SqlConnection con=new SqlConnection("database=cvp;server=.;integrated security=true;");

SqlCommand cmd;

SqlDataAdapter da;

DataSet ds;

string query,tablename;

protected void Button3_Click(object sender, EventArgs e)

{

//code for ok button

string slct = "Select * ";

string tblcol = DropDownList1.SelectedItem.ToString();

string frm = " From ";

string whr = " where ";

string sign = DropDownList2.SelectedItem.ToString();

string val = " " +TextBox2.Text;

if (tblcol == "EmployeeId")

{

tablename="Employee";

}

else if (tblcol == "ProductId")

{

tablename="Product";

}

else if(tblcol=="CustomerId")

{

tablename = "Customer";

}

query = slct + frm + tablename + whr + tblcol + sign + val;

ListBox1.Items.Add(query);

}

protected void Button4_Click(object sender, EventArgs e)

{

//code for submit button

cmd = new SqlCommand();

string ss = ListBox1.SelectedItem.ToString();

if (ss == null)

ss = query;

cmd.CommandText = ss;

cmd.Connection = con;

SqlDataReader dr;

con.Open();

dr=cmd.ExecuteReader();

if (dr.HasRows)

{

//while (dr.Read())

//{

// Response.Write(dr.GetSqlInt32(0)+" ");

// Response.Write(dr.GetString(1)+" ");

// Response.Write(dr.GetSqlInt32(2) + "

");

//}

DataTable dt = new DataTable(tablename);

DataColumn dc1 = new DataColumn(dr.GetName(0));

DataColumn dc2 = new DataColumn(dr.GetName(1));

DataColumn dc3 = new DataColumn(dr.GetName(2));

dt.Columns.Add(dc1);

dt.Columns.Add(dc2);

dt.Columns.Add(dc3);

while (dr.Read())

{

DataRow dr1 = dt.NewRow();

dr1[0] = dr.GetSqlInt32(0);

dr1[1] = dr.GetString(1);

dr1[2] = dr.GetSqlInt32(2);

dt.Rows.Add(dr1);

}

GridView1.DataSource = dt;

GridView1.DataBind();

}

con.Close();

}