小编use*_*412的帖子

我收到以下错误

可访问性不一致:参数类型'Db.Form1.ConnectionString'比方法'Db.Form1.BuildConnectionString(Db.Form1.ConnectionString)'更难访问

//Name spaces
using System;
using System.Collections.Generic;
using System.ComponentModel;
 using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
 using System.Windows.Forms;
using Microsoft.VisualBasic;
using System.Collections;
using System.Diagnostics;
using System.Data.OleDb;
using System.IO;
using System.Drawing.Printing;

 //
  namespace Db
{
  public partial class Form1 : Form
  {
     public Form1()
     {
        InitializeComponent();
     }
     public void SetBusy()
    {
        this.Cursor = Cursors.WaitCursor;
        Application.DoEvents();
    }
    public void SetFree()
    {
        this.Cursor = Cursors.Default;
        Application.DoEvents();
    }
   //connection string into parts
    struct ConnectionString
    {
        public string Provider;
        public string DataSource;
        public …

大家好我得到以下错误:"当前上下文中不存在名称'ConfigurationManager'"

// namespaces
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;
using System.IO;

namespace Database1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public static string GetConnectionString(string strConnection)
        {
            //variable to hold our connection string for returning it

            string strReturn = "";
            //check to see if the user provided a connection string name
            //this is for if your application has more than one …