Tài liệu Creating a DataSet Object Using Visual Studio .NET docx

Creating a DataSet Object Using Visual Studio .NET In this section, you'll learn how to create a DataSet using Visual Studio .NET. N ote You'll find a completed VS .NET example project for this section in the DataSet directory. You can open this project in VS .NET by selecting File ➣ Open ➣ Project and opening the WindowsApplication4.csproj file. You can also follow along with the instructions in this section by continuing to modify the copy of the D ataReade r project you used in the previous section. If you're following along with these instructions, open your copy of the DataReader project you modified in the previous section , and open Form1.cs by double-clicking it in the Solution Explorer window. To create a DataSet object, you can perform either one of the following: • Drag a DataSet object from the Data tab of the Toolbox to your form, and add code to your form to fill it using the Fill() method of a DataAdapter object. • Click the Generate Dataset link at the bottom of the Properties window of your DataAdapter. You can see this link in Figure 10.13 . You'll use the second step, so go ahead and click the Generate Dataset link. The Generate Dataset dialog box is then displayed, as shown in Figure 10.14 . Figure 10.14: The Generate Dataset dialog box Click the OK button to continue. The new DataSet object named dataSet11 is added to the tray beneath your form, as shown in Figure 10.15 . Figure 10.15: The new DataSet object in the tray Your next step is to set the Form1_Load() method of your form as follows: private void Form1_Load(object sender, System.EventArgs e) { sqlConnection1.Open(); sqlDataAdapter1.Fill(dataSet11, "Products"); sqlConnection1.Close(); System.Data.DataTable myDataTable = dataSet11.Tables["Products"]; foreach (System.Data.DataRow myDataRow in myDataTable.Rows) { listView1.Items.Add(myDataRow["ProductID"].ToString()); listView1.Items.Add(myDataRow["ProductName"].ToString()); listView1.Items.Add(myDataRow["UnitPrice"].ToString()); } } N ote Remember, to view the code of your form, you select View ➣ Code. You then replace the Form1_Load() method with the previous code. You can then compile and run your form. Figure 10.16 shows the running form. Figure 10.16: The running form . Creating a DataSet Object Using Visual Studio .NET In this section, you'll learn how to create a DataSet using Visual Studio .NET. N ote You'll. Drag a DataSet object from the Data tab of the Toolbox to your form, and add code to your form to fill it using the Fill() method of a DataAdapter object.