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  1. POI am using asp.net MVC 1.0 and want to apply some jquery or javascript in below code?
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    <pre><code> &lt;%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage&lt;ens.ContactPerson&gt;" %&gt; &lt;asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server"&gt; Edit &lt;/asp:Content&gt; &lt;asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"&gt; &lt;h2&gt;Edit&lt;/h2&gt; &lt;%if (System.Web.HttpContext.Current.User.Identity.IsAuthenticated) { %&gt; &lt;%= Html.ValidationSummary("Edit was unsuccessful . Please correct the errors and try again.")%&gt; &lt;% using (Html.BeginForm()) {%&gt; &lt;fieldset&gt; &lt;legend&gt;Fields&lt;/legend&gt; &lt;p&gt; &lt;%= Html.Hidden("Id", Model.Id)%&gt; &lt;%= Html.ValidationMessage("Id", "*")%&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="FirstName"&gt;FirstName:&lt;/label&gt; &lt;%= Html.TextBox("FirstName", Model.FirstName)%&gt; &lt;%= Html.ValidationMessage("FirstName", "*")%&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="MiddleName"&gt;MiddleName:&lt;/label&gt; &lt;%= Html.TextBox("MiddleName", Model.MiddleName)%&gt; &lt;%= Html.ValidationMessage("MiddleName", "*")%&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="LastName"&gt;LastName:&lt;/label&gt; &lt;%= Html.TextBox("LastName", Model.LastName)%&gt; &lt;%= Html.ValidationMessage("LastName", "*")%&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="DateOfBirth"&gt;DateOfBirth:&lt;/label&gt; &lt;%= Html.TextBox("DateOfBirth", String.Format("{0:g}", Model.DateOfBirth))%&gt; &lt;%= Html.ValidationMessage("DateOfBirth", "*")%&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="ContactPersonType"&gt;ContactPersonType:&lt;/label&gt; &lt;%= Html.DropDownList("ContactPersonType")%&gt; &lt;%= Html.ValidationMessage("ContactPersonType", "*")%&gt; &lt;/p&gt; &lt;p&gt; &lt;input type="submit" value="Save" /&gt; &lt;/p&gt; &lt;/fieldset&gt; &lt;% } %&gt; &lt;div&gt; &lt;%=Html.ActionLink("Back to List", "All")%&gt; &lt;/div&gt; &lt;%} %&gt; &lt;/asp:Content&gt; </code></pre> <p>can i apply some javascript or jquery here such that after click on submit button, it must checks for the values are valid , if can do so.</p> <p>pls give code for the validation of last name field...this should not be empty.</p> <p>i tried with this function but it dindt work....</p> <pre><code> protected void ValidateContact(ens.ContactPerson contactToValidate) { if (contactToValidate.FirstName.Trim().Length == 0) ModelState.AddModelError("FirstName", "First name is required."); if (contactToValidate.LastName.Trim().Length == 0) ModelState.AddModelError("LastName", "Last name is required."); if (contactToValidate.MiddleName.Trim().Length == 0) ModelState.AddModelError("MiddleName", "Invalid phone number."); if (contactToValidate.DateOfBirth.ToString().Trim().Length == 0) ModelState.AddModelError("Email", "Invalid email address."); } </code></pre>
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