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3 Refresh Weather Info menu choice.
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In Design view, select cmsNotify in the component tray. In the context menu strip, double-click the
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4 weather data when the Refresh Weather Info menu choice in the context menu is selected.
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41 private void tsmiRefresh_Click(object sender, EventArgs e) 42 { 43 44 45 } this.tsmiRefresh.Enabled = false; this.UpdateWeather();
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Add the following code to the tsmiRefresh_Click event handler. This code initiates an update of the
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5 (You might need to click the Properties button at the top of the Properties window to see the list
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All of the weather forecast images need to be copied from your companion content to the same folder where the Weather Tracker application is located. You need to create a folder called Images and copy all of the *.gif weather image files into this folder.
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TO ADD WEATHER ICONS 1 Name the folder Images.
In the Solution Explorer, right-click the Weather Tracker project, select Add, and then New Folder.
2 the Images folder you just created. (The default location is \My Documents\Visual Studio 2005\
Projects\Weather Tracker\Weather Tracker\Images.)
Using Windows Explorer, copy the *.gif images (1.gif through 47.gif) from the companion content to
3 Existing Item dialog box appears.
In the Solution Explorer, right-click the Images folder, select Add, and then Existing Item. The Add
4 In the Files Of Type drop-down list, select Image Files. 5 can press Ctrl+A or you can use Shift+click. 6 project.
Make sure you are looking in the Images folder and select all of the .gif files. To select all the files, you
When all of the .gif files are selected, click the Add button to add the images to the Weather Tracker
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7 key, select the last .gif file.
In the Solution Explorer, select all of the .gif files. First, select 1.gif and then, while pressing the Shift
8 Copy Always, as shown in Figure 9-10. Make sure the Build Action property is set to Content.
With all the .gif files selected, in the Properties window, set the Copy To Output Directory property to
Testing Weather Tracker
Before running the Weather Tracker application, verify that you have successfully completed the following: You have an Internet connection. You have registered for the free weather Web service. You have specified your username and password in the application settings.
Figure 9-10 Weather icons added to the project
Now you will see if your application works. Press F5 to run Weather Tracker. If you have any build errors, review the errors in the Error List window and fix them. If necessary, you can review the completed application in the Complete folder. When you run the application, you should see your splash screen and then see a red NA in the notification area indicating that the current temperature has not been retrieved. Right-click the NA icon in the notification area and select Refresh Weather Info in the context menu. If the weather Web service is available, you should see the current temperature for the Redmond, Washington, area in the notification area. (Be patient, depending on the current Web service load you might have to wait a few moments.) When you double-click the temperature in the notification area, you should see detailed weather information as shown in Figure 9-11. Right-click the temperature to see the context menu. When finished, exit the application.
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Figure 9-11 The Weather Tracker application displaying weather data from a Web service
Working with the Options Dialog Box
Currently, the ZIP code is set to a particular value and that really isn t our intent. Therefore, you will use the Options dialog box and let the user enter the ZIP code they want to monitor. The ZIP code will be persisted to disk so that, whenever the user restarts the application, it will be restored to the last ZIP code they specified. Remembering the user s settings from one execution to another will provide the user with a better experience. You will also perform some checking to verify the ZIP code entered by the user. You will verify that the ZIP code is a number and within a specific range. You will use the error provider control to display appropriate text if the ZIP code is empty or not within range. The error provider control is used to display error information to the user. For example, if the user enters invalid information in a text box, an error icon is displayed next to the control indicating that an error has occurred. By default, the error icon is a small red circle with an exclamation point. When the user clicks the error icon, an error description is displayed to explain what is wrong to the user. You can change how the error is presented. For example, you can use a different error icon and you can make the error icon blink. Once a user addresses the error, you set the error description to an empty string to make the error icon disappear.
9: Build Your Own Weather Tracker Application Now! 199
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