using System;
using System.IO;
using System.Data;
using System.Data.Odbc;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Web.Mail;
using System.Net.Mail;

public partial class Gem : System.Web.UI.Page
{

    OdbcDataAdapter dadapter;
    DataSet dset;
    DataTable dt = new DataTable();
    DateTime dtDBDa;
    DateTime dtDBA;

    OdbcConnection myConnectionString =
        new OdbcConnection(ConfigurationManager.ConnectionStrings["ConnMySQL"].ConnectionString);

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
           
            try
            {
            myConnectionString.Open();
            GridViewBind();
            }
            catch (Exception ex)
            {
            throw ex;
            }
            finally
            {
            myConnectionString.Close();
            myConnectionString.Dispose();
            }
        }
    }



    public void GridViewBind()
    {
        sql1 = " SELECT DISTINCT ... ";
        dadapter = new OdbcDataAdapter(sql1, myConnectionString);
        dset = new DataSet();
        dset.Clear();
        dadapter.Fill(dset);
        GridView1.PageIndex = 0;
        GridView1.DataSource = dset.Tables[0];
        GridView1.DataBind();
        dadapter.Dispose();
        myConnectionString.Close();
        myConnectionString.Dispose();
    }


    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridViewBind();
        GridView1.DataSource = dset.Tables[0];
        GridView1.PageIndex = e.NewPageIndex;
        GridView1.DataBind();
    }

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Pager)
        {
            DropDownList ddl = (DropDownList)(e.Row.FindControl("ddlpages"));
            Label lblPageCount = (Label)e.Row.FindControl("lblPageCount");

            if (lblPageCount != null)
                lblPageCount.Text = GridView1.PageCount.ToString();

            for (int i = 1; i <= GridView1.PageCount; i++)
            {
                ddl.Items.Add(i.ToString());
            }

            ddl.SelectedIndex = GridView1.PageIndex;

            if (GridView1.PageIndex == 0)
            {
                ((ImageButton)e.Row.FindControl("ImageButton1")).Visible = false;
                ((ImageButton)e.Row.FindControl("ImageButton2")).Visible = false;
            }

            if (GridView1.PageIndex + 1 == GridView1.PageCount)
            {
                ((ImageButton)e.Row.FindControl("ImageButton3")).Visible = false;
                ((ImageButton)e.Row.FindControl("ImageButton4")).Visible = false;
            }
        }
    }


    protected void ddlPages_SelectedIndexChanged(Object sender, EventArgs e)
    {
        GridViewRow gvrPager = GridView1.BottomPagerRow;
        DropDownList ddlPages = (DropDownList)gvrPager.Cells[0].FindControl("ddlPages");

        GridViewBind();
        GridView1.DataSource = dset.Tables[0];
        GridView1.PageIndex = ddlPages.SelectedIndex;
        GridView1.DataBind();
    }


    protected void Paginate(object sender, CommandEventArgs e)
    {
        int intCurIndex = GridView1.PageIndex;

        switch (e.CommandArgument.ToString().ToLower())
        {
            case "First":
                GridView1.PageIndex = 0;
                break;
            case "Prev":
                GridView1.PageIndex = intCurIndex - 1;
                break;
            case "Next":
                GridView1.PageIndex = intCurIndex + 1;
                break;
            case "Last":
                GridView1.PageIndex = GridView1.PageCount - 1;
                break;
        }
        GridView1.DataBind();
    }


    protected void CheckBox1_CheckedChanged
                                (object sender, EventArgs e)
    {
        CheckBox chkTest = (CheckBox)sender;
        GridViewRow grdRow = (GridViewRow)chkTest.NamingContainer;

        TextBox pd = (TextBox)grdRow.FindControl
                                            ("pd");        

        if (chkTest.Checked)
        {
            pd.ReadOnly = false;
            pd.ForeColor = System.Drawing.Color.Red;
            pd.Font.Bold = true;            
            grdRow.BackColor = System.Drawing.Color.Yellow;
        }
        else
        {
            pd.ReadOnly = true;
            pd.ForeColor = System.Drawing.Color.Blue;
            pd.Font.Bold = false;            
            grdRow.BackColor = System.Drawing.Color.White;
        }

        btnUpdate.Enabled = false;
        foreach (GridViewRow row in GridView1.Rows)
        {
            CheckBox chk = (CheckBox)row.FindControl("chkSelect");
            if (chk.Checked)
                btnUpdate.Enabled = true;
        }
    }

    protected void btnUpdate_Click(object sender, EventArgs e)
    {
        OdbcCommand cmd = new OdbcCommand();
        int val = 0;

        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            CheckBox chkUpdate = (CheckBox)
               GridView1.Rows[i].Cells[0].FindControl("chkSelect");

            if (chkUpdate != null)
            {
                if (chkUpdate.Checked)
                {
                    strQ = ((TextBox)
                        GridView1.Rows[i].FindControl("pd")).Text;                    
                    strQ_Hidden = ((HiddenField)
                        GridView1.Rows[i].FindControl("pd_hidden")).Value;

                    int num1;
                    bool result1 = int.TryParse(strQ, out num1);

                    int num2;
                    bool result2 = int.TryParse(strQ_Hidden, out num2);

                    if (num1 <= num2)
                    {
                        int diff;
                        diff = (num2 - num1);
                        Cache["diffmycache"] = diff;

                        cmd.Parameters.Clear();
                        cmd.CommandText = "INSERT INTO .....";
                        cmd.Parameters.Add("param1", strQ);
                        cmd.Connection = myConnectionString;
                        myConnectionString.Open();
                        cmd.ExecuteNonQuery();
                        myConnectionString.Close();

                        cmd.Parameters.Clear();
                        cmd.CommandText = "UPDATE .... ";
                        cmd.CommandText = cmd.CommandText + "tbl_g ";
                        cmd.CommandText = cmd.CommandText + "SET Disp = 1 ";
                        cmd.CommandText = cmd.CommandText + "WHERE ....";
                        cmd.Parameters.Add("param3", OdbcType.Int, 10, strQ);
                        cmd.Connection = myConnectionString;
                        myConnectionString.Open();
                        cmd.ExecuteNonQuery();
                        myConnectionString.Close();


                    }
                    else
                    {
                        string myStringVariable = string.Empty;
                        myStringVariable = "Error!";
                        ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + myStringVariable + "');", true);
                        val = 1;
                    }
                }
            }

        }

        if (val == 0)
        {
            UncheckAll();
        }
    }


    private void UncheckAll()
    {
        foreach (GridViewRow row in GridView1.Rows)
        {
            CheckBox chkUncheck = (CheckBox)
                         row.FindControl("chkSelect");
            TextBox pd = (TextBox)
                           row.FindControl("pd");
            chkUncheck.Checked = false;
            pd.ReadOnly = true;
            pd.ForeColor = System.Drawing.Color.Blue;
            row.BackColor = System.Drawing.Color.White;
        }
    }


    protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
    {
        if (e.Exception != null)
        {
            string x = e.Exception.Message;
            ClientScript.RegisterClientScriptBlock(this.GetType(), "script", x);

        }
        else
        {

            string someScript = "";
            someScript = "<script language='javascript'>alert('Called from CodeBehind');</script>";
            ClientScript.RegisterClientScriptBlock(this.GetType(), "script", someScript);
            GridViewBind();

        }
    }


}