I have a repeter in page. I set datasource for it in page load.
LikeRepeater.DataSource = clsForumQuestionLikeViewFactory.GetAllByFieldDT(clsForumQuestionLikeView.clsForumQuestionLikeViewFields.QuestionID, id);
LikeRepeater.DataBind();
I have a linkbutton. when click it, I add a record to database and set datatsource for repeater.
protected void ParentLikeButton_Click(object sender, EventArgs e)
{
LikeRepeater.DataSource = clsForumQuestionLikeViewFactory.GetAllByFieldDT(clsForumQuestionLikeView.clsForumQuestionLikeViewFields.QuestionID, IDLabel.Value);
LikeRepeater.DataBind();
}
It have two item but show one, Repeater don't refresh.
How to refresh it?
your datasource is updated ParentLikeButton_Click event but on page load event you set old datasource. so every time you add data might be updated but from page load it takes old data so you need to bind data in if(!isPostback) condition
like this
in page load event check condition
if(!IsPostBack)
{bind data here for first time}
add "LikeRepeater.DataSource = null" before Setting its
Related
In my page, I load various sections after the initial Page load, via Postbacks and .Visible = true. I have a Repeater control which I want to fill from a data source, but only the first time I load the Control.
Initially, I had tried something like the following, which is obviously not correct:
void Page_PreRender(object sender, EventArgs e)
{
if (Repeater1.DataSource == null)
{
Repeater1.DataSource = GetDataInitial(); // Does the query of the data source
Repeater1.DataBind();
}
}
In short, I am trying to query some set of properties to tell me whether or not something has already bound data to it. I can't use !Page.IsPostBack since the Load may happen on a Post-Back.
If it helps, we can assume that I am only loading this section on the Click event of the control Button1.
I have an update panel which refreshes a user control. The update panel is set to conditional, and the condition is on a textbox control. Using AsyncPostBackTrigger, to fire when the text changes in the textbox, it works fine. However, what I am not getting is when the page is first loaded, and the textbox is populated with data is that it is not firing the postback trigger.
Is there a way of forcing it fire when the page is loaded for the first time?
I have tried simple things such as UpdatePanel.Update(), or txtbox.text = string.empty to force it to recognise a change- but no luck.
Any ideas anyone?
Thanks
Please replace with your ids
private void tb_Loaded(object sender, RoutedEventArgs e)
{
TextStateChanged((TextBox)sender);
}
UpdateSite.txtPhone.Loaded += new RoutedEventHandler(tb_Loaded);
I renew parameters of my DataSource for GridView on Button and loads event Page_Load()
and After it (or with it) GridView renews itself.
I need to rename Header rows but there is no event after Page Load.
more information about details here :
[On Button Click] I change DataSource and Bind it (SqlDataSource1.DataBind(); ) Then sure Page gone to Refresh elements.
[On Page_Load] GridView is changing data, but if I can't change Headers there because it's looking like loads after this function :(
[one more Button] I can add new button with a function - rename headers and it works correct everytime
protected void Button2_Click(object sender, EventArgs e)
{
// Stack overflow
DataRow T;
if (go)
if (GridView2.HeaderRow.Cells.Count != 0)
for (int i = 0; i < SQF.SQF.Permission.Rows.Count; i++)
{
T = SQF.SQF.Permission.Rows[i];
GridView2.HeaderRow.Cells[i].Text = (string)T["Caption1"];
WebMsgBox.Show((string)T["Caption1"]);
}
}
Trouble : I no need one more button for it, I need to rename header rows after I click button to change Data but I have no idea where I can do it.
thank you.
Well you could use Gridview DataBound event, like that:
<asp:GridView runat="server" ID="SomeID" OnDataBound="GridVIew_OnDataBound" ... />
The DataBound event occurs right after the databinding process for that particular control has completed.
After Page_Load there is an event Page.PreRender.
Maybe it will suit you.
EDIT.
All events of your components, such as GridView, are fired between Page.Load and Page.PreRender. Consider using RowDataBound and RowUpdated events.
Here's the scenario:
-Gridview control
-Calendar control
I only want the calendar to show if a specific item is chosen in the drop down list which is in a gridview. When the grid view row is updated I want to change whether or not the calendar is visible. The calendar's visibility only shows correctly on the next post back.
Page_Load is called before events which are called before Render. There is no reason why you couldn't, in your event, check the value of the dropdownlist and set the Calendar control visible property, this would then knock into Render.
Try adding a check of IsPostBack before setting the loading your GridView. That will prevent you from overwriting it's values.
protected void Page_Load(object sender, EventArgs e) {
if(!IsPostBack) {
/*Populate your GridView*/
}
}
protected void GridView_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
/*show your calendar here if you need to*/
if(whatever) calendar.Visible = true;
}
This should work, if it doesn't then I'd recommend putting breakpoints in your Page_Load and RowUpdated methods and stepping through it, preferrably with a Watch on the gridview's datasource (it'll go red if it's changed) and a watch on calendar.Visible, to help you see if something has changed.
For the record, control events like OnRowUpdated will never fire before Page_Load unless explicitly called for some reason. Chances are you're just doing something where it's not updating the content of the GridView before it gets to the RowUpdated method, or it's overwriting the data in the GridView due to a lack of !IsPostBack check.
I have a ASP.NET GridView that uses template columns and user controls to allow me to dynamically construct the datagrid. Now I'm implementing the event handler for inserting a row. To do that, I create an array of default values and add it to the data table which is acting as a data source. However, when my OnLoad event is fired on postback, all my template columns no longer have the user controls. My gridview ends up just being all blank with nothing in it and my button column disappears as well (which contains the add row, delete row and save buttons).
My row add event just does this:
public void AddDataGridRow()
{
List<object> defRow = new List<object>();
for (int i = 0; i < fieldNames.Count; i++)
{
defRow.Add(GetDefaultValueFromDBType(types[i]));
}
dt.Rows.Add(defRow);
}
It is fired from a button in a user control that's implement like this:
protected void Button1_Click(object sender, EventArgs e)
{
((Scoresheet)(this.Page)).AddDataGridRow();
}
My on load event does a bunch of stuff on first run to set the GridView up but I don't run that again by using the IsPostBack property to tell.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
Initialize();
}
Anyone have any hints as to why my user controls are vanishing?
You have to add the controls to the grid on every page_load, not just if it's (!Postback)
Do you have the EnableViewState=true on the usercontrols and the GridView?
Is the AddDataGridRow() method called by Initialize()? You basically have two options:
Bind the grid on every postback and do not use viewstate (performace loss)
Bind the Grid only the first time (if (!IsPostBack)), and make sure that your user controls keep their viewstate.
From your code, it is not clear whether the user controls keep viewstate and what they have in them. It is not even clear what is the execution order of the methods you've shown. There is no binding logic, so even if you keep adding rows, the grid may still not be bound. Please elaborate a bit and show the whole page codebehind.