在Windows Phone 7 app dev中需要帮助..... [英] need help in windows phone 7 app dev.....
问题描述
那里，
我对这个所谓的"windows phone 7"都很陌生。应用程序 开发
i m all new to this so called "windows phone 7" application development
我正在开发一个多语言。字典应用程序
i m developing an a multi lang. dictionary app
nm在使用数据库时遇到问题（隔离存储）
n m facing problems in working with the database(isolated storage)
我的应用程序的工作如下：
working of my app is as follows:
一个菜单页面
有四个菜单按钮，用于四个不同的词典
having four menu buttons for four diff lang dictionaries
每个按钮导航到一个新页面（对应于该页面） la diction。（4页））
each button navigates to a new page (corresponding to that lang diction.(4 pages))
每个词典。将拥有自己的数据库
each dict. will have its own database
界面就像（两个文本框 {1。用于搜索单词，其他用于搜索结果和一个搜索按钮}）
interface is like(two text boxes {1. for word to be searched and other for result and a button to search})
将在数据库中搜索第一个文本框中的字符串，如果找到，则相应的含义将显示在另一个文本框中
the string from the first text box will be searched in the db and if found then corresponding meaning will be displayed on the other textbox
..... im使用以下代码：
.....i m using the following codes:
使用System;
使用System.Collections.Generic;
使用System.Linq;
使用System.Net ;
使用System.Windows;
使用System.Windows.Controls;
使用System.Windows.Documents;
使用System.Windows.Input;
使用System.Windows.Media;
使用System.Windows.Media.Animation;
使用System.Windows.Shapes;
使用Microsoft.Phone.Controls;
使用System.Windows.Ink;
使用System.Data.Linq .Mapping;
使用System.Data.Linq;
使用System.Resources;
使用System.Data.Services;
使用PhoneApp6.ServiceReference1;
使用System.Collections.ObjectModel;
使用System.ComponentModel;
使用System。 IO.IsolatedStorage;
使用System.Linq.Expressions;
使用System.Text.RegularExpressions;
使用System.Text;
使用System.Xml.Serialization;
使用System.IO;
使用System.Runtime;
命名空间PhoneApp6
{
  public partial class Page4：PhoneApplicationPage
  {public const string ConnectionString = @" isostore：/engSansDB.sdf" ;;
     公共Page4（）
      {InitializeComponent（）;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using System.Windows.Ink;
using System.Data.Linq.Mapping;
using System.Data.Linq;
using System.Resources;
using System.Data.Services;
using PhoneApp6.ServiceReference1;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO.IsolatedStorage;
using System.Linq.Expressions;
using System.Text.RegularExpressions;
using System.Text;
using System.Xml.Serialization;
using System.IO;
using System.Runtime;
namespace PhoneApp6
{
public partial class Page4 : PhoneApplicationPage
{public const string ConnectionString = @"isostore:/engSansDB.sdf";
public Page4()
{ InitializeComponent();
}
[表（Name =" engsansdict"）]
     公共课程engSans
      {
          [Column（IsPrimaryKey = true，IsDbGenerated = true，CanBeNull = false，AutoSync = AutoSync.OnInsert）]¥b $ b          公共字符串英文
          {get;组; }¥b $ b   [栏目（CanBeNull = false）]
$
$
  public string sans
          {get;组; }¥b $ b       }
      public class engSansDataContext：DataContext
      {public engSansDataContext（string connectionString）
          ：base（connectionString）
      {}
&NBSP; &NBSP; &NBSP; public Table< engSans> englishsans {
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP;得到{return this.GetTable< engSans>（）;}
&NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; &NBSP; private void addData（）
&NBSP; &NBSP; &NBSP; {
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; using（engSansDataContext context = new engSansDataContext（ConnectionString））
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; {
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; engSans obj = new engSans（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; obj.english =" cow"; $
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; context.englishsans.InsertOnSubmit（obj）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; engSans obj1 = new engSans（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; obj.sans =" gau";
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; context.englishsans.InsertOnSubmit（obj）;
$
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; context.SubmitChanges（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; &NBSP; }¥b $ b &NBSP; &NBSP; public IList< engSans> getengSansList（）
&NBSP; &NBSP; &NBSP; {
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP;的IList< engSans> elist = null;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; using（engSansDataContext context = new engSansDataContext（ConnectionString））
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; {
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; IQueryable的< engSans> query = from sans in context.englishsans select sans;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; elist = query.ToList（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; } return elist;
&NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; public void createDB（）
&NBSP; &NBSP; {
&NBSP; &NBSP; &NBSP; &NBSP; using（engSansDataContext context = new engSansDataContext（ConnectionString））
&NBSP; &NBSP; &NBSP; &NBSP; {
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; if（context.DatabaseExists（）== false）
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; {
$
$
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; //创建数据库（如果不存在）
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; context.englishsans.Context.CreateDatabase（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; MessageBox.Show（"成功创建员工数据库!!!"）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; }
&NBSP; &NBSP; private void button1_Click（object sender，RoutedEventArgs e）
&NBSP; &NBSP; {
$
&NBSP; &NBSP; &NBSP; &NBSP; 试试
&NBSP; &NBSP; &NBSP; &NBSP; { IList< engSans> elist = this.getengSansList（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;列表与LT; engSans> ob = new List< engSans>（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; engSans ob1 = new engSans（）;
&NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; textBox3.Text = ob1.sans;
&NBSP; &NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; &NBSP; &NBSP; catch {}
$
&NBSP; &NBSP; }
$
&NBSP; &NBSP; &NBSP; private void textBox1_TextChanged（object sender，TextChangedEventArgs e）
&NBSP; &NBSP; &NBSP; {
$
&NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; &NBSP; private void textBox3_TextChanged（object sender，TextChangedEventArgs e）
&NBSP; &NBSP; &NBSP; {
$
&NBSP; &NBSP; &NBSP; }
&NBSP; &NBSP; &NBSP; private void textBox2_TextChanged（object sender，TextChangedEventArgs e）
&NBSP; &NBSP; &NBSP; {
$
&NBSP; &NBSP; &NBSP; }
&NBSP; }¥b $ b} &NBSP;
}
[Table(Name= "engsansdict")]
public class engSans
{
[Column(IsPrimaryKey = true, IsDbGenerated = true, CanBeNull = false, AutoSync = AutoSync.OnInsert)]
public string english
{ get; set; }
[Column(CanBeNull = false)]
public string sans
{ get; set; }
}
public class engSansDataContext : DataContext
{ public engSansDataContext(string connectionString)
:base(connectionString)
{}
public Table<engSans>englishsans{
get{return this.GetTable<engSans>();}
}
}
private void addData()
{
using (engSansDataContext context = new engSansDataContext(ConnectionString))
{
engSans obj = new engSans();
obj.english = "cow";
context.englishsans.InsertOnSubmit(obj);
engSans obj1 = new engSans();
obj.sans = "gau";
context.englishsans.InsertOnSubmit(obj);
context.SubmitChanges();
}
}
public IList<engSans>getengSansList()
{
IList<engSans> elist = null;
using (engSansDataContext context = new engSansDataContext(ConnectionString))
{
IQueryable<engSans> query = from sans in context.englishsans select sans;
elist = query.ToList();
} return elist;
}
public void createDB()
{
using (engSansDataContext context = new engSansDataContext(ConnectionString))
{
if (context.DatabaseExists() == false)
{
// create database if it does not exist
context.englishsans.Context.CreateDatabase();
MessageBox.Show("Employee Database Created Successfully!!!");
}
}
}
private void button1_Click(object sender, RoutedEventArgs e)
{
try
{ IList<engSans> elist = this.getengSansList();
List<engSans> ob = new List<engSans>();
engSans ob1 = new engSans();
textBox3.Text = ob1.sans;
}
catch { }
}
private void textBox1_TextChanged(object sender, TextChangedEventArgs e)
{
}
private void textBox3_TextChanged(object sender, TextChangedEventArgs e)
{
}
private void textBox2_TextChanged(object sender, TextChangedEventArgs e)
{
}
}
}
但它不起作用....按钮是做"没事"...请帮助我....请......如果我在button_click func中删除异常。然后点击按钮就会发出运行时错误..未处理的异常..."未定义db的路径"
或"db不存在"类似的东西，并显示绿色标记..."elist.query = tolist（）;"
but its not working....the button is doing "nothing"...pls help me ....please......if i remove the exception in button_click func. then at the click of the button it gives a runtime error ..unhandled exception..."db's path is not defined" or"db doesn't exist" something like that and shows a green mark over..."elist.query=tolist();"
推荐答案
嗨nikzz ，
Hi nikzz,
engSansDB.sdf ？你一定非常。您的应用找不到您的
数据库。当你打电话给 createDB（）方法？
engSansDB.sdf exists in your isolatedstorage at runtime? You must very that. You app doesn't find your DB. When you call to createDB() method?
问候。
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