I have to display data from database using inner join with where clouse

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Hi every one here i have developed windows application using c# this is the end poin i have to reporting the data and diplay into datagriedview from two or more than 2 table

What I have tried:

cn.Open();
string getdata = "select tbl_vehicle_sale.deal_amnt,tbl_vehicle_sale.paid_amnt,tbl_vehicle_sale.due_amnt,tbl_vehicle_pur_Mast.veh_model,tbl_vehicle_pur_Mast.model_year from tbl_vehicle_sale inner join tbl_vehicle_pur_Mast on tbl_vehicle_sale.veh_no=tbl_vehicle_pur_Mast.veh_no"; cmd = new SqlCommand(getdata, cn);
dr = cmd.ExecuteReader();
while (dr.Read())
{

dataGridView1.DataSource = dr;
}

Posted 11-Feb-16 1:39am

Member 12270370

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ZurdoDev 11-Feb-16 7:47am

What is your question?

John C Rayan 11-Feb-16 8:02am

What is your issue?

Member 12270370 11-Feb-16 8:03am

access data using inner join from database and showing that accessed data to datagriedview

RDBurmon 11-Feb-16 8:06am

Are you getting any error? Have you tried to run the above code?

Dj@y 11-Feb-16 8:23am

remove while (dr.Read())
{

dataGridView1.DataSource = dr;
}
and put only

dataGridView1.DataSource = dr;

Richard Deeming 11-Feb-16 8:39am

That looks like the answer to me! You should post it as a solution. :)

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OriginalGriff · Answer 1 · 2016-02-11T02:41:00

If you want to display data in a DataGridView, don't use a DataReader - use a DataTable and a DataAdapter instead:

C#

string getdata = "SELECT s.deal_amnt, s.paid_amnt, m.due_amnt, m.veh_model, m.model_year FROM tbl_vehicle_sale s INNER JOIN tbl_vehicle_pur_Mast m ON s.veh_no = m.veh_no";
using (SqlDataAdapter da = new SqlDataAdapter(getdata, cn))
   {
   DataTable dt = new DataTable();
   da.Fill(dt);
   dataGridView1.DataSource = dt;
   }

If you need a WHERE clause just add it, and add a parameter:

C#

string getdata = &quot;SELECT s.deal_amnt, s.paid_amnt, m.due_amnt, m.veh_model, m.model_year FROM tbl_vehicle_sale s INNER JOIN tbl_vehicle_pur_Mast m ON s.veh_no = m.veh_no& WHERE s.deal_amnt = @AMNT;quot;;
using (SqlDataAdapter da = new SqlDataAdapter(getdata, cn))
   {
   da.SelectCommand.Parameters.AddWithValue("@AMNT", amountToFilterBy);
   DataTable dt = new DataTable();
   da.Fill(dt);
   dataGridView1.DataSource = dt;
   }

Musuda Alitsi · Answer 2 · 2016-02-11T02:44:00

This is a simple solution to your problem add this code where you want to load your grid, either on form load or button click,...

C#

            string sql = "select tbl_vehicle_sale.deal_amnt,tbl_vehicle_sale.paid_amnt,tbl_vehicle_sale.due_amnt,tbl_vehicle_pur_Mast.veh_model,
        tbl_vehicle_pur_Mast.model_year from tbl_vehicle_sale inner join tbl_vehicle_pur_Mast on tbl_vehicle_sale.veh_no=tbl_vehicle_pur_Mast.veh_no";

using (var connection = new SqlConnection(connectionString))
using (var command = new SqlCommand(sql, connection))
using (var adapter = new SqlDataAdapter(command))
{
    connection.Open();
    var myTable = new DataTable();
    adapter.Fill(myTable);
    dataGridView1.DataSource = myTable;
}

This will fill your grid, but i have noticed your SQL query is not very correct, are you sure that query runs well on sqlserver first before coming to C#?

I have to display data from database using inner join with where clouse

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