C# - Save Files From Dynamically Added FileUpload Controls
Jan 15, 2011
I'm building an ASP.NET UserControl where users of the website can upload several pictures at once. I'm doing it the old fashioned way by letting the user enter the amount of FileUpload controls wanted and then add them dynamically from C# to a asp:Panel control.
While this works, the values/files from the FileUpload isn't stored for when the user clicks the "Save" button. How exactly do I go about this problem?
My code for specifying the amount of FileUpload controls wanted:
[code]....
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[code]....
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I am trying to create a RadioButtonListWithOther class that extends the RadoButtonList but I can't get the "Other" textbox to render on the page. When I step through while debugging I can see the control in the parent control's Controls collectio but it still doesn't render.
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[Code]....
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[Code]....
[Code]....
[Code]....
[Code]....
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Code:
Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
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[Code] ....
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I have a C# web application that dynamically adds user controls to the default page for whatever "mode" the application is in. The problem is that it is not persisting these across postbacks. How do I persist these across postbacks and keep the content of the controls that are in the user control?
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Sep 1, 2010
The situation:
I have user controls with buttons that have hooked events. Controls with events need to be initialized in Page_Load or earlier.
I wish to spawn these user controls dynamically by clicking an Add button.
It is important to remember that events, such as click events, are not fired until just before Page_LoadComplete.
Broken Solution A:
[code]...
Result: Everything works great, except the button within the added user control is inert.
The conundrum is: I need controls to spawned by a button click, which means I need to put my Controls.Add(...) code in Page_LoadComplete. Inversely, I need the controls being added to have working events, which means the Controls.Add(...) code need to be in Page_Load. I have a perfect dichotomy.
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Apr 19, 2014
I have a MultiView inside an updatePanelThis MultiView has 7 Viewin each view I have Two button (next, prev) I have two fileupload in view6 and two button (btn_nextSix and btn_prevFive)I put this code in updatepanel
<Triggers>
<asp:PostBackTrigger ControlID = "btn_nextSix " />
</Triggers>
And found after click on btn_nextSix, fup_pic.hasfile is true but by clicking in last button (btn_reg) I found fup_pic.hasfile is false so I changed my code like this (I putted all buttons in multiview in triggers)...
</asp:MultiView>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID = "btn_nextOne" />
<asp:PostBackTrigger ControlID = "btn_nextTwo" />
[Code] ....
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Mar 8, 2010
How to maintain view state for the dynamically added html controls to a table using javascript(Below is the javascript which I am using to add HTML Controls Dynamically"). Because during the postbacks if I found any error while validating the data present in the dynamically added html controls, the controls are loosing their state and again I need to start adding rows and add data.
[Code]....
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Apr 24, 2010
I have ONE <asp:Button ID="btnAddUC" runat="server" ......./> and ONE <asp:Table ID="tblUC" runat="server"...> on my page. User clicks on btnAddUC, user control is added to the page [user can add 'n' user controls to the page]. here I have no problem, adding user controls to the page on user clicks.
My user control has ONE <asp:DropDownList ID="ddlItems" runat="server" ......./> and ONE <asp:CheckBoxList ID="chkItems" runat="server"..../>. I am exposing "ddlItems" by public method, "chkItems" is not exposed. "chkItems" is binded on SelectedIndexChanged event of "ddlItems".
Execution scenario:
User adds user control to the page, select item from the "ddlItems" ( Note: "ddlItems" is exposed by public property ) , "chkItems" is populated ( using ddlItems.SelectedItem.Value ) . User checks some checkboxes in "chkItems" and then decide to add one more user control. When the second user control is added to the page, checkboxes in the first usercontrol lose their state and apeears unchecked (NOTE: user checked some checkboxes and then added another user control).
I want to put checked beckboxes index in session ( Before another control is added, which event I should use, because at LOAD event there is nothing).
I was able to restict SelectedIndexChanged event to only that user control whcih generated it (checking _EVENTTARGET)
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