c# barcode maker a. First, add parameters for company, contact, city, and phone. Set the source for each in C#.NET

Creation Quick Response Code in C#.NET a. First, add parameters for company, contact, city, and phone. Set the source for each

a. First, add parameters for company, contact, city, and phone. Set the source for each
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of these parameters to a Control, and select the ControlID of the corresponding TextBox. This will bind the TextBox controls to an insert query.
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b. Next, use the Query Builder button to define an insert query for the Suppliers table.
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Your markup for the SqlDataSource control should look similar to the following.
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<asp:SqlDataSource ID="SqlDataSourceNwd" runat="server" ConnectionString="<%$ ConnectionStrings:NwdConnectionString %>" SelectCommand="SELECT [SupplierID], [CompanyName], [ContactName], [City], [Phone] FROM [Suppliers] ORDER BY [CompanyName]" InsertCommand="INSERT INTO Suppliers(CompanyName, ContactName, City, Phone) VALUES (@company, @contact, @city, @phone)"> <InsertParameters> <asp:ControlParameter ControlID="TextBoxCompany" Name="company" PropertyName="Text" /> <asp:ControlParameter ControlID="TextBoxContact" Name="contact" PropertyName="Text" /> <asp:ControlParameter ControlID="TextBoxCity" Name="city" PropertyName="Text" /> <asp:ControlParameter ControlID="TextBoxPhone" Name="phone" PropertyName="Text" /> </InsertParameters> </asp:SqlDataSource>
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ChAPTER 9
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Working with Client-Side Scripting, AJAX, and jQuery
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Next, add a Click event to the ButtonSave button defined in step 11 (onclick="ButtonSave_ Click"). This Click event will execute the insert query defined in step 12 and result in a new row being added to the Suppliers table in the database. At the end of this event, rebind the GridView control. The following code shows an example.
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Sample of Visual Basic Code Protected Sub ButtonSave_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) SqlDataSourceNwd.Insert() GridView1.DataBind() End Sub Sample of C# Code protected void ButtonSave_Click(object sender, EventArgs e) { SqlDataSourceNwd.Insert(); GridView1.DataBind(); }
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Note that this code is very basic. It does not validate the data entered by the user and is therefore prone to error. It is simply an example.
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Run the application and enter a row in the table. Notice that the entire page refreshes. Add behavior to the page so that the Add button triggers a partial-page update to the GridView control. To do so, add a trigger to the UpdatePanel control and connect the trigger to the ButtonEnter control. The following markup shows an example.
<asp:UpdatePanel ID="UpdatePanelVendors" runat="server"> <Triggers> <asp:AsyncPostBackTrigger ControlID="ButtonSave" EventName="Click" /> </Triggers> <ContentTemplate> <asp:GridView ...
Run the application again and notice that now only GridView updates when a new row is added.
E xErcIsE 2 Adding a Progress Indicator
In this exercise, you add functionality that provides a notice to the user when the page is being partially updated on the server.
1. 2.
Continue editing the project you created in the previous exercise. Alternatively, you can open the completed Lesson 1, Exercise 1 project in the sample files installed from the CD. Open Default.aspx in Source view. Add an UpdateProgress control to the UpdatePanel. Add the control to the bottom of the panel just inside the ContentTemplate element.
Lesson 1: Creating AJAX-Enabled Web Forms
ChAPTER 9
Add text inside the ProgressTemplate elements of the UpdateProgress control to notify the user that processing is happening on the server. The following shows a sample markup.
<asp:UpdateProgress ID="UpdateProgress1" runat="server"> <ProgressTemplate> <div style="margin-top: 20px; font-size: larger; color: Green"> Processing, please wait ... </div> </ProgressTemplate> </asp:UpdateProgress>
The processing happens pretty fast. Therefore, add a line of code to the end of the ButtonSave_Click event to pause the server-side processing. You can simply put the thread to sleep for a few seconds. The following code shows an example.
Sample of Visual Basic code System.Threading.Thread.Sleep(2000) Sample of C# code System.Threading.Thread.Sleep(2000);
5. 6.
Run the application and notice that the notification is shown to the user when you enter a new record in the GridView control. You might have noticed that when you add a new record, the TextBox controls do not clear because the full page is not being updated. To fix this, add another UpdatePanel control to your page and nest the TextBox controls and the ButtonSave inside it. Inside the ButtonSave_Click event, set the Text property of each TextBox control to "".
E xErcIsE 3 Using the Timer Control
In this exercise, you add functionality that uses the Timer control. You will add an area on the page that displays a series of graphics files by using a timed interval.
1. 2. 3.
Continue editing the project you created in the previous exercise. Alternatively, you can open the completed Lesson 1, Exercise 2 project in the sample files installed from the CD. Open the Default.aspx page in Source view. Add an UpdatePanel control to the right of the supplier data entry form. (You can do so by creating a table with two columns.) This control will work like a rotating advertisement. It will periodically update and show a new image from the server. Inside the UpdatePanel control s ContentTemplate element, add a label with the text Advertisement. Under this text, add an image control. You can add a couple of your own images to your project (or copy some from the sample files installed from the CD).
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