Question

i have 2 textbox that has a date values in my aspx file. I would like to access these 2 controls in my select statement using code behind but i am getting error like this:
‘Must declare the scalar variable “@txtStartClosingDate”
so what am i missing here in my code behind here? thanks

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            MainGridView.DataSource = GetData("select   GroupCategory, Count(Status1) as TotalCount from  [MasterProject] where Closing_Date >= @txtStartClosingDate and Closing_Date <= @txtEndClosingDate and Status1 is not null group by  GroupCategory");
            MainGridView.DataBind();


        }
    }

Here is one of the textbox that i am trying to reference:

<asp:TextBox ID="txtStartClosingDate" runat="server" CssClass="datepicker"></asp:TextBox>

Answer 1

Although I highly recommend against this (due to SQL injection vulnerabilities), I think what you’re trying to do is:

if (!IsPostBack)
{
    MainGridView.DataSource = GetData("select   GroupCategory, Count(Status1) as TotalCount from  [MasterProject] where Closing_Date >= '"+ txtStartClosingDate.Text +"' and Closing_Date <= '"+ txtEndClosingDate.Text +"' and Status1 is not null group by  GroupCategory");
    MainGridView.DataBind();
}

What does the GetData method look like? Does it take any SQL Parameters?