DataTable in ASP.Net Session

I have to show users entered parameters in Asp.net Gridview example some values from dropdownlist textboxes and startDate EndDate etc . I am getting these values from user and add them to a Temporary dataTable . i am adding each row to DatTable on every add button call it goes fine for first time means for first row when i try to enter another row on Add button Click i overWrites on previous row and shows me only one row.

Here is my code :

BusinessLayer.LaunchPortfolioTest objAddParametersToDataTable = new BusinessLayer.LaunchPortfolioTest();
DataTable TempTable;

if (Session["TempTable"] == null)
{
    TempTable = objAddParametersToDataTable.TempTableView();
    Session["IDcolumn"] = 1;
}
else
{
    Session["IDcolumn"] = Convert.ToInt16(Session["IDcolumn"]) + 1;
    TempTable = (DataTable)Session["TempTable"];
}
int ID = Convert.ToInt16(Session["IDcolumn"]);
string nome = Utilities.formatShortDate(Convert.ToDateTime(txtEndDate.Text.ToString()));
string priority = drpPriority.SelectedValue.ToString();
string portfolioCode = drpPortfolioCode.SelectedValue.ToString();
DateTime startDate = Convert.ToDateTime(txtStartDate.Text.ToString());
DateTime endDate = Convert.ToDateTime(txtEndDate.Text.ToString());
string currency = drpCalculationCurrency.SelectedValue.ToString();
string author = lblLoginnedUser.Text.ToString();
TimeSpan Difference = endDate.Date.AddDays(1) - startDate.Date;
//Adding Parameters to DataTable:
objAddParametersToDataTable.AddRow(ID, priority, author, nome, portfolioCode, Convert.ToString(startDate), Convert.ToString(endDate), currency, TempTable);

grdViewReport.DataSource = TempTable;
grdViewReport.DataBind();

Session.Add("TempTable", objAddParametersToDataTable.TempTableView());

TempTableView method:

public DataTable TempTableView()
{
    DataTable TempAnalysisTable = new DataTable();
    DataColumn identity = new DataColumn("IDcolumn", typeof(int));
    TempAnalysisTable.Columns.Add(identity);
    TempAnalysisTable.Columns.Add("Priority", typeof(string));
    TempAnalysisTable.Columns.Add("Author", typeof(string));
    TempAnalysisTable.Columns.Add("Name", typeof(string));
    TempAnalysisTable.Columns.Add("PortfolioCode", typeof(string));
    TempAnalysisTable.Columns.Add("StartDate", typeof(string));
    TempAnalysisTable.Columns.Add("EndDate", typeof(string));
    TempAnalysisTable.Columns.Add("Currency", typeof(string));        
    return TempAnalysisTable;
}

Add Method Code IS here:

public void AddRow(int id,string priority, string author, string name, string portfolioCode, string startDate, string endDate, string currency, DataTable TempAnalysisTable)
{
    TempAnalysisTable.Rows.Add(new object[] {id, priority, author, name, portfolioCode, startDate, endDate, currency });
}

Answers:

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Method 1

Am not sure for you scenario. But here is the thing for adding grid view dynamically without using database.

 protected void Page_Load(object sender, EventArgs e)
{
    if (IsPostBack == false)
    {
        DataTable date = new DataTable();
        date.Columns.Add("Column !", typeof(string));
        date.Columns.Add("Column 2", typeof(string));
        Session["dte"] = date;
     }
 }

protected void addbutton_Click(object sender, ImageClickEventArgs e)
{
    DataTable date = (DataTable)Session["dte"];
    DataRow dr = date.NewRow();
    dr["Column 1"] = TextBox1.Text.Trim();// Your Values
    dr["Column 2"] = TextBox2.Text.Trim();// Your Values
    date.Rows.Add(dr);
    GridView1.DataSource = date;
    GridView1.DataBind();
}

It may help you to over come this hurdle. Please let me know your further queries in this case.

Method 2

You need to get the previous datatable from session and read it and put rows in it. This should be done at addrow AddButton_Click event.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0