 0
   Number of threads = 1
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c c++ parallel-processing openmp

7
推荐指数
1
解决办法
1万
查看次数

构建项目后,Angular 2 路线不起作用

这些是我的路线:

import { Routes } from '@angular/router';
import {WelcomeComponent} from "./welcome/welcome.component";
import { LoginComponent } from './login/login.component';

export const routes: Routes = [
  {path: '', component: WelcomeComponent},
  {path: 'login', component: LoginComponent},
  {path: '**', component: WelcomeComponent}
];
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我使用ng buid.

当我输入未定义的路径时,我希望应用程序'/'在开发过程中重定向到路径,但我收到 404 错误。

即使我手动输入 /login URL 也会出现同样的错误。

我错过了什么?

angular2-routing angular

5
推荐指数
2
解决办法
5763
查看次数

PHPOffice/PhpSpreadsheet 获取单元格列索引为整数

如何将单元格列索引设为整数?我已经搜索了文档,但没有找到任何东西。

php excel phpoffice phpspreadsheet

5
推荐指数
1
解决办法
9303
查看次数

Recharts - 条形图动态标签位置

如何获得如图所示的动态条形标签位置?

在此输入图像描述

这是我到目前为止的代码

const data = [
        { currency: 'CHF', amount: 3, amountLabel: 3023.00 },
        { currency: 'GBP', amount: 6, amountLabel: 6275.00 },
        { currency: 'USD', amount: 10, amountLabel: 9999.00 },
        { currency: 'EUR', amount: 14, amountLabel: 14819.00 },
        { currency: 'LEK', amount: 24, amountLabel: 24023000.00 },
    ];    
<BarChart
    width={430}
    height={170}
    data={data}
    layout="vertical">
    <XAxis type="number" orientation="top" stroke="#285A64" />
    <YAxis type="category" dataKey="currency" axisLine={false} dx={-5} tickLine={false} 
           style={{ fill: "#285A64" }} />
     <Bar background dataKey="amount" fill="#285A64" barSize={{ height: 26 }}>
        <LabelList dataKey="amountLabel" position="insideRight" style={{ …
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reactjs recharts

5
推荐指数
1
解决办法
1万
查看次数

ArrayList方法添加错误

错误是客户具有不同的ID,但在ArrayList类的readCustomer对象中,唯一保存的ID是最后一个客户的ID.

//reads customer data from register.txt file
//has 2 string as arguments
//returns a ArrayList object with all the customer with the same name

public ArrayList<Customer> readCustomer(String name,String surname){

    Customer temp = new Customer();

    //will hold all the customers with the same name and surname
    ArrayList<Customer> readCustomer = new ArrayList<Customer>();        

    try{
        FileInputStream fstream = new FileInputStream("register.txt");
        BufferedReader fbr = new BufferedReader(new InputStreamReader(fstream));
        String strLine;
        while ((strLine = fbr.readLine()) != null)   {

            String line[];
            line = strLine.split(" ");                
            if(name.equals(line[1]) && surname.equals(line[2])){ …
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java

2
推荐指数
1
解决办法
103
查看次数