小编Beg*_*ner的帖子

我使用C#插入数据以访问2000-2003文件格式数据库.当我有一个包含2个字段的数据库时,查询工作正常,但是当有更多字段时,它不起作用.

我有两个相同的代码,我无法找到问题.

using System.Data.OleDb;    // By using this namespace I can connect to the Access Database.

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private OleDbConnection myconn;
        public Form1()
        {
            InitializeComponent();
            myconn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\leelakrishnan\Desktop\NewManageContacts.mdb");
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'newManageContactsDataSet.Contacts' table. You can move, or remove it, as needed.
           // this.contactsTableAdapter.Fill(this.newManageContactsDataSet.Contacts);
            // TODO: This line of code loads data into the 'newManageContactsDataSet.Contacts' table. …

这是我从给定字符串中查找最大单词的代码.我已经得到了字符串中所有单词的长度,现在如何获得要打印出来的最大单词？我试图获得所有最大的单词,但我无法使用此代码PLZ帮助？

using System;
using System.Linq; 
class largest1{
    public void largest(){
        Console.WriteLine("Enter the String:");

        string buffer1 = Console.ReadLine();
        string[] buffer = buffer1.Split(' ');
        int length;
        string largestword = buffer[0];

        for(int i = 0; i < buffer.Length; i++){
            string temp = buffer[i];
            length = temp.Length;

            if( largestword.Length < buffer[i].Length ) {
                largestword = buffer[i];
            }
        }

        var largestwords = from words in buffer
                            let x =  largestword.Length
                            where words.Length == x 
                            select words;

        Console.Write("Largest words are:");      
        foreach(string s in largestwords){
            Console.Write(s);
        } …

我从用户那里得到一个字符串,然后把它放在一个char数组中.现在我想显示字符串中的所有字符以及它们出现的次数.我的代码如下请纠正我？

 using System;
 class count
 {
    public void charcount()
    {
       int i ;
       int count = 0;
       string s;
       Console.WriteLine("Enter the String:");
       s = Console.ReadLine();
       char[] carr = s.ToCharArray();
       for(i = 0; i < carr.Length; i++)
       {
         for(int j = 1; j < carr.Length; j++)
             {
               if(carr[j] == carr[i])
                       {
                count++;
                   }
                   else
                       {
                    return;
               }
               Console.WriteLine("The Character " + carr[i] + " appears " + count);
         }
       }        
    }

    static void Main()
    {
       count obj = new count();
       obj.charcount(); …