Sqlcommand.Connection = SqlConn Sqlcommand.CommandType = CommandType.StoredProcedure Sqlcommand.CommandText = "pBillandStockComp" Sqlcommand.CommandTimeout = 600 With Sqlcommand.Parameters .Add("@SDate", SqlDbType.VarChar) .Add("@EDate", SqlDbType.VarChar) .Add("@Area", SqlDbType.VarChar) .Add...
InsertCommand UpdateCommand DeleteCommandSqlCommand对象负责将特定查询发送到数据库,并且具有以下属性:CommandText,其中包含要执行的即席 SQL 语句或存储过程;和 Parameters,它是 对象的集合SqlParameter。 正如我们在创建数据访问层教程中看到的那样,可以通过属性...
Dim myCommand As New With .CommandType = CommandType.StoredProcedure .Parameters.Add("@CodeType", SqlDbType.VarChar, 20).Value = " 年级编码" .Parameters.Add("@NewCode", SqlDbType.VarChar, 20).Direction = ParameterDirection.Output Try .ExecuteNonQuery() Return Catch ex As Return 无编码生成" ...
Dim SQLCOMMANDSTRING As String = "UPDATE Contacts Set Field = @Value Where [FirstName] = @firstname" Dim SqlCommand As New SqlCommand(SQLCOMMANDSTRING, SqlConnection) Dim Count As Integer With SqlCommand.Parameters .AddWithValue("@firstname", MatchFirstName.Text) .AddWithValue("@value", NewValue...
" ' Open the catalog Set cat.ActiveConnection = cnn ' Get the command object Set cmd = cat.Procedures("CustomerById").Command ' Retrieve Parameter information cmd.Parameters.Refresh For Each prm In cmd.Parameters Debug.Print prm.Name & ":" & prm.Type Next 'Clea...
SqlCommand 对象负责向数据库发送特定的查询,其属性如下:CommandText ,其中包含要执行的 ad-hoc SQL 语句或存储过程;以及 Parameters ,即 SqlParameter 对象集合。正如我们在创建数据访问层教程中讨论的那样,用户可以通过 Properties 窗口自定义这些命令对象。 除了主查询外,TableAdapter 还可以包含多个方法,这些方法在调用时...
CommandText = SqlStr, .CommandType = CommandType.Text, .Connection = ConnectionObject, .CommandTimeout = 0 } Using AdpObject As New MySqlDataAdapter With {.SelectCommand = CmdObject} Using Dt As New DataTable() AdpObject.Fill(Dt) CmdObject.Parameters.Clear() Return Dt End Using End Using ...
Visual Studio 2010集成开发环境(IDE)的界面被重新设计和组织,变得更加简单明了。Visual Studio 2010同时带来了 NET Framework 4.0、Microsoft Visual Studio 2010 CTP( Community Technology Preview–CTP),并且支持开发面向Windows 7的应用程序。除了MicrosoftSQL Server,它还支持 IBM DB2和Oracle数据库等。
publicstaticDataSetSelectSqlRows(stringconnectionString,stringqueryString,stringtableName){using(SqlConnection connection =newSqlConnection(connectionString)) { SqlDataAdapter adapter =newSqlDataAdapter(); adapter.SelectCommand =newSqlCommand(queryString, connection); SqlCommandBuilder builder =newSqlComm...
myCommand.Parameters.Clear() iCounter = iCounter + 1 Next Me.PBPercent.Value = 0 End Sub 'Renews StockList as you can see i use FOR EACH and each time i executes i make new sqlQuery and execute it on server. But such solution is used only because i didn't find how to ...