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View_Courses.aspx.cs
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View_Courses.aspx.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using MySql.Data.MySqlClient;
namespace RMS
{
public partial class View_Courses : System.Web.UI.Page
{
string connectionString;
MySqlDataReader dr;
MySqlConnection con;
MySqlCommand cmd;
MySqlDataAdapter adap;
DataSet ds1;
protected void Page_Load(object sender, EventArgs e)
{
try
{
con = new MySqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["SqlConnection"].ConnectionString);
//connectionString = "Server=localhost;Database=noun_result_sys;Uid=root;Pwd=password;";
//con = new MySqlConnection(connectionString);
con.Open();
}
catch (Exception err)
{
lblError.Visible = true;
lblError.Text = "Error: " + err.Message;
}
con.Close();
Load_Courses();
}
protected void btnSearch_Click(object sender, EventArgs e)
{
try
{
con.Open();
Panel3.Visible = false;
MySqlCommand cmd = con.CreateCommand();
cmd.CommandText = "SELECT * FROM courses where course_id like " + "'" + txtSearch.Text + "%' or course_title like " + "'" + txtSearch.Text + "%' or course_level like " + "'" + txtSearch.Text + "%'";
adap = new MySqlDataAdapter(cmd);
ds1 = new DataSet();
adap.Fill(ds1, "rms");
GridView1.DataSource = ds1.Tables[0];
GridView1.DataBind();
PanelSearchGrid.Visible = true;
// Panel_Menu.Visible = true;
// PanelMenu_Grid.Visible = true;
// Panel1.Visible = false;
lblError.Visible = false;
}
catch (Exception err)
{
//Label1.Text = ("Error:{0}", err.Message);
lblError.Visible = true;
lblError.Text = "Error: " + err.Message;
}
con.Close();
}
protected void Load_Courses()
{
try
{
con.Open();
Panel3.Visible = false;
MySqlCommand cmd = con.CreateCommand();
cmd.CommandText = "SELECT * FROM courses where course_id like " + "'" + txtSearch.Text + "%' or course_title like " + "'" + txtSearch.Text + "%' or course_level like " + "'" + txtSearch.Text + "%'";
adap = new MySqlDataAdapter(cmd);
ds1 = new DataSet();
adap.Fill(ds1, "rms");
GridView1.DataSource = ds1.Tables[0];
GridView1.DataBind();
PanelSearchGrid.Visible = true;
// Panel_Menu.Visible = true;
// PanelMenu_Grid.Visible = true;
// Panel1.Visible = false;
lblError.Visible = false;
}
catch (Exception err)
{
//Label1.Text = ("Error:{0}", err.Message);
lblError.Visible = true;
lblError.Text = "Error: " + err.Message;
}
con.Close();
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
con.Open();
string id = GridView1.SelectedRow.Cells[0].Text;
txtCseID.Text = id;
string a = txtCseID.Text;
MySqlCommand cmd = con.CreateCommand();
cmd.CommandText = "Select * from courses where course_id = '" + a + "' ";
dr = cmd.ExecuteReader();
if (dr.Read())
{
txtCourseId.Text = Convert.ToString(dr[1]);
txtCourseTitle.Text = Convert.ToString(dr[2]);
DropDownListLevel.Text = Convert.ToString(dr[3]);
}
PanelSearchGrid.Visible = false;
Panel3.Visible = true;
Label1.Text = "Update " + txtCourseTitle.Text ;
btnCanc.Focus();
}
catch (Exception err)
{
lblError.Visible = true;
lblError.Text = "Error: " + err.Message;
}
con.Close();
}
protected void btnUpdate_Click(object sender, EventArgs e)
{
try
{
MySqlCommand cmd;
con.Open();
txtDateUpdated.Text = DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss");
if (txtCourseId.Text == "") { Label1.Visible = false; lblError.Visible = true; lblError.Text = "Mandatory Field is empty: Course ID"; }
else if (DropDownListLevel.Text == "") { Label1.Visible = false; lblError.Visible = true; lblError.Text = "Mandatory Field is empty: Course Level"; }
else
{
cmd = con.CreateCommand();
cmd.CommandText = "UPDATE courses SET course_id=@course_id, course_title=@course_title, course_level=@course_level, date_updated=@date_updated WHERE course_id = '" + txtCourseId.Text + "' ;";
cmd.Parameters.AddWithValue("@course_id", txtCourseId.Text);
cmd.Parameters.AddWithValue("@course_title", txtCourseTitle.Text);
cmd.Parameters.AddWithValue("@course_level", DropDownListLevel.Text);
cmd.Parameters.AddWithValue("@date_updated", txtDateUpdated.Text);
cmd.ExecuteNonQuery();
lblError.Visible = false;
Label1.Text = txtCourseTitle.Text + "'s record updated";
}
}
catch (Exception err)
{
lblError.Visible = true;
lblError.Text = "Error: " + err.Message;
}
con.Close();
}
protected void btnCanc_Click(object sender, EventArgs e)
{
PanelSearchGrid.Visible = true;
Panel3.Visible = false;
}
}
}