i am enabling the user using my asp.net application to add data into a sql server 2008 database.
what is the best way to insert data and be able to validate things like empty fields, integers vs strings?
i am currently using formview to insert the data. how do i validate user input?
Use a validation jQuery plugin for front end validation.
This is the one I use a lot. http://bassistance.de/jquery-plugins/jquery-plugin-validation/
Then in c# create a partial class of your model and use DataAnnotations to do some more in depth validation.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel;
namespace DataRepository
{
[MetadataType(typeof(Company_validation))]
public partial class Company
{
}
public class Company_validation
{
[Required]
[DisplayName("Company name")]
public string Name { get; set; }
[Required]
[DisplayName("Address")]
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
[Required]
public string Suburb { get; set; }
[Required]
public int Postcode { get; set; }
[Required]
public string State { get; set; }
}
}
So from here you can pretty much do any validation you would ever need.
Here are two examples of RequiredFieldValidators we used in a project once.
The RegularExpressions validator is the one you want to check against string vs int etc or to validate phone number, postcode or email;
<asp:RequiredFieldValidator ID="reqValTxtAppRef" runat="server" ErrorMessage="Please enter your application reference number or <a href='ChooseYourHealthCover.aspx'>click here</a> to begin a new application <br/>"
ControlToValidate="txtAppRef" Display="Dynamic" ValidationGroup="vgRetrieveApp"
SetFocusOnError="true" CssClass="error" Font-Bold="true" cau EnableClientScript="False" />
<asp:RegularExpressionValidator ID="regexpValTxtAppRef" runat="server" ControlToValidate="txtAppRef" ErrorMessage="This is not a valid application reference number. Please enter it again or <a href='ChooseYourHealthCover.aspx'>click here</a> to begin a new application <br>" ValidationExpression="(HQ|HA|hq|ha)\d{8}" ValidationGroup="vgRetrieveApp" Display="Dynamic" CssClass="error" Font-Bold="true" EnableClientScript="False" />
I'd get comfortable with asp.net validators first... After that, there are some really nice ones with jquery, etc.
Here is a great place to get an overview, as well as see them in action. It has a sandbox area, where you can test it out too. http://www.w3schools.com/aspnet/aspnet_refvalidationcontrols.asp
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