LinkButton in GridView not picking correct value - asp.net

Question

I am using link button to display a pdf report for selected Report Id from Grid view. On page load I am binding the datasource with Gridview. By clicking the link button it fetches the correct report id from column 0 and displays the report. After sorting the grid the grid view shows the sorted data. Now if i click the link button it is not picking the changed value from column 0. instead it is picking the value before sorted.
Say: Column 0 has values 1, 2, 3, 4, 5 before sorting. If i click link button of Row 3 before sorting it is picking value 3 from column 0. After sorting it is 3,4,5,2,1. Now if i click link button of row 3 it is still picking value 3 instead of 5. Can you please help me.
Below is my code:
aspx:
CS:
protected void Page_Load(object sender, EventArgs e)
{
bindGrid();
}
protected void GvStockTakingReport_Sort(object sender, GridViewSortEventArgs e)
{
GvStockTakingReport.DataSource = null;
GvStockTakingReport.DataBind();
GvStockTakingReport.Dispose();
DataSet ds = StockTakingList.BindStocktakingReportGrid();
DataTable dtSortTable = ds.Tables[0];
if (dtSortTable != null)
{
DataView dv = new DataView(ds.Tables[0]);
dv.Sort = e.SortExpression + " " + getSortDirectionString();
//ViewState["sortExpression"] = e.SortExpression;
//Session["sortExpression"] = e.SortExpression;
GvStockTakingReport.DataSource = dv;
GvStockTakingReport.DataBind();
}
}
protected void PrintReport(object sender, CommandEventArgs e)
{
LinkButton lkButton = (LinkButton)sender;
GridViewRow item = (GridViewRow)lkButton.NamingContainer;
string Id = (item.FindControl("lblstk_id") as Label).Text;
//Getting value for Id
string Id1 = e.CommandArgument.ToString();
int rowIndex = Convert.ToInt32((string)e.CommandArgument);
//string Id1 = Convert.ToString(GvStockTakingReport.Rows[rowIndex].Cells[0].Text);
string Id2 = ((Label)(GvStockTakingReport.Rows[rowIndex].FindControl("lblstk_id"))).Text;
//Getting value for Id
string virtualPath = string.Format("~/{0}/{1}{2}", Portal.Business, Portal.Core.Profile.ReportsDirectory, "General/RPT_03002_StockTakinReport.rpt");
string physicalPath = Server.MapPath(virtualPath);
using (ReportDocument report = new ReportDocument())
{
report.Load(physicalPath);
Core.Security.CrystalReportLogOn(report, (SqlConnectionStringBuilder)Portal.Core.Profile.ConnectionStrings["MTServer"]);
report.SetParameterValue("#STK_Id", Id);
report.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Page.Response, true, "Stock Taking report");
}
}

Answer 1

the issue was whenever i click the link button the page load calls
bindgrid method which resets the gridview to original sorting before the printreport method invokes.
I have included the sorting logic in bindgrid method as well as below which resolved the issue.
public void bindGrid()
{
try
{
DataSet ds = StockTakingList.BindStocktakingReportGrid();
GvStockTakingReport.DataSource = ds;
GvStockTakingReport.DataBind();
//To make sure the grid remains with sorting order while pageload method invokes otherwise it will reset to original order
DataView dv = new DataView(ds.Tables[0]);
if (dv != null)
{
if (ViewState["sortExpression"] == null)
{
ViewState["sortExpression"] = "STK_Id"; //First time it will sort by STK_ID i.e on first time page loading
}
if (ViewState["sortDirection"] == null)
{
ViewState["sortDirection"] = "ASC";//First time it will sort ascending i.e on first time page loading
}
dv.Sort = ViewState["sortExpression"].ToString() + " " + ViewState["sortDirection"].ToString();
GvStockTakingReport.DataSource = dv;
GvStockTakingReport.DataBind();
}
}
catch (Exception ex)
{
error.Visible = true;
error.Text = ex.Message.ToString();
}
}