使用类型化数据集与非类型化数据集完成用户信息的增删查改（作业整理）

期末因为时间赶得紧，做的很不好。原想加入事件、存储过程等后来都没加进去。而且还得帮着其他同学做作业，自己的作业做的还有很多地方需要完善的。

一、采用非类型化数据集完成

using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;


namespace ADO.NET作业二采用非类型化数据集
{
class Program
{
static void Main(string[] args)
{
//采用非类型化数据集
DataSet ds = new DataSet();
//string str = ConfigurationManager.ConnectionStrings["sqlstring"].ConnectionString;
string str = "Data Source=.;" + "Initial Catalog=BookDB;" + "Integrated Security=True";
try
{
using (SqlConnection sqlcon = new SqlConnection(str))
{
SqlCommand cmd = sqlcon.CreateCommand();
cmd.CommandText = "select * from Books";
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
adapter.Fill(ds,"Books");

//1、修改第一条记录,修改后的记录为(1,操作系统，35，清华大学出版社)
ds.Tables["Books"].Rows[0]["BookPrice"] = "35";
ds.Tables["Books"].Rows[0]["BookPress"] = "清华大学出版社";

//2、插入一条记录（4,数据结构，32.5，高教出版社）。
DataRow dr = ds.Tables["Books"].NewRow();

dr["BookId"]= 4;
dr["BookTitle"] = "数据结构";
dr["BookPrice"] = 32.5F;
dr["BookPress"] = "高教出版社";
ds.Tables["Books"].Rows.Add(dr);

foreach (DataRow row in ds.Tables["Books"].Rows)
{
foreach (DataColumn column in ds.Tables["Books"].Columns)
{
Console.WriteLine("{0} Current={1}",column.ColumnName,row[column,DataRowVersion.Current]);
Console.WriteLine("Default ={0}",row[column,DataRowVersion.Default]);
//Console.WriteLine("Original={0}", row[column, DataRowVersion.Original]);
//因为新添加的行没有原始值所以需要判断
if (dr["BookId"].Equals(4))
{
Console.WriteLine("{0} Current={1}", column.ColumnName, row[column, DataRowVersion.Current]);
Console.WriteLine("Default ={0}", row[column, DataRowVersion.Default]);

/*if (column.ColumnName == "BookId" && dr["BookId"].Equals(4) )
{
Console.WriteLine("{0} Current={1}", column.ColumnName, row[column, DataRowVersion.Current]);
Console.WriteLine("Default ={0}", row[column, DataRowVersion.Default]);
}*/

}
else
{
Console.WriteLine("Original={0}",row[column,DataRowVersion.Original]);
}

Console.WriteLine();
}
}

Console.WriteLine("删除第三条记录并输出其状态：");
Console.WriteLine();
//3、删除第三条记录.
ds.Tables["Books"].Rows[2].Delete();
Console.WriteLine("{0}", ds.Tables["Books"].Rows[2].RowState);
}
}
catch(SqlException e)
{
Console.WriteLine("{0}",e.Message);
}
Console.ReadLine();
}
}
}

//DataRow[] rows = ds.Tables[0].Select("name='张三'");

//查找

//Response.Write(rows[0]["name"].ToString()+rows[0]["password"]);

//DataRow []rows=t.Select("Dname='"+TextBox3 .Text .Trim ()+"'","id DESC");

SqlCommandBuilder builder = new SqlCommandBuilder(adapter);

adapter.Update(ds, "Users");//这句话必须有否则只能更新视图不能更新数据库

this.GridView1.DataSource = ds.Tables[0];

this.GridView1.DataBind();

结果截图：

二、采用类型化数据集完成

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Configuration;

using System.Data;

namespace ADO.NET作业

{

class Program

{

//采用类型化数据集

static void Main(string[] args)

{

BookDBDataSetTableAdapters.BooksTableAdapter adapter =

new BookDBDataSetTableAdapters.BooksTableAdapter();

BookDBDataSet.BooksDataTable table=new BookDBDataSet.BooksDataTable();

adapter.Fill(table);

//1、修改第一条记录,修改后的记录为(1,操作系统，35，清华大学出版社)

table [0].BookPrice=35;

table[0].BookPress="清华大学出版社";

//2、插入一条记录（4,数据结构，32.5，高教出版社）。

BookDBDataSet.BooksRow row= table.NewBooksRow();

row.BookId = 4;

row.BookTitle="数据结构";

row.BookPrice=32.5F;

row.BookPress="高等教育出版社";

table.Rows.Add(row);

/*var queryResult=from r in table

where (bool)r[2]

select r;*/

Console.WriteLine("输出以改变的数据表-未删除第三条记录");

Console.WriteLine();

foreach (DataRow dataRow in table.Rows)

{

foreach (DataColumn dataColumn in table.Columns)

{

Console.WriteLine("{0} Current= {1}",dataColumn.ColumnName,

dataRow[dataColumn,DataRowVersion.Current]);

Console.WriteLine("Default={0}", dataRow[dataColumn, DataRowVersion.Default]);

if (row.BookId.Equals(4))

{

Console.WriteLine("{0} Current= {1}", dataColumn.ColumnName,

dataRow[dataColumn, DataRowVersion.Current]);

Console.WriteLine("Default={0}", dataRow[dataColumn, DataRowVersion.Default]);

}

else

{

Console.WriteLine("Original={0}", dataRow[dataColumn, DataRowVersion.Original]);

}

}

}

Console.WriteLine("删除第三条记录并输出其状态：");

Console.WriteLine();

//3、删除第三条记录

table[2].Delete();

Console.WriteLine("第三条记录的状态:{0}", table[2].RowState);

Console.ReadLine();

}

}

}

DataRow[] rows = table.Select("name='张三'"); //查找

Response.Write(rows[0]["uid"] + " | " + rows[0]["name"].ToString() + " | " + rows[0]["password"] + " | " + rows[0]["power"] + " | " + rows[0]["lock"]);

adapter.Update(table); //这句话必须有否则只能更新视图不能更新数据库

this.GridView1.DataSource = table;

this.GridView1.DataBind();

结果截图：