Store procedure select from two different table to a grid view - asp.net

Question

I'm looking for some help in a matter i can't solve it.
i created a stored procedure to select data from a table called "applicant"
and it work great
this is the code below:
USE [Josons]
GO
/****** Object: StoredProcedure [dbo].[PROC_GETALLAPPLICANTS] Script Date: 09/03/2013 10:50:58 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- Batch submitted through debugger: SQLQuery25.sql|7|0|C:\Users\supportadmin\AppData\Local\Temp\~vs29E1.sql
ALTER PROCEDURE [dbo].[PROC_GETALLAPPLICANTS]
AS
BEGIN
select ID,FIRSTNAME,LASTNAME,APPLYDATE from APPLICANT order by ID Asc
END
i added a new table called "AF", the two tables are related with a unique column:"applicant_id"
how to make the store procedure to select from 2 tables and show it in one grid view with the same order "ID Asc"
Edit:
aspx file:
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPages/MainMasterPage.master"
AutoEventWireup="true" CodeFile="HR.aspx.cs" Inherits="Pages_HR" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<div>
<asp:Button ID="btnLogout" CssClass="btnLogoutStyle" runat="server"
Text="Logout" onclick="btnLogout_Click" />
</div>
<div class="divgvDisplayAllApplicantsStyle">
<asp:GridView
ID="gvDisplayAllApplicants"
CssClass="gridviewstyle"
runat="server"
OnRowDataBound="gvDisplayAllApplicants_RowDataBound"
AllowPaging="true"
PageSize="10"
OnPageIndexChanging="gvDisplayAllApplicants_PageIndexChanging"
OnSelectedIndexChanged="gvDisplayAllApplicants_SelectedIndexChanged"
DataKeyNames="ID"
Width="940"
AutoGenerateColumns="false">
<Columns>
<asp:ButtonField CommandName="Select" Visible="false" />
<asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" />
<asp:TemplateField HeaderText="AF #">
<ItemTemplate>
<%# Eval("AF")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="First Name">
<ItemTemplate>
<%# Eval("FIRSTNAME")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Last Name">
<ItemTemplate>
<%# Eval("LASTNAME")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Apply Date">
<ItemTemplate>
<%# Eval("APPLYDATE")%>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</asp:Content>
and the aspx.cs file :
public partial class Pages_HR : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Session["DisplaySelectedApplicant"] = "DisplaySelectedApplicant";
try
{
if (Session["HR"].ToString() == "" && Request.QueryString["queryStringBackButton"].ToString() == null)
{
Session["DisplaySelectedApplicant"] = "";
Session["HR"] = "";
Response.Redirect("LoginPage.aspx");
}
}
catch (NullReferenceException)
{
Response.Redirect("LoginPage.aspx");
}
}
FillApplicantGridView();
}
#region METHODS
public void FillApplicantGridView()
{
string connstr = ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
using (SqlConnection sqlconnection = new SqlConnection(connstr))
{
sqlconnection.Open();
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "PROC_GETALLAPPLICANTS";
cmd.Connection = sqlconnection;
SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(cmd);
DataTable datatable = new DataTable();
sqlDataAdapter.Fill(datatable);
gvDisplayAllApplicants.DataSource = datatable;
gvDisplayAllApplicants.DataBind();
sqlconnection.Close();
}
}
}
protected void gvDisplayAllApplicants_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
// Get reference to button field in the gridview.
LinkButton _singleClickButton = (LinkButton)e.Row.Cells[0].Controls[0];
string _jsSingle = ClientScript.GetPostBackClientHyperlink(_singleClickButton, "Select$" + e.Row.RowIndex);
e.Row.Style["cursor"] = "hand";
e.Row.Attributes["onclick"] = _jsSingle;
e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#93A3B0'; this.style.color='White'; this.style.cursor='pointer'");
e.Row.Attributes.Add("onmouseout", String.Format("this.style.color='Black';this.style.backgroundColor='White';", gvDisplayAllApplicants.RowStyle.BackColor.ToKnownColor()));
}
}
}
protected void gvDisplayAllApplicants_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow selectedRow = gvDisplayAllApplicants.SelectedRow;
int rowIndex = selectedRow.RowIndex;
string Applicant_ID = gvDisplayAllApplicants.DataKeys[rowIndex].Values["ID"].ToString();
Response.Redirect("DisplaySelectedApplicant.aspx?ID=" + Applicant_ID);
}
protected override void Render(HtmlTextWriter writer)
{
foreach (GridViewRow row in gvDisplayAllApplicants.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
ClientScript.RegisterForEventValidation(((LinkButton)row.Cells[0].Controls[0]).UniqueID, "Select$" + row.RowIndex);
}
}
base.Render(writer);
}
protected void gvDisplayAllApplicants_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gvDisplayAllApplicants.PageIndex = e.NewPageIndex;
gvDisplayAllApplicants.ShowFooter = false;
gvDisplayAllApplicants.EditIndex = -1;
FillApplicantGridView();
}
#endregion
protected void btnLogout_Click(object sender, EventArgs e)
{
Response.Redirect("LoginPage.aspx");
}
}
Thanks,

Answer 1

If you want all records where both tables have application_id, then use INNER JOIN...
SELECT ap.ID ,
ap.FIRSTNAME ,
ap.LASTNAME ,
ap.APPLYDATE ,
AF.FieldNames
FROM APPLICANT ap
INNER JOIN AF ON ap.applicant_id = AF.applicant_id
ORDER BY ap.ID ASC
If you want to return all Applicants, even if there is no corresponding relation in AF, then use LEFT JOIN...
SELECT ap.ID ,
ap.FIRSTNAME ,
ap.LASTNAME ,
ap.APPLYDATE ,
AF.FieldNames
FROM APPLICANT ap
LEFT JOIN AF ON ap.applicant_id = AF.applicant_id
ORDER BY ap.ID ASC
Example of using ISNULL if no records...
SELECT ap.ID ,
ap.FIRSTNAME ,
ap.LASTNAME ,
ap.APPLYDATE ,
ISNULL(AF.AppFormCourseName, 'No Application as of yet')
FROM APPLICANT ap
LEFT JOIN AF ON ap.applicant_id = AF.applicant_id
ORDER BY ap.ID ASC
Consider calling the AF table something better too, I'm guessing it could be ApplicationForm?
See the explanation here for both Inner Join and Left Join.

Answer 2

ALTER PROCEDURE [dbo].[PROC_GETALLAPPLICANTS] AS
BEGIN
select a.ID,a.FIRSTNAME,a.LASTNAME,a.APPLYDATE,af.* from APPLICANT a join AF af on a.applicant_id = af.applicant_id order by a.ID Asc
END