c# code to generate barcode ChAPTER 12 in Visual C#

Creation Denso QR Bar Code in Visual C# ChAPTER 12

746 ChAPTER 12
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Scan QR Code JIS X 0510 In Visual C#
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Working with Data Source Controls and Data-Bound Controls
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Sample of Visual Basic Code Partial Class Menu_Control Inherits System.Web.UI.Page Protected Sub Menu1_MenuItemClick(ByVal sender As Object, _ ByVal e As System.Web.UI.WebControls.MenuEventArgs) _ Handles Menu1.MenuItemClick Label1.Text = e.Item.ValuePath End Sub End Class Sample of C# Code public partial class Menu_Control : System.Web.UI.Page { protected void Menu1_MenuItemClick(object sender, MenuEventArgs e) { Label1.Text = e.Item.ValuePath; } }
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1 . What method should you call on a data-bound control when the data is ready to
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be read from the data source
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2. What method is used in a FormView to perform two-way data binding 3. What GUI object can provide a data source that allows you to connect middletier objects to data-bound controls
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1 . You should call the DataBind method. 2. The Bind method is used to perform two-way data binding. 3. The ObjectDataSource control can provide a data source that allows you to
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connect middle-tier objects to data-bound controls.
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Pr ActIcE
Using the gridview and Detailsview Controls
In this practice, you use the GridView and DetailsView data-bound controls together to create a master-detail page.
oN the CoMpaNIoN MedIa
If you encounter a problem completing an exercise, you can find the completed projects in the samples installed from this book s companion CD. For more information about the project files and other content on the CD, see Using the Companion Media in this book s Introduction.
Lesson 2: Working with Data-Bound Web Server Controls
ChAPTER 12
E xErcIsE Creating the Website, Adding Controls to the Page, and Configuring the
Controls
In this exercise, you create a new website and add the database and data source control. You then add the data-bound controls and configure them accordingly.
1. 2. 3.
Open Visual Studio and create a new website called UsingDataboundControls by using your preferred programming language. Add the northwnd.mdf file to your App_Data directory. You can copy the file from the samples installed from the CD. Open Default.aspx. Delete the default content on the page. Add a SqlDataSource control to the page from the Toolbox; name it sqlDatasourceReadList. This control will read data for display by the GridView control. In Design view of the Default.aspx page, click the smart tag in the upper-right corner of the SqlDataSource control to launch the Configure Data Source Wizard.
a. On the first page, set the connection to the northwnd.mdf file in the App_Data
directory and click Next.
b. When prompted, save the connection string as Connectionstringnorthwind,
and then click Next again.
On the Configure Select Statement page, select the Customers table from the Name list box. Select the CustomerID, CompanyName, ContactName, City, Country, and Phone fields. Click Next, and then click Finish to close the wizard.
Your SqlDataSource markup should look similar to the following.
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionStringNorthwind %>" SelectCommand="SELECT [CustomerID], [CompanyName], [ContactName], [City], [Country], [Phone] FROM [Customers]"> </asp:SqlDataSource>
Drag a GridView control onto the Default.aspx page. Using either Design or Source view, configure the GridView control as follows:
Set the DataSourceId to SqlDataSourceReadList, created previously. Set Enable Paging (AllowPaging property) to true. Set Enable Sorting (AllowSorting property) to true. Set AutoGenerateColumns to false. Configure the CustomerID, CompanyName, ContactName, City, Country, and Phone fields to be displayed. Add a CommandField to allow a user to select a row of data (you can do so in Design view by clicking Enable Selection).
748 ChAPTER 12
Working with Data Source Controls and Data-Bound Controls
Your markup should look similar to the following.
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="CustomerID" DataSourceID="SqlDataSource1" width="700px"> <Columns> <asp:CommandField ShowSelectButton="True" /> <asp:BoundField DataField="CustomerID" HeaderText="ID" ReadOnly="True" SortExpression="CustomerID" /> <asp:BoundField DataField="CompanyName" HeaderText="Company" SortExpression="CompanyName" /> <asp:BoundField DataField="ContactName" HeaderText="Contact" SortExpression="ContactName" /> <asp:BoundField DataField="City" HeaderText="City" SortExpression="City" /> <asp:BoundField DataField="Country" HeaderText="Country" SortExpression="Country" /> <asp:BoundField DataField="Phone" HeaderText="Phone" SortExpression="Phone" /> </Columns> </asp:GridView>
6. 7. 8.
If you want, select the GridView in Design view and click the AutoFormat link on the task pane (from the smart tag). Select Professional or another formatting option. Run the website; you should be able to page through data, sort data, and select a row. Next, add another SqlDataSource control to the Default.aspx page; name it sqlDatasourceUpdate. Configure this control as before, by using the Configure Data Source Wizard.
a. On the first page, select ConnectionStringNorthwind and click Next. b. The next step is to configure the SELECT statement to pick up the CustomerID
parameter from the selected row on the GridView control. On the Configure The Select Statement page, select the Customers table. This time, select each field in the table. Then click the Where button to launch the Add WHERE Clause dialog box. Set the column to CustomerID. Set the Operator to = (the equal sign). Set the Source to Control. Under Parameter Properties, set the Control ID to GridView1. Click the Add button, and then click OK to close the dialog box.
Click the Advanced button. In the Advanced Sql Generation Options dialog box, select the Generate INSERT, UPDATE, And DELETE Statements option. Click OK to close this dialog box. Click Next, and then click Finish to close the wizard.
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