/// <summary>
/// Handles events that occur when an edit operation is requested, but before the Update Subquestions ListView item is put in edit mode.
/// </summary>
/// <param name="sender">Contains a reference to the control/object that raised the event.</param>
/// <param name="e">Provides data for the ItemEditing event, which occurs when an edit operation is requested but before the ListView item is put in edit mode.</param>
protected void UpdateSubQuestionsListView_ItemEditing(object sender, ListViewEditEventArgs e)
{
//hide message user control
MessageUserControl.Visible = false;
//hide datapager
DataPager pager = UpdateSubQuestionsListView.FindControl("ActiveDataPager") as DataPager;
pager.Visible = false;
}
/// <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 FetchSubQuestionsButton_Click(object sender, EventArgs e)
{
//if user selects the "Select a question..." option in the dropdown list, do the following actions:
if (QuestionsWithSubQuestionsDropDownList.SelectedValue == "0")
{
//show error message
MessageUserControl.Visible = true;
MessageUserControl.ShowInfoError("No Question Selected", "Please select a question.");
//highlight the dropdown list, and refresh the Update Subquestions listview
QuestionsWithSubQuestionsDropDownList.Focus();
UpdateSubQuestionsListView.DataBind();
}
//if user selects a question from the dropdown list, show informational message
else
{
MessageUserControl.ShowInfo("Subquestions Displayed", "Subquestions under the selected question are now displayed.");
UpdateSubQuestionsListView.DataBind();
}
}
/// <summary>
/// Handles events that occur when a button in the Subquestions 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 UpdateSubQuestionsListView_ItemCommand(object sender, ListViewCommandEventArgs e)
{
//If the Edit button is clicked, do the following actions:
if (e.CommandName.Equals("Edit"))
{
//show informational message
MessageUserControl.Visible = true;
MessageUserControl.ShowInfo("Edit Mode Active", "The subquestion text in the selected row can now be edited.");
//disable drop-down list and fetch button to prevent editing of subquestions of other questions
QuestionsWithSubQuestionsDropDownList.Enabled = false;
FetchSubQuestionsButton.Enabled = false;
}
//If the Change button is clicked, do the following actions:
else if (e.CommandName.Equals("Change"))
{
//capture the questionId associated to the selected subquestion
int questionId = int.Parse(e.CommandArgument.ToString());
//capture the display index
int i = e.Item.DisplayIndex;
//find the selected subquestion text box
TextBox subQuestionTextBox = UpdateSubQuestionsListView.Items[i].FindControl("subQuestionTextTextBox") as TextBox;
//capture the question text in the selected subquestion text box
string subQuestionText = subQuestionTextBox.Text;
//handle null values and white-space-only values
if (string.IsNullOrEmpty(subQuestionText) || string.IsNullOrWhiteSpace(subQuestionText))
{
//show error message
MessageUserControl.Visible = true;
MessageUserControl.ShowInfoError("Processing Error", "Subquestion is required.");
//highlight the subquestion row that caused the error
subQuestionTextBox.Focus();
}
//if user-entered value is not null or just a white space, do the the following actions:
else
{
MessageUserControl.TryRun(() =>
{
//check if user entered invalid values
Utility utility = new Utility();
utility.checkValidString(subQuestionText);
//update the subquestion text of the selected row
QuestionController sysmgr = new QuestionController();
sysmgr.SubQuestion_Update(questionId, subQuestionText);
UpdateSubQuestionsListView.DataBind();
UpdateSubQuestionsListView.EditIndex = -1;
}, "Success", "Subquestion has been updated.");
}
//show success/error message
MessageUserControl.Visible = true;
//show datapager
DataPager pager = UpdateSubQuestionsListView.FindControl("ActiveDataPager") as DataPager;
pager.Visible = true;
//enable drop-down list and fetch button to allow editing of other subquestions of other questions
QuestionsWithSubQuestionsDropDownList.Enabled = true;
FetchSubQuestionsButton.Enabled = true;
}
//If the Cancel button is clicked, do the following actions:
else if (e.CommandName.Equals("Cancel"))
{
//show informational message
MessageUserControl.Visible = true;
MessageUserControl.ShowInfo("Update Cancelled", "No changes to the selected subquestion were saved.");
//show datapager
DataPager pager = UpdateSubQuestionsListView.FindControl("ActiveDataPager") as DataPager;
pager.Visible = true;
//enable drop-down list and fetch button to allow editing of other subquestions of other questions
QuestionsWithSubQuestionsDropDownList.Enabled = true;
FetchSubQuestionsButton.Enabled = true;
}
}
