Forms Data Controls :: Get The Values In The User Control?
Feb 4, 2010
I'd made a WebUserControl called Matrix, this UC inherits from the Gridview control. The Matrix User Control has 9 properties, which of 3 properties are the DataSources DataTables). The 3 DataSources are the RowSource, ColumnSource and DataSource. Together they form an gridview with labels (name of column) at the header of each column, a abel (name of row) at each first cell of a row and rest of the cells on each row are checkboxes. This forms a kind of Matrix, that's why I named it so.
I drag the Matrix User Control on a new .aspx page, for example Index.aspx. In the Page_Load event I set the 3 DataSources and DataBind the Matrix Control. Then the Matrix is build up correctly.The user can now edit the gridview by checking or unchecking the checkboxes. I also have a 'Save' button on the page which has an ID 'cmdSave' to save the changes.What I wanna do is: I want to have a Method within the User Control which gives me back a list of checkboxes which are checked. But when the OnClick event of the cmdSave button is fired, the data of the User Control is null/empty. And how do I get the changedHow can I fix this and build a method which gives me a list of checked checkboxes?If not everything is explained clearcly,
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Nov 10, 2010
I have a ObjectDataSource and a ListView referencing it.
I have created a Templated User Control (see:
http://msdn.microsoft.com/en-us/library/36574bf6.aspx) and placed it in the ListView's InsertItemTemplate
It has one template <ContentTemplate>. Inside that template, I've defined a couple of server controls with their properties = '<%# Bind("colName") #>'.
See below:
[Code]......
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Dec 1, 2010
I am developing an application in which I have to use a User Control.I have created a user control in which I am using
- A Label (whose text will be dynamic)
- 3 Textboxes (whose values will be also dynamic).
So far everything is working fine.Now I used this user control in a aspx page and at the page_load i have to loop thru all the instance of this user control and assign values to them and here the problem begins.The values are not being assigned to the controls.
Here is the code which i have written to loop thru User Control instances and assign values to them.
[Code]...
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Mar 18, 2011
I wanted to know if we can pass values from Parent page (in this case from Default.aspx page) to the user control and maintain those values on subsequent "Add/Load" of user control.
So in short, if I click the "Add" button it loads my "webusercontrol" and also I am able to pass my default.aspx dropdownlist value to this dynamically loaded user control and assign it to a "Label or Textbox" which resides in my "webusercontrol", now the problem is that the value doesn't persists! What I meant is , when I click "Add" button again the "webusercontrol" gets loaded again perfectly but now all my "Label's" in webusercontrol has the new selected value from the default.aspx dropdownlist.
So say for instance I have a Dropdownlist in Default.aspx page with Values "Apple, BlackBerry, Nokia" and initial value to be passed is "Apple", I click the "Add" button, now my "Label" inside webusercontrol has the value "Apple", perfect! Next when I click "Add" button again and select a different value to be passed this time say "BlackBerry" now I have 2 webusercontrol loaded on the page, so that means I have 2 "Labels" with different ID's, but now my first Label initially had the value "Apple" because that's what I had passed and now when I passed the value "Blackberry" both the labels of my webusercontrol has the value "BlackBerry" instead of one being "Apple" and another "BlackBerry"
Is there a way to resolve this issue? may be Dictionary List?
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Apr 2, 2010
I have a repeater that I have bound to a sql reader via my code behind page.
However I can't figure out how to populate the controls in my repeater in my code behind code.
At the moment I am having to specify the database field e.g productprice with the control in the .aspx page like this
<asp:Label ID="LabelUnitPrice" runat="server" Text='<%# Eval("productprice") %>'></asp:Label>
I would rather specify fields in my code behind than embedding them in the .aspx page.
I also have a subtotal label control in my repeater that I would like to populate its text property by mutiplying two of the database values e.g productprice * unitprice shown in my repeater.
I need to do this in code behind, looping through the repeater. Any idea of how I can do this in C#?
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Mar 8, 2011
I am trying to bind upto 3 values to a HyperLink control in a DetailView control to create a query string but it does not seem to work.
Following is my code for the HyperLink:
[Code]....
The parameters UserName, FirstName and LastName are column names from the sqldatasource.
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Mar 17, 2010
I am creating a new setup page where I am trying to have a user add new setup values. These values have a unique identifier id (like HEAD01, HEAD02 and so forth - which happens to be the primary key in that record) which I have to generate using code.
Here I am trying to use a detailsview object with the New/Update/Delete option.
Here if the user Chooses to Add a new value, I need to determine the next unique identifier for this new value to be added (say HEAD16) by looking at the last generated number in that table and have this new value added in the database. The user should not be able to give this primary key value manually it should be autogenerated by code.
I am using SQLDataSource with Detailsview to add update values.
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May 15, 2010
i have a multiple user controls, each user control has multiple properties, i am loading those controls dynamically in my aspx page,i save the user control name in a hidden field in my aspx page,so i can know whats usercontrol are currently loaded,now i want to set/get some values for Currently user control properties,how can i know the properies available for that dynamics loads control ?also how to know the class for that control ?
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Apr 21, 2010
I have got One Problem I have one aspx there are two user control usercontrol are inside in multiview and there is two option in each user control previous and next when we click previous then all data are removed i want to preserve all value of each control i have also done enable viewstate=true. plz give me a innovative idea. or suitable post
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Feb 18, 2010
I have a user control that i add at run time like:
PlaceHolder1.Controls.Add(mycontrol) because i want to make it appear when i click Checkbox control
Checkbox_changed IF CheckBox2.Checked THEN
PlaceHolder1.Visible = TRUE
The problem is that i want to get values from the page and use them within User Control page
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Feb 17, 2011
I have EntityDataSource for DetailsView which is in Edit mode by default (showin Update, Cancel link buttons).
This datasource also has foreign key called PecID. If I change the value in textbox bound to PecID, it works fine.
Entering IDs is not very user friendly, so I add dropdownlist and new datasource.
When I select new value from dropDownList and press update the DropDownList's selection is restored to original (previous) value.
Other values in textboxes are saved as expected.
After few hours of trying to figure out what is going on, I got lucky. I figure out that it is important the order of TextBox and DropDownList in field template.
This is the working order (textbox before DropDownList)
[Code]....
This one doesn't work [Code]....
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Jun 17, 2010
I have a simple user control which toggles between the visibility of a few images depending on the UserId. When the page is loaded for the first time, the userID is being assigned correctly (I'm debugging). However, there are two other buttons on the page for filtering the type of users, they are perform their functionality via Ajax (not the toolkit, but the normal javascript ajax) When one of these buttons are clicked, the user control cant get the userid, it always comes up as Zero. Oh, btw, the usercontrol is in a DataRepeater, so it occurs for each of the user.. all the time.. or thats the Idea. I have several other pages like this, (none of them have ajax) and the user control has no problems whatsoever.
My User control code:
[Code]....
And the Data Repeater is something like this:
[Code]....
Here, Immediately after the userControl <ucAB:....> line, I am printing the userid just to see if its valid (by <%# Eval("UserId") %> and the user id's are valid too. I dont understand why the User Control cant pick it up on ajax postback?
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Mar 10, 2010
I am exposing state_v value by using property in aspx.vb page..How can I create an instace of the page in User control to access this property...mypage.aspx
<%@ Register ........%>
<div>
<asp:dropdownlist ID="ddl" runat="server"></asp:Dropdownlist>
[code]...
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Jan 7, 2011
I have a page that contains a few user controls which all use an id in a querystring. I want to change this so that the page can send the id to the user control and can call a function on the user control.
Also is it possible for the user control to get the id from the page or a control on the page as its parent?
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Jun 9, 2010
I'm constructing a User Control that will have one Property called "ContractIdx". Here's how I've constructed this Property:
public int ContractIdx
{
get
{
return Convert.ToInt32(this.Attributes["ContractIdx"]);
}
set
{
this.Attributes["ContractIdx"] = value.ToString();
}
}
I'm initially loading the User Control by passing a parameter to it and setting ContractIdx accordingly. That all works fine.
Upon Postback though I'm loading the User Control without any parameters and then setting its ID property to what it was before the Postback. My understanding was that if I did this then ViewState would properly restore everything. Yet apparently this is not the case with the "ContractIdx" attribute.
Where am I mistaken in my understanding? How should I change things to get this mechanism to work?
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Dec 14, 2010
(using c# and .NET 2008):
I have a main web page and added a user control inside it. The user control has some textboxes. The problem I have is when I populate the textboxes with the data that is in the DB, they do not show the values. The strange thing is If I change the property of textboxes ReadOnly to TRUE, they show the values. The problem is that I need them to be ReadOnly=FALSE.
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Jan 8, 2010
I would like to use the gridview paging feature and have built a gridview with a user control. The data source has lots of columns, so to make it easier I want to return a LIST<MyObject> and just pass <Myobject> into the user control rather than all the data elements. Not sure how I access the object of the data source to bind to the control. Assume it would be during ondatarowbound.
Also, my guess is there is a better way to do this than gridview. I'd take either solution that allows me to have easy paging and pass the complete object into the user control
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Sep 28, 2010
I have a gridview with a dropdownlist (ddlGrade) in one column and a textbox (txtText) and checkbox(cbxCheck) in another. When the checkbox is checked I to fire an event that will use the data from other controls in that row. In the method can get the checkbox value using:
public void onCheckedChanged_CheckedInfo(object sender, EventArgs e)
{
Checkbox cbxChecked = (Checkbox)sender;
}
how do I get the value of the other two controls that are in the same row (dropdownlist and the textbox) at the same time? But not the values from any other rows?
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Feb 1, 2011
i have two user controls uc1 and uc2. uc1 as button and uc2 has label, so default.aspx contain both uc1 and uc2, How can i change value of label by clicking on button??? remember both are in the different user control.
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Oct 7, 2010
User control can not be added in to toolbox,Unless or until it is changed into custom control.(VS 2005.) Once i have changed user control into custom controls(Composite Controls,WebControls,Controls) then i can add it into tool box. These statement are correct?. or is there any possibility to add usercontrol in toolbox?
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Sep 7, 2010
I have a calendar control where a user selects a date and then inputs info into a FormView control. Underneath the FormView is a GridView that shows all data from the SelectedDate on the calendar control. However, when the date is selected, all the information from the table ( from all dates ) is displayed.
[Code]....
And the code behind:
[Code]....
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Aug 29, 2010
I have a web form and I have a user control on it. This user control contains a panel with some user properties that are to be stored in a database. So far nothing fancy. The user control itself contains a panel and is working fine (all code to retrieve and store the values is working).
I used the default settings of creating a user control and one of them was AutoEventWireup=true. This works fine because I also have some dropdown boxes (and other fields) that need to be filled with values from the database and that happens in the Page_load event.
The panel specifies the 'DefaultButton' which calls a method when clicked to save the values after the user has changed them.
On this click the code of the method is called, I confirmed that, but I found out that the values of my controls on the user control (for example the Textbox control) are empty. As a non-ASP.NET developer I couldn't figure out why. So I changed some settings like AutoEventWireup to false.
Off course this resulted in my dropdown boxes no longer to be initially filled, but my surprise was big to find out my controls actually contained the values the user typed in.
Logically I need both the values and the dropdowns filled, but for now it seems one or the other.
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Jan 11, 2011
I can't find how to set font-style for titles on x and titles on y axes in the chart control? This titles are values, that are bind to chart control from database.
I tried this, but it only changes font-style for values on the top of each column.
[Code]....
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Feb 16, 2011
Im developing a web application. I've to create a grid view which displays the brand and model of Mobile handsets. In edit template i've added a dropdown list box for brand and model. The user have to select brand, the model dropdownlist should display its respective model names of the selected brand. How to accomplish it..
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Jun 4, 2010
I don't think I understand fully how ASP.NET does inheritance of controls.I have a user control, ucBase, which has an asp.net label in the ascx file. Code behind references the label and it works fine during run time if the control is not a parent for another user parent.
If I have another user control, ucChild, inheriting from ucBase, the label in ucBase's code is always null. ucChild has no controls in its ascx fileThe server controls (like the label) needs to be declared in the ascx file and not created programmatically.What needs to be done for ucBase to see its own controls when it's a parent user control?
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