в 15:30, 26 мая 2010

2010-05-26T15:30:47Z

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2010-05-26T11:51:02Z

1 версия

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==Implicit Transactions using TransactionScope==



<source lang="csharp">
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Transactions" %>
<%@ Import Namespace="System.Web.Configuration" %>
<script runat="server">
void btnSave_Click(object sender, EventArgs e)
{
try
{
int categoryID;
string connectionString = WebConfigurationManager.ConnectionStrings["AdventureWorks"].ConnectionString;
using (TransactionScope scope = new TransactionScope())
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
categoryID = InsertCategory(connection);
}
scope.ruplete();
}
lblResult.Text= "Category is written successfully. Category ID= " + categoryID.ToString();
}
catch (Exception ex)
{
lblResult.Text= "Exception is : " + ex.Message;
}
}

int InsertCategory(SqlConnection connection)
{
string sql = "Insert into Production.ProductCategory(Name," +
"rowguid, ModifiedDate) Values(@Name, @rowguid, @ModifiedDate); SELECT @@IDENTITY";
connection.Open();
SqlCommand command = new SqlCommand(sql, connection);
command.rumandType = CommandType.Text;
SqlParameter nameParam = new SqlParameter("@Name", SqlDbType.NVarChar, 50);
nameParam.Value = txtCategoryName.Text;
command.Parameters.Add(nameParam);
SqlParameter guidParam = new SqlParameter("@rowguid", SqlDbType.UniqueIdentifier);
guidParam.Value = System.Guid.NewGuid();
command.Parameters.Add(guidParam);
SqlParameter modifieDateParam = new SqlParameter("@ModifiedDate", SqlDbType.DateTime);
modifieDateParam.Value = System.DateTime.Now;
command.Parameters.Add(modifieDateParam);
int categoryID = Convert.ToInt32(command.ExecuteScalar());
return categoryID;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Implicit Transactions using TransactionScope</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="lblCategoryName" runat="server" Text="Category Name:" Width="179px"></asp:Label>
<asp:TextBox ID="txtCategoryName" runat="server"/>
 <asp:Button ID="btnSave" runat="server" Text="Save" Width="92px" OnClick="btnSave_Click"/>
<br/><br/>
<asp:Label ID="lblResult" runat="server" Font-Bold="true" Font-Size="Small" />
</div>
</form>
</body>
</html>
</source>

==Open connection and begin transaction==



<source lang="csharp">
<%@ Page Language="C#" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.SqlClient" %>
<script runat="server">
SqlTransaction _Transact;
void page_load(Object Sender, EventArgs E)
{

String ConnectionString = "Server=localhost; Database=pubs; uid=sa; pwd=;";
String CommandText = "UPDATE authors SET state="PU" WHERE state="UT"";
String CommandText2 = "UPDATE authors SET au_id="1" WHERE au_id="2"";

SqlConnection _Connection = new SqlConnection(ConnectionString);
SqlCommand _Command = new SqlCommand();

try{
_Connection.Open();
_Transact = _Connection.BeginTransaction();

_Command.Connection = _Connection;
_Command.Transaction = _Transact;

_Command.rumandText = CommandText;
_Command.ExecuteNonQuery();

_Command.rumandText = CommandText2;
_Command.ExecuteNonQuery();

_Transact.rumit();

MessageLiteralControl.Text = "Transaction Successful!";
}catch (Exception Err){
_Transact.Rollback();
MessageLiteralControl.Text = "Transaction Failed!<br/>" + Err.Message;
}
finally{
_Connection.Close();
}
}
</script>
<html>
<body>
<form runat="server" ID="Form1">
<p>
<asp:Label id="MessageLabel" runat="server" EnableViewState="false"></asp:Label>
</p>
</form>
</body>
</html>
</source>

==Using Explicit Transactions using CommittableTransaction==



<source lang="csharp">
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Transactions" %>
<%@ Import Namespace="System.Web.Configuration" %>
<script runat="server">
void btnSave_Click(object sender, EventArgs e) {
CommittableTransaction trans = new CommittableTransaction();
try {
string connectionString = WebConfigurationManager.ConnectionStrings["AdventureWorks"].ConnectionString;
using (SqlConnection connection = new SqlConnection(connectionString)) {
string sql = "Insert into Production.ProductCategory(Name,rowguid, ModifiedDate) Values(@Name, @rowguid, @ModifiedDate)";
connection.Open();
SqlCommand command = new SqlCommand(sql, connection);
command.rumandType = CommandType.Text;
SqlParameter nameParam = new SqlParameter("@Name", SqlDbType.NVarChar, 50);
nameParam.Value = txtCategoryName.Text;
command.Parameters.Add(nameParam);
SqlParameter guidParam = new SqlParameter("@rowguid", SqlDbType.UniqueIdentifier);
guidParam.Value = System.Guid.NewGuid();
command.Parameters.Add(guidParam);
SqlParameter modifieDateParam = new SqlParameter("@ModifiedDate", SqlDbType.DateTime);
modifieDateParam.Value = System.DateTime.Now;
command.Parameters.Add(modifieDateParam);

connection.EnlistTransaction(trans);
command.ExecuteNonQuery();
trans.rumit();
}
lblResult.Text = "Category is written successfully";
}
catch (Exception ex)
{
trans.Rollback();
lblResult.Text = "Exception is : " + ex.Message;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Using Explicit Transactions using CommittableTransaction</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="lblCategoryName" runat="server" Text="Category Name:" Width="179px"></asp:Label>
<asp:TextBox ID="txtCategoryName" runat="server"/>
 
<asp:Button ID="btnSave" runat="server" Text="Save" Width="92px" OnClick="btnSave_Click"/>
<br/><br/>
<asp:Label ID="lblResult" runat="server" Font-Bold="true" Font-Size="Small" />
</div>
</form>
</body>
</html>
</source>

==Working with Transactions with an SQL Server Database==



<source lang="csharp">
<%@ Page Language=VB Debug=true %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SQLClient" %>
<script runat=server>
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
Dim DBConn as SQLConnection
Dim DBDelete As New SQLCommand
Dim DBTrans As SQLTransaction
" DBConn = New SQLConnection("server=localhost;" _
" & "Initial Catalog=TT;" _
" & "User Id=sa;" _
" & "Password=yourpassword;")
DBConn = New SQLConnection("Data Source=whsql-v08.prod.mesa1.secureserver.net;Initial Catalog=DB_49907;User ID=nfexuser;Password="password";")
DBConn.Open()
DBTrans = DBConn.BeginTransaction()
DBDelete.Connection = DBConn
DBDelete.Transaction = DBTrans
DBDelete.rumandText = "Delete From Employee " _
& "Where ID = 1"
DBDelete.ExecuteNonQuery()
DBDelete.rumandText = "Delete From Employee " _
& "Where ID = 2"
DBDelete.ExecuteNonQuery()
DBTrans.RollBack()
lblMessage.Text = "No action was taken."
"DBTrans.rumit()
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Working with Transactions with an SQL Server Database</TITLE>
</HEAD>
<Body LEFTMARGIN="40">
<form runat="server">
<BR><BR>
<asp:label
id="lblMessage"
runat="Server"
/>
</form>
</BODY>
</HTML>

</source>

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ASP.Net/ADO.net Database/Transaction SqlConnection - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия