Question

I need to fill in the “SelectParameters” dynamically , but all I found on Google , was using fixed parameters.

<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="XX"
                            OnSelecting="SqlDataSource2_Selecting" SelectCommand="">
                            <SelectParameters>
                            </SelectParameters>
                        </asp:SqlDataSource>

Is there any solutions ?

I also tried to use the “OnSelecting” event , but I can’t assign value to parameters that are not present.

 protected void SqlDataSource2_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
    {
        string[] queryFields = new string[] { ... }; // some dynamic field depends on different table

        foreach (string s in queryFields)
        {
            e.Command.Parameters["@" + s].Value = "filter";
        }

    }

Answer 1

You can in code behind set the variables like this:

SqlDataSource1.SelectParameters.Add("parameterName", "parameterValue");

But be aware that you need the clear the parameters before adding them. Because otherwise you will end up with duplicates of parameters.