C # Data Common operation functions

Using System;
Using System.Collections.Generic;
Using System.Text;
Using System.Data;
Using System.Data.SqlClient;
Using System.Configuration;

Namespace DBTest
{
public class Opactiondata
{
<summary>
Get the database connection address and receive it via the App. config file
</summary>
<returns> returns a connection string information </returns>
public static string Getconn ()
{
String conn = configurationmanager.appsettings["ConnectionString"];

/*

<?xml version= "1.0" encoding= "Utf-8"?>
<configuration>
<appSettings>
<!--The connection string is encrypted--
<add key= "Constringencrypt" value= "false"/>
<add key= "ConnectionString" value= "server=mis01;database=db;uid=uid;pwd=test123"/>
<!--<add key= "ConnectionString" value= "Server=192.168.1.254;database=db;uid=uid;pwd=ittest"/>-->
</appSettings>
</configuration>

*/

Return conn;
}
<summary>
Executes an SQL statement that returns a data set
</summary>
<param name= "SQL" >sql statements </param>
<returns> Return Data Set </returns>
public static DataSet GetDataSet (String sql)
{
Try
{
SqlConnection con = new SqlConnection (Getconn ());
SqlDataAdapter ad = new SqlDataAdapter (sql, con);
DataSet ds = new DataSet ();
Ad. Fill (DS);
return DS;
}
Catch
{
return null;
}
}
<summary>
Executes an SQL statement from the database and returns the execution result to a data table
</summary>
<param name= "SQL" >sql statements </param>
<returns> Returns a data table information </returns>
public static DataTable getdatetable (String sql)
{
Try
{
SqlConnection con = new SqlConnection (Getconn ());
SqlDataAdapter ad = new SqlDataAdapter (sql, con);
DataSet ds = new DataSet ();
Ad. Fill (DS);
Return DS. Tables[0];
}
Catch
{
return null;
}
}
<summary>
Executes an SQL statement and returns the result of the operation, returning
</summary>
<param name= "SQL" >sql statements </param>
<returns> return impact record number </returns>
public static int Getexecute (String sql)
{
SqlConnection con = new SqlConnection (Getconn ());
Try
{
Con. Open ();
SqlCommand com = new SqlCommand (sql, con);
int row = (int) com. ExecuteNonQuery ();
Con. Close ();
return row;
}
Catch
{
Con. Close ();
return 0;
}
}
<summary>
Executes an SQL statement and returns the first column of data in the first row
</summary>
<param name= "SQL" > Execute an SQL statement </param>
<returns> returns one row of data </returns>
public static Object Getexecutescalar (String sql)
{
SqlConnection con = new SqlConnection (Getconn ());
Try
{
Con. Open ();
SqlCommand com = new SqlCommand (sql, con);
Object row = com. ExecuteScalar ();
Con. Close ();
return row;
}
catch (Exception ex)
{
Con. Close ();
return null;
}
}
<summary>
Executes multiple SQL statements to implement database transactions.
</summary>
<param name= "sqlstringlist" > Multiple SQL statements </param>
public static int Executesqltran (list<string> sqlstringlist)
{
using (SqlConnection conn = new SqlConnection (Getconn ()))
{
Conn. Open ();
SqlCommand cmd = new SqlCommand ();
Cmd. Connection = conn;
SqlTransaction TX = conn. BeginTransaction ();
Cmd. Transaction = TX;
Try
{
int count = 0;
for (int n = 0; n < sqlstringlist.count; n++)
{
String strSQL = Sqlstringlist[n];
if (strSQL. Trim (). Length > 1)
{
Cmd.commandtext = strSQL;
Count + = cmd. ExecuteNonQuery ();
}
}
Tx.commit ();
return count;
}
Catch
{
Tx. Rollback ();
return 0;
}
}
}
}
}

This article is from the "Imagine the Sky" blog, please be sure to keep this source http://kinwar.blog.51cto.com/3723399/1671475

C # Data Common operation functions