I have build a usercontrol in asp.net, and there is a property like the following.
Everything works fine when the bound value is an integer. However, if the bound field return a null from database, it will return a invalid cast error.
change to a nullable int is not desirable because it changes the how programmer work with the control's property in code-behind.
[code]....
I am trying to bind a string that contains the ClientID of one user control to the property of another control within a GridView template column. I get the error 'lblVar02' is not declared. It may be inaccessible due to its protection level. How do I do this?
<uc:CriteriaType id="ctVar02" runat="server"
OnClientChange="<%# "toggle('" & lblVar02.ClientID & "');" %>"></uc:CriteriaType>
<uc:Label ID="lblVar02" runat="server" />
I have a database field called ImageLocation, I have the ImageUrl property bound to: Eval("ImageLocation", "{0}")I would like to bind the Visble property to false if the ImageLocation is null data. I can not figure out how to set the control properly, currently the Datalist shows me all the data and when the image location is null it shows me the name of the Hyperlink control which happens to be Hyperlink2.
View 2 RepliesI am using a FormView control. The allows me to update records in the database. However, when a database field is null I can not update the field on the form. It works fine when the field is not a null value. I am not using any code behind (C#) to bind the data or manipulate the data.
I have read that when there is a null value in the database thatthere is no record in the "dataset". Can anyone show me how to bind a value in the form when there is a null value previously.
cription" content="" /></asp:Content> <asp:Content ID="Content4" ContentPlaceHolderID="PageTitle" Runat="Server"> <asp:TextBox ID="TextTitle" runat="server" BorderStyle="None" Font-Bold="True" Font-Names="Arial" Font-Size="18px"></asp:TextBox></asp:Content> <asp:Content ID="Content2"[code]....
So what I'm trying to accomplish is this
[Code]....
The user control has public properties named accordingly and the page has protected properties accordingly which I've verified have the desired values.
For some reason the values are always empty strings or 0s in the usercontrol, no matter what the page property is.
Can anyone add a complete input about how to create Parent Property with multiple child properties or in short nested properties.
Example: Style tag: which has properties like font, color, display... etc? which accept objects and its value.
[code]....
As soon as Rainbow property is typed, user should get intellisense for list of number of colors. Then accordingly user can select list of those colors and assign a value to them.
I currently have a repeater control and inside the itemtemplate I have a usercontrol. This usercontrol renders correctly, but I am trying to assign a dataitem to a property in the repeater control.
[code]...
RequestId is just an Int32. It just doesn't assign it.
I can put the eval outside of the usercontrol just in the itemtemplate and it correctly outputs the right id.
If I remove the whole eval and just type a number in then it works fine. I was using an EntityDataSource and this automatically binded to the repeater. It printed out all the information from the database on the screen without any codebehind. But when I put in the code behind Repeater1.DataBind(); it then started to work.
I don't know why, but hey it's solved. It now successfully passes the value through. I imagine it has something to do with the page lifecycle.
I have a user control in asp.net that i need to dynmically set properties for. The propety and property values are in a dictionary, for example:
Dictionary<string, string> propertyValues;
Control c = Page.LoadControl("~/Control.ascx")
I can currently set the properties on the control using reflection, however, with .net 4 and the new dynamic keyword, is there an easier way to do it, for example, something like this:
dynamic c = Page.LoadControl("~/control.ascx");
foreach(var itemin propertyValues)
{
c.item.key = item.value;
}
this obviously doesnt work because item.key is a string and not a property.
I built a simple user control called noteEditor. I need to set/get the CommandName property when the control is used in a gridview. I seem to be able to set it just fine but when I to get it I get a null.Here is the code for my user control:
[Code]....
Here is how I use the control in a gridview on the host page:
[Code]....
As indicated by the comment, e.CommandName always returns an empty string.
I have developped a usercontrol, but I can't seem to find how to databind on a property of the usercontrol in a detailsview.The property is defined this way:
<Bindable(True, BindingDirection.TwoWay)>
Public Property Value As String
Get[code].....
I want to use multiple targets with my ModalPopUp extender. One of my buttons is set as target in the ModalPopup and the other one will use server-side code to show the ModalPopup.
This is my ModalPopup so far:
<msAjax:ModalPopupExtender ID="modalInform" runat="server"
BehaviorID="modalInform"
TargetControlID="btnSearchUsers" [code].....
Then I found this little tutorial on the ASP.NET AJAX site.But when I use $find("modalInform") in the pageLoad Javascript function (as defined in the tutorial at the bottom), I'm always getting a $find("modalInform") is null error.
This code is included in a usercontrol, the usercontrol is used in a ASPX page and this ASPX-page uses a MasterPage.
I've noticed that if I'm using
<%= modalInform.ClientID %>
I'm getting a different value then defined in my HTML-source (propably because of the MasterPage?).
I have a UserControl that is on a masterpage... I have created the following property for the userControl in the codebehind:
[Code]....
Now I need to access this control and change that property from an aspx page that uses the masterpage with the control. I'm stuck I cannot seem to find the controls property. I can find the control and make it visible or not but I cannot find the property to modify control...
this is about ASP.NET, ViewState, UserControls and loosing the values of my properties. It is an classic question by know, I know, and even though I have searched here and on Google for a resolution to this problem, I havent succeeded. On the contrary, the more I test different things, the less I understand it seems.
On top of this I am using ext.net and their so called DirectMethod's but I dont think that has much to do with this problem. There are numerous questions I have and I hope that this text will be fairly readable and understandable =)
The UserControl
I have a UserControl, Customers.ascx, that contains some Properties. The "most" important is *_CustomerId*. The _CustomerId is set in code-behind, in ext.net's "DirectMethod" like this (code below from the Page Customers.aspx):
[code]....
I just started learning silverlight by creating a silverlight application in Visual Web Developer 2008. I have a public property defined in the user control. How do I access this property value in the aspx codebehind page?
View 2 RepliesI have a function that Localize the text of my control.
// code behind
lblName.Text = Localization.GetLocalValue( "Updated" , this.Path );
and I know that i can call a function inside ascx file.
// ascx file
Text='<%#Global.Convert( (DateTime)(Eval("CreatedDate")) %>'
How can i Get Path Property in ascx file To call GetLocalValue ?
is it possible to bind gridview inside of usercontrol from content page, if so how?
View 1 RepliesI have a .ascx file residing in another page which has a button on it. On click I run a select statement that accesses the textbox for a value.
However, it keeps returning a Null Exception Error. I am trying access the textbox and its text through
[Code]....
I also tried -[Code]....
I also tried -[Code]....
But none of them work. Please can someone advise me how I find the textbox and then access its text?I have looked round the forums / google and cant find a way of doing this!
I have a UserControl that has some controls inside. I want to refer those controls after, in another postback. But when I try to get them the Controls property of my controls returns null. I'm working on vs2008.
Here is the sample code:
[code]....
I have this public property in the codefile of an aspx page:
[Code]....
Then in that aspx page I have a usercontrol (.ascx), how can I access the above public property form its codebehind?
I need to read a Property/variable from outside the webpart usercontrol to determine a course of action. This is not the same as using the Property Editor.
I have numerous usercontrol webparts all accessing the database.
When minimised, I don't want the webpart to hit the database.
So, I need to either : detect within the usercontrol webpart itself that its chromstate is minimised and therefore not access the database (and)or from the Webpartmanager loop through webparts, determine those that are minimised and set a variable / property within the webpart to inform it not to access the database on postback.
Something like...(pseudoCode)
for (int i = 0 ; i < webpartmanager1.webparts.count ; i++ )
webpart wp = (webpart)webpartmanager1.webpart[i];
if (wp != null)
if (wp.ChromeState == PartChromeState.Minimized)
{
// set a known variable in this particular webpart so it can determine whether to refresh its datagrid or gridview or whatever
}
}
OR
Can a usercontrol webpart determine its own ChromeState ????
I have a custom control in an aspx page that has a property named Size
public int Size
{
get { return Convert.ToInt32(ViewState["CreativeSize"]); }
set { ViewState["CreativeSize"] = value; }
}
This property is set in the aspx page to a value lets say 500 during a postback called by a Button control that is in the page (not in the custom control).
I also have a button inside the custom control that raises a postback like this
protected void btnUpload_Click(object sender, EventArgs e)
{
if (fuBannerfile.HasFile)
if (fuBannerfile.FileContent.Length / 1024 > this.Size)
;//code here not important
}
When this event is called the "this.Size" property is 0. I also noticed during debugging that during Page_Load of the page, if i access the property like this:
int size = customControlId.Size;
the property is set to 500. But after that when the debugger reaches the event inside the control the property is 0.
I am building a usercontrol which can display data with many flags. I would like to be able to able to declare it this way, or something similar to that from the asp.net page
<ctl:DisplayItem runat="server" id="ctlTest">
<flags>
<flagIsAvailable />
[code]...
I have setup my business object to have a create_date and edit_date members both datetime datatypes. My company want to display the create_date and edit_date fields in a gridview for each transaction. The problem i have is that after insterting a record it will have a valid create_date but no edit_date and when displayed in the gridview it defaults to datetime.minvalue (My default). How on earth do i show an empty field in my gridview for a null datetime field in the database?
I am using similar architecture to the Imar Spaanjaars example of a tiered solution. With a few small tweeks it has worked well for me for ages. I am passing a List<Database> to my object datasource which connects to my gridview.
I've created a UserControl with the following public property:
[Browsable(true)]
public string Text
{
get { return pnlLookupTable.GroupingText; }
set { pnlLookupTable.GroupingText = value; }
}
pnlLookupTable is, as you may have guessed, a Panel control. I can change the value of the Text property in the Properties window and it's reflected in the markup like it should be. However, the design view of the UserControl inside a page does not show updated GroupingText for the Panel. How can I get this to happen?
EDIT:
By request, here is the entire class to which that property belongs. You can see there's nothing special going on:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
[Code]....
And here's the relevant part of the .ascx file:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="LookupTable.ascx.cs" Inherits="LookupTable" %>
<asp:Panel ID="pnlLookupTable" runat="server" GroupingText="Lookup Table">
<%-- Irrelevant content here. --%>
</asp:Panel>
I have changed some identifiers and other trivial things to protect the proprietary nature of the code.
I should also reiterate that I'm looking at a Web form in design mode that has my control added, and I'm changing the Text property. I want to see the change to the Panel's GroupingText visually in the designer.
How could i set compulsory property of a user control to be set when user adds user control to form.
View 1 Replies
