linq to sqlite 查询成功，更新和插入失败？附上源码，请帮忙调试
本帖最后由 q107770540 于 2013-06-29 21:34:23 编辑

// 
//  ____  _     __  __      _        _ 
// |  _ \| |__ |  \/  | ___| |_ __ _| |
// | | | | '_ \| |\/| |/ _ \ __/ _` | |
// | |_| | |_) | |  | |  __/ || (_| | |
// |____/|_.__/|_|  |_|\___|\__\__,_|_|
//
// Auto-generated from main on 2013-06-29 10:07:33Z.
// Please visit http://code.google.com/p/dblinq2007/ for more information.
//
namespace Demo
{
using System;
using System.ComponentModel;
using System.Data;

using DbLinq.Data.Linq;
using DbLinq.Vendor;

using System.Data.Linq.Mapping;
using System.Diagnostics;


public partial class main : DataContext
{

#region Extensibility Method Declarations
partial void OnCreated();
#endregion


public main(string connectionString) : 
base(connectionString)
{
this.OnCreated();
}

public main(string connection, MappingSource mappingSource) : 
base(connection, mappingSource)
{
this.OnCreated();
}

public main(IDbConnection connection, MappingSource mappingSource) : 
base(connection, mappingSource)
{
this.OnCreated();
}

public Table<Product> Product
{
get
{
return this.GetTable<Product>();
}
}
}

#region Start MONO_STRICT

public partial class main
{

public main(IDbConnection connection) : 
base(connection)
{
this.OnCreated();
}
}

#endregion


#region End Not MONO_STRICT
#endregion
// MONO_STRICT

    [Table(Name = "main.Product" ) ]
public partial class Product
{
        private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);

private string _prodCode; 
 

private string _prodName;

#region Extensibility Method Declarations
   partial void OnCreated();

       partial void OnProdCodeChanged();

       partial void OnProdCodeChanging(string value);

partial void OnProdNameChanged();

        partial void OnProdNameChanging(string value);
#endregion


public Product()
{
this.OnCreated();
}

        [Column(Storage = "_prodCode", Name = "ProdCode", DbType = "CHAR(12)", AutoSync = AutoSync.Never, CanBeNull = false, IsPrimaryKey = true)]
[DebuggerNonUserCode()]
public string ProdCode
{
get
{
return this._prodCode;
}
set
{
if (((_prodCode == value) 
== false))
{
this.OnProdCodeChanging(value);
this._prodCode = value;
this.OnProdCodeChanged();
}
}
}

[Column(Storage="_prodName", Name="ProdName", DbType="CHAR(40)", AutoSync=AutoSync.Never)]
[DebuggerNonUserCode()]
public string ProdName
{
get
{
return this._prodName;
}
set
{
if (((_prodName == value) 
== false))
{
this.OnProdNameChanging(value);
this._prodName = value;
this.OnProdNameChanged();
}
}
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SQLite;
using System.Linq;


namespace Demo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        { 
            //不适用Linq
            string constr = string.Format("Data Source =\"{0}\";", @"myServer.db");  
 
            SQLiteConnection con = new SQLiteConnection(constr);
            con.Open();
            SQLiteCommand com = new SQLiteCommand();
            com.Connection = con;
            com.CommandType = CommandType.Text;
            com.CommandText = "Update Product set ProdName='llf' where ProdCode='001'";
            com.ExecuteNonQuery();
        }
        public static IDbConnection GetConnection()
        {
            
            var filename = string.Format("myServer.db");
            return new System.Data.SQLite.SQLiteConnection("data source=" + filename) as IDbConnection;
        }
        private void button2_Click(object sender, EventArgs e)
        {
            //读取Linq
            main comn = new main(Form1.GetConnection());
            var Product1 = from o in comn.Product                             
                             select o;

            foreach (var item in Product1)
            {
                MessageBox.Show( string.Join("/", new string[] { item.ProdCode.ToString(), item.ProdName.ToString() }) + "\n");
            } 
 
            
            MessageBox.Show("ok!");
        }

        private void button3_Click(object sender, EventArgs e)
        {
            //写入Linq
            Product product1 = new Product();
 
            main comn = new main(Form1.GetConnection());
            
            product1.ProdCode = "0002"; 
             
            product1.ProdName = "00001";
            comn.Product.InsertOnSubmit(product1);
            comn.SubmitChanges();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            //修改Linq
            main comn = new main(Form1.GetConnection());
            Product product = comn.Product.Single(c => c.ProdCode == "001");
            if (product != null)
            {
                product.ProdName = "测试更改";
                comn.SubmitChanges();
            }

        }
    }
}

源代码

[解决办法]
Product 表,没有主键?
[解决办法]
你最好把Product的结构贴出来
[解决办法]
这文件头部的注释 真闪眼哈
没想到都有 linq to sqlite 了。。。。