Web Forms :: Dynamically Filter The Parameter's Values On A Popup Window Based On Other Parameters Selection

Apr 30, 2010

I have a pop up window which contains a listbox. The items on the listbox should be filtered when it is opened based on the other parameters on the parent page. I am using session to pass the values from a page to another.

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May 28, 2010

I'm new to web dev and c# so please bare with me. I am trying to create a dynamic gridview in a web form for users to to answer questions with (code below).

The dificulty im having is that i am nesting a dropdwonlist in the gridview and want to be able to dynamically set the list values based on parameters (of the row they are on). These values are in the main dataset for the gridview as each row represents a questionid and question text and then a ddl for the criteria...

I just don't know how to set the values for the dropdown all the code so far is below... just need to be able to populate the dropdowns with the relevant values.

I have created a stored proc to return the different criteria based on the questionid and questionGroupid which is the dataset that populates the other fields in the gridview: dbo.usp_QuestionCriteria @QuestionGroupId, @QuestionId

I have added this as a tableadapter called criteriaTableAdapter in a xsd file as well using the wizard... not sure if this is the right option though or just use the same method as i have for the other stored procedure as in the code below:


]using System;
using System.Data;
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.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
protected void Page_Load(object sender, EventArgs e)
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Sql"].ConnectionString);
SqlCommand com = new SqlCommand("usp_QuestionGroupDS", con);
com.CommandType = CommandType.StoredProcedure;
SqlDataAdapter ada = new SqlDataAdapter(com);
DataSet ds = new DataSet();
for (int i = 0; i < ds.Tables.Count; i++)
if (ds.Tables[i].Rows.Count > 0)
GridView gvDynamicQuestion = new GridView();
gvDynamicQuestion.Width = Unit.Pixel(700);
gvDynamicQuestion.BorderWidth = Unit.Pixel(0);
gvDynamicQuestion.Caption = "<div id="nifty" class="QuestionGroup"> <b class="rtop"><b class="r1"></b><b class="r2"></b><b class="r3"></b><b class="r4"></b></b>" + ds.Tables[i].Rows[0]["Category"].ToString() + " Questions<b class="rbottom"><b
class="r4"></b><b class="r3"></b><b class="r2"></b><b class="r1"></b></b></div>";
gvDynamicQuestion.AutoGenerateColumns = false;
gvDynamicQuestion.ShowFooter = true;
TemplateField tf = null;
tf = new TemplateField();
tf.HeaderTemplate = new DynamicGridViewTextTemplate("QuestionId", DataControlRowType.Header);
tf.ItemTemplate = new DynamicGridViewTextTemplate("QuestionId", DataControlRowType.DataRow);
tf.FooterTemplate = new DynamicGridViewTextTemplate(DataControlRowType.Footer, ds.Tables[i].Rows.Count);
tf = new TemplateField();
tf.HeaderTemplate = new DynamicGridViewTextTemplate("Question", DataControlRowType.Header);
tf.ItemTemplate = new DynamicGridViewTextTemplate("Question", DataControlRowType.DataRow);
tf = new TemplateField();
tf.HeaderText = "Criteria";
tf.HeaderTemplate = new DynamicGridViewTextTemplate("Criteria", DataControlRowType.Header);
tf.ItemTemplate = new DynamicGridViewDDLTemplate();
////tf = new TemplateField();
////tf.HeaderText = "Criteria";
////tf.ItemTemplate = new DynamicGridViewDDLTemplate();
gvDynamicQuestion.DataSource = ds.Tables[i];
protected void DynamicGrid_RowDataBound(object sender, GridViewRowEventArgs e)
if (e.Row.RowType == DataControlRowType.Footer)
public class DynamicGridViewTextTemplate : ITemplate
string _ColName;
DataControlRowType _rowType;
int _Count;
public DynamicGridViewTextTemplate(string ColName, DataControlRowType RowType)
_ColName = ColName;
_rowType = RowType;
public DynamicGridViewTextTemplate(DataControlRowType RowType, int QuestionCount)
_rowType = RowType;
_Count = QuestionCount;
public void InstantiateIn(System.Web.UI.Control container)
switch (_rowType)
case DataControlRowType.Header:
Literal lc = new Literal();
lc.Text = "<b>" + _ColName + "</b>";
case DataControlRowType.DataRow:
Label lbl = new Label();
lbl.DataBinding += new EventHandler(this.lbl_DataBind);
case DataControlRowType.Footer:
Literal flc = new Literal();
flc.Text = "<b>Total No of Questions:" + _Count + "</b>";
private void lbl_DataBind(Object sender, EventArgs e)
Label lbl = (Label)sender;
GridViewRow row = (GridViewRow)lbl.NamingContainer;
lbl.Text =DataBinder.Eval(row.DataItem, _ColName).ToString();
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// Implementation of ITemplate
public void InstantiateIn(System.Web.UI.Control container)
// Create a DDL
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//Attach method to delegate
ddl.DataBinding += new System.EventHandler(this.ddl_DataBind);
//Method that responds to the DataBinding event
private void ddl_DataBind(object sender, System.EventArgs e)
//DropDownList ddl = (DropDownList)sender;
//DataGridItem container = (DataGridItem)ddl.NamingContainer;
//ddl.Data.Checked = [Data binding expression];


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[Code] ...

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