Choose the database objects or tables that you want in your model, provide a meaningful model namespace and click Finish. Step 3 Look at the name of the entities in the image above. Once you click add, you will see that many files have been added. When we want to create and add a new record, the Create scaffold template is selected and so on. In the preceding two classes, you will see that none of the fields are marked Required. We got for the Course field “The Course_Id field is required” but here we are not assigning any Id, we are assigning Course Name. In the Home look for the Http Post Edit action method. We don't want our entities to be called tbl Course and tbl Student. Step 4 The next step is to add a controller and for that right-click on the Controllers folder then select Add then select Controller. Select the template “MVC Controller with read/write actions and views using Entity Framework”Select Student as the model class. Like Home Controller, Index, Details, Create, Edit and Delete.cshtml files. So, if we click on the create link, we will get this layout and this layout is nothing but a Create scaffold template. Let's see what happens if we don't insert any data into the fields and click the create button. So, to prevent the fields from having blank records we can make all the properties required. So, let's see how to change this validation message. In the Edit view, we don't want the Student Name to be editable. We got a validation error in the Name field because this Student Name field is a read-only field but we are not posting the value back to the server and when we click the Save button this field becomes null. Look at how the Edit post action method is implemented. To delete a record click the Delete link in the Index page. So, in this article we saw how to Insert, Update and Delete records and with that we have also seen how to prevent un-intended updates. In this article we will learn about client-side validation that is done using Java Script. In the preceding syntax function is the keyword provided by the Java Script to declare a function and the Vildate Data() is the function name, now write the code inside the function as in the following.Client side validation Validation done in the browser before sending the form data to the server using Java Script, j Query and VBScript is called client-side validation. Let us first create the web application with two web pages We are adding two web pages because our requirement is, in the first web page there is form data to be filled in by the user and only after validating the form data, the form will be redirected to the next page. Net Question Answer site, specially started to allow visitors of this site ask their doubts and queries. Just click the Ask Now button and ask your question now.to avoid any erroneous data to be inserted into the database. So let us learn some basics because I have written this article only focusing on beginners and students. Example I hope you now understand the basics of validation in Java Script, now let us create the one sample web application that demonstrates how to do validation.The validation control classes are inherited from the Base Validator class hence they inherit its properties and methods.
Right-click on the Models folder then seelct Add then select New Item.In this article we use the In the code above I have taken the ASP.Net control's values in variables so it cannot be repeated again and again in our function the email Exp variable holds the pattern of the email id in the form of a regular expression.The following example describes a form to be filled up by all the students of a school, divided into four houses, for electing the school president.Here, we use the validation controls to validate the user input.
Now add the condition to ensure that all controls have a value, if the values are not entered in the form control then it will show a message.