I have a page with radio buttons and a textarea that populates data dynamically based on your selection. The radio buttons act as a list of article titles and on selection you see the content of the article.
Within my pageload method, I want to allow users to be able to see a URL in their browser that points to value they've. That way they can link to the article within another source.
Currently, the method I have allows me to link to the button selection if I manually type in the following example URLs:
http://localhost/test/Articles_test.aspx?selected=1
http://localhost/test/Articles_test.aspx?selected=2
I'd like to modify this so that the URL appears in the browser when a radio button selection is made. Plus, on page load defaults to the "0" index if no value parameter was specified.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
int selected;
if (int.TryParse(Request.QueryString["selected"], out selected))
RadioButtonList1.SelectedIndex = selected;
RadioButtonList1.DataBind();
}
}
protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
string strRedirect;
strRedirect = "frm_Articles.aspx?selected=" + RadioButtonList1.SelectedIndex;
Response.Redirect(strRedirect);
}
Set your radiobutton list to post back on change. Then, in the handler, do a redirect to the appropriate URL:
protected void Page_Load(object sender, EventArgs e)
{
int selected;
if (int.TryParse(Request.QueryString["selected"], out selected))
RadioButtonList1.SelectedIndex = selected;
RadioButtonList1.DataBind();
}
protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
string strRedirect;
strRedirect = "frm_Articles.aspx?selected=" + RadioButtonList1.SelectedIndex;
Response.Redirect(strRedirect);
}
Related
I am having a problem. Data is not loading once the page loads. I have to choose an item on the dropdown list for it to load. I need it to load even before I choose any item on the drop down list.
This is my code behind.
protected void ddlPeriodStamp_SelectedIndexChanged(object sender, System.EventArgs e)
{
string selectedGroup = string.Empty;
DropDownList ddlItemGroup = (DropDownList)sender;
if (ddlItemGroup.SelectedValue != null)
TreatmentGroup = ddlItemGroup.SelectedValue;
ApplyGridFilter(ddlItemGroup.SelectedValue);
}
protected void ApplyGridFilter(string TreatmentGroup)
{
string selectedGroup = string.Empty;
DBDataSource1.State.BusinessObject.DataPump.FormFilters.Clear();
DBDataSource1.State.BusinessObject.DataPump.FormFilters.Add("TreatmentGroup", TreatmentGroup);
DBDataSource1.State.BusinessObject.Fill(null);
MedicalSchemeDetailGrid.DataBind();
}
protected void Page_LoadComplete(object sender, System.EventArgs e)
{
if (!this.IsPostBack)
ApplyGridFilter(string.Empty);
}
Call ApplyGridFilter(string.Empty); while ispostBack is false and call ApplyGridFilter(ddlItemGroup.SelectedValue); while ispostBack is true
protected void Page_LoadComplete(object sender, System.EventArgs e)
{
if (this.IsPostBack)
{
ApplyGridFilter(ddlItemGroup.SelectedValue);// it will hit on first time page load
}
else
{
ApplyGridFilter(string.Empty);// it will hit while you change the dropdown items, But you should set true for **IsAutoPostBack** property on dropsownlist.
}
}
You need to fill your data in Page_Load event not in Page_LoadComplete event. According to MSDN:
The LoadComplete event occurs after all postback data and view-state
data is loaded into the page and after the OnLoad method has been
called for all controls on the page.
protected void Page_Load(object sender, System.EventArgs e)
{
if (!this.IsPostBack)
ApplyGridFilter(string.Empty);
}
I want to use this solution to convert URLs to link in a listview label.
private string ConvertUrlsToLinks(string text)
{
string regex = #"((www\.|(http|https|ftp|news|file)+\:\/\/)[_.a-z0-9-]+\.[a-z0-9\/_:#=.+?,##%&~_-]*[^.|\'|\# |!|\(|?|,| |>|<|;|\)])";
System.Text.RegularExpressions.Regex r = new System.Text.RegularExpressions.Regex(regex, System.Text.RegularExpressions.RegexOptions.IgnoreCase);
return r.Replace(text, "$1").Replace("href=\"www", "href=\"http://www");
}
I have tried this in the listview databound but its not working.
protected void ProjectRecentActiviyListView_ItemDataBound(object sender, ListViewItemEventArgs e)
{
Label ProjectPostLabel = (Label)e.Item.FindControl("ProjectPostLabel");
ProjectPostLabel = ConvertUrlsToLinks({0});
}
Thank you
According to your code you are using ASP.NET Web Forms, not MVC.
You must use your ProjectPostLabel instance with Text property - no need to create a new label that is not assign to anywhere.
From your event you must retrieve Url property, not the label control. I have used NorthwindEmployee class with URL property in my ListView. You must cast it to your own class that is used in the list view.
protected void ProjectRecentActiviyListView_ItemDataBound(object sender, ListViewItemEventArgs e)
{
ProjectPostLabel.Text = ConvertUrlsToLinks(((NorthwindEmployee)e.Item.DataItem).URL);
}
And you must remember that only the last item from your list view will be displayed in the label (unless you expect that behavior). If you want to list of URLs from the list you can write this:
protected void Page_Load(object sender, EventArgs e)
{
ProjectPostLabel.Text = string.Empty;
}
protected void ProjectRecentActiviyListView_ItemDataBound(object sender, ListViewItemEventArgs e)
{
ProjectPostLabel.Text += string.Format("{0}<br/>", ConvertUrlsToLinks(((NorthwindEmployee)e.Item.DataItem).URL));
}
I have a combo box I added items to in the page load method and within a button click I am trying to set either the text that is typed or the item selected from the dropdown. I am using ComboBox.SelectedItem.ToString() which works when something is typed in but once the user selects something from dropdown the string is empty that is passed through.
protected void Page_Load(object sender, EventArgs e)
{
if (ScriptManager.GetCurrent(Page) == null)
{
Page.Form.Controls.AddAt(0, new ScriptManager());
}
DiffComboBoxUrls.Items.Add(XMLConstants.PolicyStoreApplications.Value1);
DiffComboBoxUrls.Items.Add(XMLConstants.PolicyStoreApplications.Value2);
DiffComboBoxUrls.Items.Add(XMLConstants.PolicyStoreApplications.Value3);
DiffComboBoxUrls.Items.Add(XMLConstants.PolicyStoreApplications.Value4);
DiffComboBoxUrls.Items.Add(XMLConstants.PolicyStoreApplications.Value5);
}
protected void ChangeAppSettings_Click(object sender, EventArgs e)
{
string FOPath = FODirectory.Text;
string PolicyStoreName = DiffComboBoxUrls.SelectedItem.ToString(); //this comes back as "" when an item is selected and works when something is typed in
.....
}
I have a simple ASP.NET Application. And On one of my pages all dropdownlist_SelectedIndexChanged events trigger only after I click save button.
This is part of my code behidn:
protected void ddlTimekeeperOffice_SelectedIndexChanged(object sender, EventArgs e)
{
CheckUniqueCombination();
}
protected void ddlTkprDepartment_SelectedIndexChanged(object sender, EventArgs e)
{
CheckUniqueCombination();
}
protected void ddlTkprSummaryTitle_SelectedIndexChanged(object sender, EventArgs e)
{
CheckUniqueCombination();
}
this is 3 dropdowns
protected void btnSave_Click(object sender, EventArgs e)
{
trTimekeeperRow.Visible = true;
}
and a save button.
When I select anything in dropdowns > Nothing happens
Then I click save button and before save_click it goes through every ddl_selectedindexchanged.
Why?
Make sure AutoPostBack property of the dropdown controls is true.
Suppose there is a user control in a page called Paging.ascx that is embedded in PageWithResults.aspx. This control has the necessary properties to keep track of various details about what page you're on (ie: CurrentPage, TotalRecordsInResults, RecordsPerPage, etc..). It also contains events that fire off when you click on a hyperlink ("next page" or "previous page"). Example below. I need to tell PageWithResults.aspx that one of these LinkButton web controls was clicked. I think I need to assign a delegate in the page, so that when this user control event is called (hyperlink is clicked), it also calls some other method/event in the page class. That way I can quickly check what the new value of CurrentPage is (based on what was called in the event below) and get a new result set for the new page (based on the CurrentPage property). But I'm not sure of the best approach. I'm thinking this will require a delegate, but I'm not sure how to wire it up. If you need more details, please ask.
protected void btnNext_Click(object sender, EventArgs e)
{
this.CurrentPage = this.CurrentPage + 1;
if (OnPageChanged != null) OnPageChanged(this.CurrentPage);
}
I'm thinking I have to put my delegate here somewhere. ??
protected void btnNext_Click(object sender, EventArgs e)
{
this.CurrentPage = this.CurrentPage + 1;
if (OnPageChanged != null) OnPageChanged(this.CurrentPage);
//delegate to call object.method or something
}
Using an event would work fine.
You would create the event within your UserControl like so:
public event EventHandler ButtonClicked;
Then invoke the event when required:
protected void Button1_Click(object sender, EventArgs e)
{
if (ButtonClicked != null)
ButtonClicked(this, new EventArgs());
}
In your page you would need to assign an event handler:
protected void Page_Load(object sender, EventArgs e)
{
UserControl1.ButtonClicked += new EventHandler(UserControl1_ButtonClicked);
}
void UserControl1_ButtonClicked(object sender, EventArgs e)
{
}
As well as using the above approach you can also cast the Page reference in the UserControl and call a public method directly:
MyPage page = (MyPage)Page;
page.AMethod();
Hope this helps.