/// <summary>
/// Populates and updates the subquestions list view based on the selected question
/// </summary>
/// <param name="sender">Contains a reference to the control/object that raised the event.</param>
/// <param name="e">Represents the base class for classes that contain event data, and provides a value to use for events that do not include event data.</param>
protected void FetchAnswersButton_Click(object sender, EventArgs e)
{
//if user selects the "Select a question..." option in the dropdown list, do the following actions:
if (QuestionsWithAnswersDropDownList.SelectedValue == "0")
{
//show error message
MessageUserControl.Visible = true;
MessageUserControl.ShowInfoError("No Question Selected", "Please select a question.");
//highlight the dropdown list and refresh the answers listview
QuestionsWithAnswersDropDownList.Focus();
UpdateAnswersListView.DataBind();
}
else
{
//show informational message
MessageUserControl.ShowInfo("Answers Displayed", "Answers associated under the selected question are now displayed.");
UpdateAnswersListView.DataBind();
}
}
/// <summary>
/// Handles events that occur when a button in the Questions list view is clicked.
/// </summary>
/// <param name="sender">Contains a reference to the control/object that raised the event.</param>
/// <param name="e">Provides data for the ItemCommand event, which occurs when a button in a ListView is clicked.</param>
protected void UpdateQuestionsListView_ItemCommand(object sender, ListViewCommandEventArgs e)
{
//hide message user control
MessageUserControl.Visible = false;
//If the Edit button is clicked, show informational message
if (e.CommandName.Equals("Edit"))
{
MessageUserControl.Visible = true;
MessageUserControl.ShowInfo("Edit Mode Active", "The question text in the selected row can now be edited.");
}
//If the Change button is clicked, do the following actions:
else if (e.CommandName.Equals("Change"))
{
int i = e.Item.DisplayIndex;
//Capture and store the question text on the selected index
TextBox questionTextBox = UpdateQuestionsListView.Items[i].FindControl("questionTextTextBox") as TextBox;
string questionText = questionTextBox.Text;
//handle null values and white-space-only values
if (string.IsNullOrEmpty(questionText) || string.IsNullOrWhiteSpace(questionText))
{
//show error message
MessageUserControl.Visible = true;
MessageUserControl.ShowInfoError("Processing Error", "Question is required.");
//highlight the question textbox that handled the error
questionTextBox.Focus();
}
//if user-entered value is not null or just a white space, do the the following actions:
else
{
//find the question Id repeater that stores the question Ids associated with the edited question text
Repeater questionIdRepeater = UpdateQuestionsListView.Items[i].FindControl("QuestionIdListRepeater") as Repeater;
//loop through the question Id repeater
foreach (RepeaterItem item in questionIdRepeater.Items)
{
//capture the question Id
int questionId = int.Parse(((Label)item.FindControl("questionIdLabel")).Text);
MessageUserControl.TryRun(() =>
{ //check if user entered invalid values
Utility utility = new Utility();
utility.checkValidString(questionText);
//Update the selected question(s)
QuestionController sysmgr = new QuestionController();
sysmgr.Question_Update(questionText, questionId);
//turn off edit mode and refresh the listview
UpdateQuestionsListView.EditIndex = -1;
UpdateQuestionsListView.DataBind();
}, "Success", "Question has been updated.");
}
//show success/error message captured by message user control's try run method
MessageUserControl.Visible = true;
//reset update subquestions tab
QuestionsWithSubQuestionsDropDownList.Items.Clear();
QuestionsWithSubQuestionsDropDownList.Items.Add(new ListItem("Select a question...", "0"));
QuestionsWithSubQuestionsDropDownList.DataBind();
QuestionsWithSubQuestionsDropDownList.Enabled = true;
FetchSubQuestionsButton.Enabled = true;
//reset update answers tab
QuestionsWithAnswersDropDownList.Items.Clear();
QuestionsWithAnswersDropDownList.Items.Add(new ListItem("Select a question...", "0"));
QuestionsWithAnswersDropDownList.DataBind();
QuestionsWithAnswersDropDownList.Enabled = true;
FetchAnswersButton.Enabled = true;
//show datapager
DataPager pager = UpdateQuestionsListView.FindControl("ActiveDataPager") as DataPager;
pager.Visible = true;
}
}
//If the Cancel button is clicked, show informational message
else if (e.CommandName.Equals("Cancel"))
{
MessageUserControl.Visible = true;
MessageUserControl.ShowInfo("Update Cancelled", "No changes to the selected question were saved.");
//show datapager
DataPager pager = UpdateQuestionsListView.FindControl("ActiveDataPager") as DataPager;
pager.Visible = true;
}
}