In this session we will create presentation layer . First we need to add reference from both BLL and DLL layers . I added the web pages into presentation layer . One is for insert new student records and rest two is update and delete operations .
Here is the screen shot of the web page .
protected void btnYES_Click(object sender, EventArgs e)
{
Student student = new Student();
student.Student_Name = txtLName.Text;
student.Address = txtFName.Text;
student.Email = txtTitle.Text;
student.Mobile = txtAddress.Text;
StudentHandler studentHandler = new StudentHandler();
if (studentHandler.AddNewStudent(student) == true)
{
Label1.Text = "Student Record is Addedd";
}
}
Here is the HTML Code to retrieve the list of students ..
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ListOfStudent.aspx.cs" Inherits="ListOfStudent" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>
List of all the Students</h3>
<br />
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333" AutoGenerateColumns="False"
AutoGenerateEditButton="True" OnRowCancelingEdit="GridView1_RowCancelingEdit"
OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" BorderColor="Silver"
BorderStyle="Solid" BorderWidth="1px">
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#EFF3FB" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#2461BF" />
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText="StudentID">
<EditItemTemplate>
<asp:Label ID="lblID" runat="server" Text='<%# Eval("StudentID") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("StudentID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
<EditItemTemplate>
<asp:TextBox ID="txtName" runat="server" Text='<%# Bind("Student_Name") %>' Width="100px"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("Student_Name") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Address">
<EditItemTemplate>
<asp:TextBox ID="txtAddress" runat="server" Text='<%# Bind("Address") %>' Width="100px"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("Address") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="EmailID">
<EditItemTemplate>
<asp:TextBox ID="txtEmailID" runat="server" Text='<%# Bind("Email") %>' Width="100px"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Bind("Email") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Mobile">
<EditItemTemplate>
<asp:TextBox ID="txtMobile" runat="server" Text='<%# Bind("Mobile") %>' Width="100px"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label6" runat="server" Text='<%# Bind("Mobile") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:HyperLinkField Text="Delete" DataNavigateUrlFields="StudentID" DataNavigateUrlFormatString="~/StudentDelete.aspx?id={0}" />
</Columns>
</asp:GridView>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="Add New Student" OnClick="Button1_Click" /><br />
<br />
<asp:Label ID="lblResult" runat="server" Text=""></asp:Label></div>
</form>
</body>
</html>
Here is code for retrieving list of student .
public partial class ListOfStudent : System.Web.UI.Page
{
StudentHandler studentHandler = null;
protected void Page_Load(object sender, EventArgs e)
{
lblResult.Text = string.Empty;
studentHandler = new StudentHandler();
if (IsPostBack == false)
{
BindData();
}
}
private void BindData()
{
GridView1.DataSource = studentHandler.GetStudentList();
GridView1.DataBind();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
BindData();
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
BindData();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
Label lblID = GridView1.Rows[e.RowIndex].FindControl("lblID") as Label;
TextBox txtLastName = GridView1.Rows[e.RowIndex].FindControl("txtName") as TextBox;
TextBox txtFirstName = GridView1.Rows[e.RowIndex].FindControl("txtAddress") as TextBox;
TextBox txtTitle = GridView1.Rows[e.RowIndex].FindControl("txtEmailID") as TextBox;
TextBox txtAddress = GridView1.Rows[e.RowIndex].FindControl("txtMobile") as TextBox;
if (lblID != null && txtLastName != null && txtFirstName != null && txtTitle != null &&
txtAddress != null )
{
Student student = new Student();
student.StudentID = Convert.ToInt32(lblID.Text.Trim());
student.Student_Name = txtLastName.Text;
student.Address = txtFirstName.Text;
student.Email = txtTitle.Text;
student.Mobile = txtAddress.Text;
//Let us now update the database
if (studentHandler.UpdateStudent(student) == true)
{
lblResult.Text = "Record Updated Successfully";
}
else
{
lblResult.Text = "Failed to Update record";
}
//end the editing and bind with updated records.
GridView1.EditIndex = -1;
BindData();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
}
}
Here is the Html screen shot for delete web page ..
Here is the code behind..
public partial class StudentDelete : System.Web.UI.Page
{
StudentHandler studentHandler = null;
int studentID = 0;
protected void Page_Load(object sender, EventArgs e)
{
string id = Request.QueryString["id"] as string;
if (id == null)
{
Response.Redirect("Default.aspx");
}
try
{
studentID = Convert.ToInt32(id.Trim());
studentHandler = new StudentHandler();
Student student = studentHandler.GetStudentDetails(studentID);
lblStudentID.Text = student.StudentID.ToString();
lblName.Text = student.Student_Name;
lblAddress.Text = student.Address;
lblEmail.Text = student.Email;
lblMobile.Text = student.Mobile;
}
catch (Exception)
{
Response.Redirect("Default.aspx");
}
}
protected void btnNO_Click(object sender, EventArgs e)
{
Response.Redirect("Default.aspx");
}
protected void btnYES_Click(object sender, EventArgs e)
{
if (studentHandler.DeleteStudent(studentID) == true)
{
Response.Redirect("StudentDelete.aspx");
}
}
}
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