I have a dropdown list on my form which should filter out or display my tag cloud for an entire project or for a specific iteration. It's strange though, because I get different results when I select certain iterations from the list. Sometimes the ascx control doesn't display at all, sometimes it displays a tag cloud, but it's incorrect, and sometimes it displays the right one. I have no idea why this is happening... Thanks in advance for your help!
displaycloud.aspx:
<asp:DropDownList ID="filteroptions" runat="server" onselectedindexchanged="filteroptions_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>
<asp:UpdatePanel ID="UpdateIteration" runat="server">
<ContentTemplate>
<TagCloud:TagCloudControl ID="TagCloudControl1" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="filteroptions" />
</Triggers>
</asp:UpdatePanel>
displaycloud.aspx.cs:
protected void Page_Load(object sender, EventArgs e)
{
proj_name = Request.QueryString["project"].ToString();
proj_id = Request.QueryString["id"].ToString();
SqlConnection conn = new SqlConnection(GetConnectionString());
conn.Open();
cmd = new SqlCommand("Select CONVERT(VARCHAR(10), StartDate, 103) + ' - ' + CONVERT(VARCHAR(10), EndDate, 103) AS Iteration, ProjectIterationID FROM Iterations WHERE ProjectID = '" + proj_id + "'", conn);
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);;
conn.Close();
if (!Page.IsPostBack)
{
filteroptions.DataSource = ds;
filteroptions.DataTextField = "Iteration";
filteroptions.DataValueField = "ProjectIterationID";
filteroptions.DataBind();
filteroptions.Items.Insert(0, new System.Web.UI.WebControls.ListItem("Entire Project", "0"));
}
}
protected void filteroptions_SelectedIndexChanged(object sender, EventArgs e)
{
string selected_iteration = filteroptions.SelectedValue;
Session["iteration"] = selected_iteration;
}
ASCX CS FILE:
protected void Page_Load(object sender, EventArgs e)
{
proj_name = Request.QueryString["project"].ToString();
proj_id = Request.QueryString["id"].ToString();
if (String.IsNullOrEmpty((string)Session["iteration"]))
{
iteration = "0";
}
else
{
iteration = (string)Session["iteration"];
}
BindTagCloud();
}
private void BindTagCloud()
{
int pro_id = Convert.ToInt32(proj_id);
int iteration_id = Convert.ToInt32(iteration);
var tagSummaryNegative = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 1 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
tagCount = tagGroup.Count()
};
var tagSummaryNegativeIteration = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == iteration_id &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 1 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
tagCount = tagGroup.Count()
};
var tagSummaryPositive = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 0 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
tagCount = tagGroup.Count()
};
var tagSummaryPositiveIteration = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == iteration_id &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 0 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
tagCount = tagGroup.Count()
};
int maxTagFrequencyNegative = (from t in tagSummaryNegative select (int?)t.tagCount).Max() ?? 0;
int maxTagFrequencyPositive = (from t in tagSummaryPositive select (int?)t.tagCount).Max() ?? 0;
int maxTagFrequencyNegativeIteration = (from t in tagSummaryNegativeIteration select (int?)t.tagCount).Max() ?? 0;
int maxTagFrequencyPositiveIteration = (from t in tagSummaryPositiveIteration select (int?)t.tagCount).Max() ?? 0;
var tagCloudNegative = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 1 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
weight = (double)tagGroup.Count() / maxTagFrequencyNegative * 100
};
var tagCloudNegativeIteration = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == iteration_id &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 1 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
weight = (double)tagGroup.Count() / maxTagFrequencyNegative * 100
};
var tagCloudPositive = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 0 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
weight = (double)tagGroup.Count() / maxTagFrequencyNegative * 100
};
var tagCloudPositiveIteration = from af in db.AgileFactors
join psf in db.ProjectStoryFactors on af.AgileFactorID equals psf.AgileFactorID
join s in db.Stories on psf.StoryID equals s.StoryID
join pim in db.ProjectIterationMembers on s.ProjectIterationMemberID equals pim.ProjectIterationMemberID
join it in db.Iterations on pim.ProjectIterationID equals it.ProjectIterationID
join pro in db.Projects on it.ProjectID equals pro.ProjectID
where pro.ProjectID == pro_id &&
pro.ProjectID == it.ProjectID &&
it.ProjectIterationID == iteration_id &&
it.ProjectIterationID == pim.ProjectIterationID &&
pim.ProjectIterationMemberID == s.ProjectIterationMemberID && s.StoryCategoryID == 0 &&
s.StoryID == psf.StoryID &&
psf.AgileFactorID == af.AgileFactorID
group af by af.Name into tagGroup
select new
{
Tag = tagGroup.Key,
weight = (double)tagGroup.Count() / maxTagFrequencyNegative * 100
};
if (iteration_id != 0)
{
ListView1.DataSource = tagCloudNegativeIteration;
ListView1.DataBind();
ListView2.DataSource = tagCloudPositiveIteration;
ListView2.DataBind();
}
else
{
ListView1.DataSource = tagCloudNegative;
ListView1.DataBind();
ListView2.DataSource = tagCloudPositive;
ListView2.DataBind();
}
}
As I understood you use filteroptions_SelectedIndexChanged method to put selected iteration into session. And then use value from session on tag cloud control to bind correct data. However event handlers are executed after page's and control's load events. I suggest you binding tag cloud at some later point of time (Page_PreRender for instance).
Edit: I think you should replace your Page_Load method in the ASCX.CS file with following snippet: