ASP.Net/ADO.net Database/Transaction SqlConnection
Содержание
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">
<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"/>
<asp:Label ID="lblResult" runat="server" Font-Bold="true" Font-Size="Small" />
</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!
" + Err.Message;
}
finally{
_Connection.Close();
}
} </script> <html>
<body> <form runat="server" ID="Form1">
<asp:Label id="MessageLabel" runat="server" EnableViewState="false"></asp:Label>
</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">
<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"/>
<asp:Label ID="lblResult" runat="server" Font-Bold="true" Font-Size="Small" />
</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">
<asp:label
id="lblMessage" runat="Server"
/> </form> </BODY> </HTML>
</source>
