怎样从数据库中读取时间C#
我数据库里有张表，怎么样重表里把时间从数据库中读取出来，大家帮帮我想想办法！ --------------------编程问答-------------------- C#操作数据库会吧，查询。。select 时间 from tb where ..--------------------编程问答-------------------- 和读别的字段是一样的 --------------------编程问答--------------------
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
namespace DatabaseOperate
{
class SqlOperateInfo
{
//Suppose your ServerName is "aa",DatabaseName is "bb",UserName is "cc", Password is "dd"
private string sqlConnectionCommand = "Data Source=aa;Initial Catalog=bb;User ID=cc;Pwd=dd";
//This table contains two columns:KeywordID int not null,KeywordName varchar(100) not null
private string dataTableName = "Basic_Keyword_Test";
private string storedProcedureName = "Sp_InertToBasic_Keyword_Test";
private string sqlSelectCommand = "Select KeywordID, KeywordName From Basic_Keyword_Test";
//sqlUpdateCommand could contain "insert" , "delete" , "update" operate
private string sqlUpdateCommand = "Delete From Basic_Keyword_Test Where KeywordID = 1";
public void UseSqlReader()
{
SqlConnection sqlConnection = new SqlConnection(sqlConnectionCommand);
SqlCommand sqlCommand = new SqlCommand();
sqlCommand.CommandType = System.Data.CommandType.Text;
sqlCommand.Connection = sqlConnection;
sqlCommand.CommandText = sqlSelectCommand;
sqlConnection.Open();
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
while(sqlDataReader.Read())
{
//Get KeywordID and KeywordName , You can do anything you like. Here I just output them.
int keywordid = (int)sqlDataReader[0];
//the same as: int keywordid = (int)sqlDataReader["KeywordID"]
string keywordName = (string)sqlDataReader[1];
//the same as: string keywordName = (int)sqlDataReader["KeywordName"]
Console.WriteLine("KeywordID = " + keywordid + " , KeywordName = " + keywordName);
}
sqlDataReader.Close();
sqlCommand.Dispose();
sqlConnection.Close();
}
public void UseSqlStoredProcedure()
{
SqlConnection sqlConnection = new SqlConnection(sqlConnectionCommand);
SqlCommand sqlCommand = new SqlCommand();
sqlCommand.CommandType = CommandType.StoredProcedure;
sqlCommand.Connection = sqlConnection;
sqlCommand.CommandText = storedProcedureName;
sqlConnection.Open();
sqlCommand.ExecuteNonQuery();
//you can use reader here,too.as long as you modify the sp and let it like select * from ....
sqlCommand.Dispose();
sqlConnection.Close();
}
public void UseSqlDataSet()
{
SqlConnection sqlConnection = new SqlConnection(sqlConnectionCommand);
SqlCommand sqlCommand = new SqlCommand();
sqlCommand.CommandType = System.Data.CommandType.Text;
sqlCommand.Connection = sqlConnection;
sqlCommand.CommandText = sqlSelectCommand;
sqlConnection.Open();
SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();
sqlDataAdapter.SelectCommand = sqlCommand;
DataSet dataSet = new DataSet();
//sqlCommandBuilder is for update the dataset to database
SqlCommandBuilder sqlCommandBuilder = new SqlCommandBuilder(sqlDataAdapter);
sqlDataAdapter.Fill(dataSet, dataTableName);
//Do something to dataset then you can update it to Database.Here I just add a row
DataRow row = dataSet.Tables[0].NewRow();
row[0] = 10000;
row[1] = "new row";
dataSet.Tables[0].Rows.Add(row);
sqlDataAdapter.Update(dataSet, dataTableName);
sqlCommand.Dispose();
sqlDataAdapter.Dispose();
sqlConnection.Close();
}
}
} --------------------编程问答-------------------- select timeColumn from table_name
不太明白楼主的问题。 --------------------编程问答-------------------- select 字段 from 表名
--------------------编程问答-------------------- string str = this.TreeView1.SelectedNode.Text;
string a = this.TextBox1.Text;
string b = this.TextBox2.Text;
DateTime c = DateTime.Parse(this.TextBox3.Text);
string d = this.TextBox4.Text;
db.open();
try
{
string strinsert = "insert into " + str + " values ('" + a + "','" + b + "','" + c + "','" + d + "')";
sqladap = new SqlDataAdapter(strinsert, db.sqlcon);
sqladap.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
读取时间 这不是一摸一样的么。。 --------------------编程问答-------------------- 也是一个列吧，和其他列一样取法 --------------------编程问答-------------------- 用ToLongTimeString()函数试一试。 --------------------编程问答-------------------- 读完之后转换成时间就行了嘛.
补充：.NET技术 , C#
