asp.net core barcode scanner

asp net core barcode scanner

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The CompareValidator control uses the ValueToCompare property to set a constant that is used to perform a comparison. For example, you might want to make sure that the user enters a birth date greater than 1900. You could do so by setting the ValueToCompare property to 1/1/1900. You would then set the Operator property of the control. This property defines how to perform the comparison and can be set to Equal, NotEqual, GreaterThan, GreaterThanEqual, LessThan, LessThanEqual, or DataTypeCheck. In the case of the birth date example, you would set this value to GreaterThanEqual. If you select DataTypeCheck, you can leave ValueToCompare blank, because ASP.NET simply verifies that the input is in the correct format. You can also use the ControlToCompare property to define another control that is used to perform the comparison. In this case, you are doing a comparison from one control to the next. For example, if you are asking a user to enter a range of dates, you would want the second defined date to be later than the first. You could use a CompareValidator control to perform this check. You would set its ControlToValidate property to the second date entry text box, and its ControlToCompare property to the first date entry text box. You would then set the Operator property to GreaterThan.

The capabilities of the Internet and the options for computing clients seem boundless, but there s probably a few capabilities you haven t thought of. Certainly you didn t think Microsoft would just sit still, did you A whole new world of functional ity is coming. Internet Protocol version 6 (IPv6) will change the way the world will communi cate yet again. Internet and network communications are currently based on one main network layer communications protocol, IP version 4 (IPv4). In the comput ing world, nothing is constant except innovation, and the Internet is no excep tion. IPv6 is the next communications protocol that will be available on the Internet, making every computer, both server and client, uniquely identifiable on

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You often need to ensure that a value entered by a user is within a predefined range of acceptable values. For example, you might want to create a webpage that shows sales for the current year, through a specific date. You would then want to verify that the user has entered a date value that is within the range of the current year. To do so, you can use the RangeValidator control. The RangeValidator control verifies that user input is within a specified range of values. This control has two very specific properties for managing the range of acceptable values: MinimumValue and MaximumValue. These properties work as their name indicates. The RangeValidator control also uses the Type property to determine the data type of the user s input. If you want the user to enter a date in the past from the current calendar year, you would set the Type property to Date. You would then set the MinimumValue and MaximumValue properties programmatically on the server to represent the current year. The following code shows an example of what this might look like.

Sample of Visual Basic Code Protected Sub Page_Load(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles Me.Load RangeValidatorSalesDate.MinimumValue = "1990"() RangeValidatorSalesDate.MaximumValue = _ DateTime.Now.Year.ToString() End Sub Sample of C# Code protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { RangeValidatorSalesDate.MinimumValue = "1990"; RangeValidatorSalesDate.MaximumValue = DateTime.Now.Year.ToString(); } }

This is a group of radio buttons:<BR> <INPUT type="radio" id=radio1 name=radiotest>Yes <BR> <INPUT type="radio" id=radio2 name=radiotest>No <BR>

5

After configuring the Web Deployment Project, right-click it in Solution Explorer and then click Build to generate the assembly or assemblies.

For the real world, know that you need to use Web Deployment Projects when you do not want to store the source code on the web server or when management requires signed assemblies. Because it is an add-on for Visual Studio 2010, you probably will not see any questions about it on the exam, however.

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