小编Pen*_*uen的帖子

我需要你的帮助才能使用这个方法:

for (int i =0; i<dt.count; i++)
{
    process...
    sleep(3000);
}

int sleeptime=0;
private void timer2_Tick(object sender, EventArgs e)
{
    for (int i = 0; i &#60; mylist.Items.Count;)
    {
        listBox1.Items.Add(mylist.Items[i].Name.ToString() + "starting...");
        sleeptime = int.Parse(mylist.Items[i++].TimeSpan.ToString()) - timer2.Interval;
        System.Threading.Thread.Sleep(sleeptime);
    }
    timer1.Start();
    timer2.Stop();
}

但我没有看到我的数据流如瀑布.

我正在努力学习或生成任何代码来学习字符串day("26.02.2009")--->给我"星期三"

我需要在C#中使用静态日期函数.

例如:

datetime Str_day= Returnstringdate("09.02.2009");  ---->Str_day="Monday";

Returnstringdate("09.02.2009")

{
     it must return Monday!!!
}

要么

Returnstringdate("09.02.2009 12:30:32")

{
     it must return Monday!!!
}

我想要格式化值int或string格式化datetime格式.SQL中有如下任何函数吗？:

    Function:                        Result            

    TimeAdd( nextrundate,"sec",45)   00:00:45
    TimeAdd( nextrundate,"min",45)   00:45:00
    TimeAdd( nextrundate,"hour",4)   04:00:00

But:

    TimeAdd( nextrundate,"min",70)   01:10:00
    TimeAdd( nextrundate,"min",190)  03:10:00

是否有一种方法可以在C#中执行此操作？

我得到数据(沃尔沃汽车的价格)我的xml或sql数据库,我有"xyz.aspx"页面.如何在Web浏览器中打开pdf.但我想学习如何打开pdf(sql datatable中的数据)xyz.aspx或another.aspx中的数据...

样本:Volvos'prices pdf

我怎样才能按时间分组？我尝试了这个,但它给出了错误"无效的列名'时间'.":

select Count(Page) as VisitingCount, CONVERT(VARCHAR(5), Date, 108) as [Time]
from scr_SecuristLog   
where Date between '2009-05-04 00:00:00' and '2009-05-06 14:58'  
and [user] in (select USERNAME from scr_CustomerAuthorities)  
group by [Time] order by [VisitingCount] asc

我也有同样的问题.但不同之处在于我的空行位于中间,我有超过50列.用户想要查看重复的行,这意味着我无法使用SELECT DISTINCT*FROM [excel]

空行可以在任何地方.到目前为止,我面临的最大优势超过100,000行.

是否有更有效的方法来删除空行或我必须循环并检查每一行中的所有列？

   void SelectDataFromExcel()
        {

            string connectionString = ConfigurationSettings.AppSettings["ExcelConn"].ToString();
            OleDbConnection excelConnection = new OleDbConnection(connectionString);
            excelConnection.Open();   
            OleDbCommand dbCommand;
            OleDbDataAdapter dataAdapter;
             foreach (var sheet in Sheets)
            {
                dbCommand = new OleDbCommand("select DISTINCT* From[" + sheet + "$]", excelConnection);
                System.Threading.Thread.Sleep(1000);
                this.Invoke((MethodInvoker)delegate
                {
                    listBox1.Items.Add("Tablo ismi: " + sheet.ToUpper(CultureInfo.InvariantCulture) + " Tablo Sat?r Say?s?: "+ dSet.Tables[sheet].Rows[0][0].ToString());
                });
                dataAdapter = new OleDbDataAdapter(dbCommand);
                dTable = new DataTable();
                dataAdapter.Fill(dTable);
                dTable.TableName = sheet.ToUpper(CultureInfo.InvariantCulture);;

                ArrangedDataList(dTable);
                FillSqlTable(dTable, dTable.TableName);
                dTable.Dispose();
                dataAdapter.Dispose();
                dbCommand.Dispose();
            }

            excelConnection.Close();
            excelConnection.Dispose();
            t1.Abort();
        }

如何将下面的代码更改为第二个类型:我尝试使用灵活的代码,如first => second usage ...

第一种类型

  private void Form1_Load(object sender, EventArgs e)
        {
            List<City> cities = new List<City>

            {   
                new City{ Name = "Sydney", Country = "Australia" },
                new City{ Name = "New York", Country = "USA" },
                new City{ Name = "Paris", Country = "France" },
                new City{ Name = "Milan", Country = "Spain" },
                new City{ Name = "Melbourne", Country = "Australia" },
                new City{ Name = "Auckland", Country = "New Zealand" },
                new City{ Name = "Tokyo", …

我是Asp.net Mvc3的新手.我不能这样做:如何使用Test方法显示列表但我不能写@ product.Test().我是新来的,你能帮助我吗？
视图:

@model IList<MvcApplicationScottGu.Models.ProductModel>

@{
    Layout = "~/Views/Shared/_Layout.cshtml";
    ViewBag.Title = "Product";
}

<h2>Product</h2>
<ul>
@foreach (var product in Model)

      <li>@product.Test()</li>

</ul>

控制器:

namespace MvcApplicationScottGu.Controllers
{
    public class ProductController : Controller
    {
        //
        // GET: /Product/

        public ActionResult Test()
        {
            var products = new ProductModel().GetProduct();
            return View("Product",products);
        }

    }
}

我想从mongo db获取整个通知列表，但是它返回empty（[]）数组，我也知道我需要回调或更短的方法。您是否有想法通过node.js从mongodb收集任何数据？如果我调用此/ Notify方法（http://127.0.0.1:5000/Notify）

var MongoClient = require('mongodb').MongoClient;
var express = require("express");
var app = express();


format = require('util').format;
MongoClient.connect('mongodb://127.0.0.1:27017/Test', function (err, db) {
    if (err) {
        throw err;
    } else {
        console.log("successfully connected to the database");
    }
    db.close();
});

app.get('/Notifies', function (req, res) {

    // BAD! Creates a new connection pool for every request
    console.log('connected');
    MongoClient.connect('mongodb://127.0.0.1:27017/Test', function (err, db) {
        if (err) throw err;

        var coll = db.collection('Notifies');
        var arr = [];
        coll.find({}, function (err, docs) {
            docs.each(function …

我打算在Web应用程序中使用vue.js. 但它无法加载,也没有在浏览器中激活html.请看下面的代码:

<!DOCTYPE html>
<html>
    <head>


<script>
var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!'
  }
});

</script>

&#060;/head&#062;
Run Code Online (Sandbox Code Playgroud)

<body> <div id ="app"> {{message}} </ div> <script src ="https://unpkg.com/vue/dist/vue.js"> </ script>

</ body> </ html>