adding restrictions to datatable and datacolumn objects phần 2

... constraints to the DataTable objects. Next, you'll see how to add restrictions to DataColumn objects. Adding Restrictions to DataColumn Objects In this section, you'll see how to add restrictions ... restrictions to the DataColumn objects stored in a DataTable. Specifically, you'll see how to set the AllowDBNull, AutoIncrement, AutoIncrementSeed, AutoIncrementStep, ReadOnly, and Unique ... ProductID myDataColumn.DataType = System.Int 32 myDataColumn.AllowDBNull = False myDataColumn.AutoIncrement = True myDataColumn.AutoIncrementSeed = -1 myDataColumn.AutoIncrementStep = -1 myDataColumn.MaxLength...

Ngày tải lên: 24/12/2013, 01:17

... call to Fill(). You can use one of following ways to add restrictions to DataTable and DataColumn objects: • Add the restrictions yourself by setting the properties of your DataTable and DataColumn ... how to • Add constraints to the Products, Orders, and Order Details DataTable objects. • Restrict the values placed in the DataColumn objects of the Products DataTable. Adding Constraints to ... DataTable and DataColumn objects yourself using the properties of the DataTable and DataColumn objects. For example, assume you have a DataSet object named myDataSet that contains three DataTable objects...

Ngày tải lên: 24/12/2013, 01:17

... OrderID myDataColumn.DataType = System.Int 32 myDataColumn.AllowDBNull = False myDataColumn.AutoIncrement = True myDataColumn.AutoIncrementSeed = 0 myDataColumn.AutoIncrementStep = 1 myDataColumn.MaxLength ... ProductID myDataColumn.ColumnName = OrderID myDataColumn.DataType = System.Int 32 myDataColumn.AllowDBNull = False myDataColumn.AutoIncrement = False myDataColumn.AutoIncrementSeed = 0 myDataColumn.AutoIncrementStep ... = False myDataColumn.AutoIncrement = False myDataColumn.AutoIncrementSeed = 0 myDataColumn.AutoIncrementStep = 1 myDataColumn.MaxLength = -1 myDataColumn.ReadOnly = False myDataColumn.Unique...

Ngày tải lên: 24/12/2013, 01:17

... OleDbCommand myOleDbCommand = myOleDbConnection.CreateCommand(); // set the CommandType property of the OleDbCommand object to // TableDirect myOleDbCommand.CommandType = CommandType.TableDirect; ... object: OleDbCommand myOleDbCommand = myOleDbConnection.CreateCommand(); You then set the CommandType of myOleDbConnection to CommandType.TableDirect: myOleDbCommand.CommandType = CommandType.TableDirect; ... myDataRow[myDataColumn]); if (myDataColumn.ToString() == "ProviderType") { ); SqlCommand mySqlCommand = mySqlConnection.CreateCommand(); mySqlCommand.CommandText = "SELECT...

Ngày tải lên: 07/11/2013, 10:15

... one. To do so: 1. Start the Active Directory Users and Computers MMC snap-in, right-click the name of the domain of interest, and select the Properties command from the context menu. 2. Go to ... Note To immediately view RSoP for the current user on the local Windows Server 20 03 computer, click the Start button, select the Run command, enter the rsop.msc command into the Open field, and ... improvement, since it allows administrators to plan, monitor, and troubleshoot Group Policy. These capabilities in Windows 20 00 were limited; only a GPResult.exe command-line Resource Kit utility was...

Ngày tải lên: 14/12/2013, 10:15

... mySqlConnection.Open(); // create a SqlCommand object SqlCommand mySqlCommand = mySqlConnection.CreateCommand(); // run a PRINT statement mySqlCommand.CommandText = "PRINT 'This is ... " ;to "+ myEvent.CurrentState ); } To monitor an event, you must register your event handler method with that event. For example, the following statement registers the StateChangeHandler() ... "Introduction to Transact- SQL Programming." The following InfoMessageHandler() method is used to handle the InfoMessage event. Notice the use of the Errors collection to display the...

Ngày tải lên: 14/12/2013, 13:15

Ngày tải lên: 24/12/2013, 01:17

Ngày tải lên: 26/01/2014, 06:20

... SqlCommand object named myDeleteCommand that contains a call to the DeleteProduct() stored procedure and sets the DeleteCommand property of mySqlDataAdapter to myDeleteCommand: SqlCommand myDeleteCommand ... row to the database. The AddProduct4() stored procedure is run to add the new row to the Products table, and the RowState of myNewDataRow changes to Unchanged. Modifying a DataRow in a DataTable ... of the DataTable myDataTable.PrimaryKey = new DataColumn[ ] { myDataTable.Columns["ProductID"] }; // step 2: use the Find() method to locate the DataRow // in the DataTable...

Ngày tải lên: 14/12/2013, 13:15

Ngày tải lên: 21/01/2014, 04:20

... ĐẦU TƯ 20 00 20 01 20 02 2003 20 04 20 05 1 Tỉền gửi thanh tóan 490 2, 410 1,559 1,906 2, 150 2, 520 2 Tiền gửi có kỳ hạn 3,715 21 , 021 19,383 19 ,26 6 31,1 92 35,6 52 3 Cho vay 148 407 28 0 1 ,28 2 407 141 4 ... Bảng 2. 11 - KẾT QUẢ HỌAT ĐỘNG ĐẦU TƯ CỦA BẢO MINH LỢI NHUẬN (triệu đồng/năm) CHỈ TIÊU 20 00 20 01 20 02 2003 20 04 20 05 Lãi họat động đầu tư tài chính 6,598 27 ,144 24 , 129 43, 728 56,8 12 83,7 12 Lãi ... khóan 656 2, 099 1,988 2, 961 11,345 23 ,534 5 Liên doanh,cổ phần 1,198 920 729 8,483 10,555 16,813 6 Khác 391 28 7 190 9,830 1,163 5,0 52 TỔNG CỘNG 6,598 27 ,144 24 , 129 43, 728 56,8 12 83,7 12 7 7 sự...

Ngày tải lên: 27/03/2013, 16:25

... năng hàng nhằm mục tiêu phát triển kinh doanh an to n, hiệu quả của NHNo & PTNT VN. Nhiệm vụ: - Quản lý điều hành hoạt động tín dụng trong to n hệ thống NHNo & PTNT VN. - Dự thảo các ... xuất, chế biến, tiêu thụ, xuất khẩu (nội tệ, ngoại tệ) gắn nghiệp vụ tín dụng với thanh to n kể cả thanh to n quốc tế, vốn nội tệ, ngoại tệ; chuyển đổi tín dụng sản xuất với tín dụng lưu thông ... định. - Phối hợp với Trung tâm đào tạo tổ chức tập huấn, hướng dẫn nghiệp vụ uỷ thác đầu tư trong to n hệ thống NHNo & PTNT VN. - Thực hiện lưu trữ hồ sơ dự án (bản chụp) - Dự thảo các hợp...

Ngày tải lên: 24/10/2013, 10:15

... SqlCommand mySqlCommand = mySqlConnection.CreateCommand(); // set the CommandText property of the SqlCommand object to // the SELECT statement mySqlCommand.CommandText = "SELECT TOP ... in myDataTable.Rows) { foreach (DataColumn myDataColumn in myDataTable.Columns) { Console.WriteLine(myDataColumn + "= " + myDataRow[myDataColumn]); if (myDataColumn.ToString() ... Constitución 22 22 mySqlDataReader["CustomerID"] = ANTON mySqlDataReader["CompanyName"] = Antonio Moreno Taquería mySqlDataReader["ContactName"] = Antonio Moreno...

Ngày tải lên: 28/10/2013, 16:15

... SqlConnection objects is created. A maximum of 10 SqlConnection objects can be stored in the pool. If you attempt to open a new SqlConnection object and the pool is already full with currently used objects, ... SqlConnection object to connect to the // database, passing the connection string to the constructor SqlConnection mySqlConnection = Using a SqlConnection Object to Connect to a SQL Server Database ... you'll see how to open and close a connection. Opening and Closing a Database Connection Once you've created your Connection object and set its ConnectionString property to the appropriate...

Ngày tải lên: 07/11/2013, 10:15

Ngày tải lên: 28/11/2013, 10:17

... if we have three OUs — OU1, OU2, and OU3 — the policies linked to OU1 are applied to the users and computers listed in OU2. Policies in OU1 and OU2 are applied to OU3. If a setting is not configured ... most interesting nodes to us are Software Installation and Administrative Templates. Note GPOs are applied to user objects and computer objects only. They are not applied to security groups. ... available on local GPOs. For GPOs to fulfill their real promise, it is necessary to deploy Active Directory and start migrating all workstations and servers to Windows 20 00 or later. One of the key...

Ngày tải lên: 14/12/2013, 10:15

... servers to deploy all editions of Windows 20 00, Windows XP Professional, and Windows Server 20 03 (except Windows 20 00 Datacenter Server and Windows Server 20 03, Datacenter Edition.) Automated ... you to deliver applications to computers and users. For example, you can make applications A and B available to computers within a given domain and make applications C and D available to users ... ready to deliver a specific application to users: 1. Place the installation package on the network share. Make sure that it is accessible to the clients. 2. Start the Active Directory Users and...

Ngày tải lên: 14/12/2013, 10:15

... the DataTable myDataTable.PrimaryKey = new DataColumn[ ] { myDataTable.Columns["CustomerID"] }; // step 2: use the Find() method to locate the DataRow // in the DataTable ... a DataTable To modify a DataRow in a DataTable, you use the following steps: 1. Set the PrimaryKey property of your DataTable. You need to set this to find the DataRow in the next step. 2. ... changes to Modified after its CompanyName and Address are changed, and then to Unchanged after mySqlDataAdapter.Update() is called. where dataTableName is a string containing the name of the DataTable...

Ngày tải lên: 24/12/2013, 01:17

... myDataSet.Tables["Customers"] returns the Customers DataTable created in myDataSet in step 10, and stores the returned DataTable in myDataTable: DataTable myDataTable = myDataSet.Tables["Customers"]; ... myDataSet and "Customers" to the Fill() method: mySqlDataAdapter.Fill(myDataSet, "Customers"); The Fill() method creates a DataTable object named Customers in myDataSet and populates ... CustomerID = ANTON CompanyName = Antonio Moreno Taquería ContactName = Antonio Moreno Address = Mataderos 23 12 CustomerID = AROUT CompanyName = Around...

Ngày tải lên: 24/12/2013, 01:17

Ngày tải lên: 24/12/2013, 01:17