Web Forms :: Passing Collection To User Control

Apr 28, 2010

I'm dynamically loading a user control from a for loop against a objects collection, eg.


I want to pass the following collection into the user control: oPerson.Address[i].listHistory (listHistory is a List of objects which I want to manipulate inside the usercontrol)

How can I pass this into the usercontrol so i can do this

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Adding To Page Control Collection From Inside A User Control?

Feb 12, 2011

I have an asp.net usercontrol which represents a "popup" dialog. Basically, it's a wrapper for the jQuery UI dialog which can be subclassed to easily make dialogs.

As part of this control, I need to inject a div into the page the control is used on, either at the very top or very bottom of the form so that when the popup is instantiated, it's parent is changed to this div. This allows "nested" popups without the child popup being trapped inside the parent popup. The trouble is, I can't find a safe way to inject this div into the page. A usercontrol doesn't have a preinit event, so I can't do it there, and calling Page.Form.Controls.Add(...) in Init, Load or PreRender causes the standard exception "The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases."

I thought I had found a solution by using...

ScriptManager.RegisterClientScriptBlock(Page, Me.GetType, UniqueID + "_Dialog_Div", containerDiv, False)

... which seemed to work well normally, but recently a coworker tried putting an UpdatePanel inside the dialog and now she's getting the error "The script tag registered for type 'ASP.controls_order_viewzips_ascx' and key 'ctl00$ContentBody$OViewZips_Dialog_Div' has invalid characters outside of the script tags: . Only properly formatted script tags can be registered."

How are you supposed to add controls to the pages control collection from inside a user control?

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Forms Data Controls :: Using GridView With A User Control And Passing Object Into Control?

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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Passing Parameter From One User Control To Another User Control In An Aspx Page?

Jun 3, 2010

have two user controls on one aspx page. UC1 has a grid which contains a link button column which user clicks. Based on the value of clicked cell, I need to show some data into UC2.How do I pass data from UC1 to UC2? How do I invoke a function of UC2 from UC1?

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Web Forms :: Passing A Querystring In User Control Tag?

Feb 12, 2010

Again, I am wondering why there is no one asking this kind of question. And may be my idea is wrong. Let's see the code:

<uc1:drilldown ID="drilldown1" runat="server" sType="F.W" rID='<%=request.querystring("r") %>' />
After it passed into my property in user control, the value is <%=request.querystring("r") %>

It is absolutely not reading my function!!

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.NET User Control List/collection/array Property

Jun 10, 2010

I created user control. It has string[] public property (it may be List<string> or whatever). I want to support defining this property in aspx code, when declaring the instance of this usercontrol. Something like this:

<uc1:MyControl ID="MyControl1" runat="server">
<string>My String 1</string>
<string>My String 2</string>

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Web Forms :: Passing Values From Web Page To User Control?

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 ........%>
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Web Forms :: Passing Values / Calling Functions To User Control?

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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Web Forms :: Passing Primary Key To User Control To Display Record Detail?

Aug 15, 2010

I'm building a user control to display detail information on a parent record. The user control will be displayed via an Ajax Modal Popup. The user control works and is displayed when expected. The problem that I'm having is that I'm not able to pass in the primary key for the parent. The control is displayed via the _ItemCommand event of a Repeater. In the markup for the user control, I explicity set the ContactId to 0 to avoid an error when the control loads (its still underdevelopment, eventually that I'll check if the value is valid).

I was assuming that I could change the property in the _ItemCommand event, but obviously its not working.In the Page_Load event this code successfully sets the ContactId property of the control. The _ItemCommand event appears to set the value. However when I set a test label on the user control to the Me.ContactId, its showing '0' as if it was never passed in.


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Forms Data Controls :: Passing Grid As A Property To User Control?

Aug 10, 2010

In my project, I need to create a user control to handle the sorting and pagination of all the grids in the application. The grid however will be different in different pages with different formatting.

I am able to do this by exposing a property from user control which takes gridview as the input.

then in page load, i bind this grid, and assign the sorting and paging event handlers to this gridview variable.

This way I am able to do the sorting and paging, but the problem is I have to bind the grid in all the post backs, and then in the sorting and paging events.

So when a user sorts, I have to bind the grid twice, once in page_load and then in sort event of user control.

I can store the first set of records in viewstate and bind that in page load, but is there any other way, so that i dont need to bind the grid in all post backs but only inside of not postback.

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Forms Data Controls :: Passing A Whole Object Through To The User Control Inside A Repeater?

Apr 16, 2010

I have a user control inside a repeater. I am binding a collection of objects to the repeater.

My user control has a public property to retrieve the object (setobject)

How do i pass each object through to the user control and not just the object property value? What is the syntax to do this?


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MVC :: Passing A Collection Of Objects To The View?

Apr 16, 2010

I'm trying to pass a list of items from a LINQ query to a View, but I'm having trouble figuring out how to resolve a type issue. Here's the error:

The model item passed into the dictionary is of type 'System.Data.Linq.DataQuery`1[Project.Models.Diagnostic]' but this dictionary requires a model item of type 'Project.Models.Diagnostic'.

The issue seems to originate with this code from my Controller:


I tried changing the IQueryable<Diagnostic> to var and got the same error. Also played around with something like:


But then VS2008 says that diagnostics could never be null, and that's may not the best (or even valid) way to do it.

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Passing Information From One User Control To Another?

Mar 9, 2011

I have a webpage having two user control uc1 and uc2. When user clicks a html server control on the page, i want to pass some property value of uc1 to uc2. How do i do that?

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MVC :: Passing Json Collection Object From View To Action

Nov 1, 2010

I am trying to send json data from view to controller action. But the issue is the data is not populating in the action parameter List<Score>.

View Model:
public class Score
public int QuestionId { get; set; }
public int PrevAnswerId { get; set; }
public int CurrAnswerId { get; set; }
public string CurrAnswerName { get; set; }

Json Data look like:
{QuestionId:1, PrevAnswerId:3, CurrAnswerId:3, CurrAnswerName:'Known to Broker'},
{QuestionId:2, PrevAnswerId:7, CurrAnswerId:7, CurrAnswerName:'Completed'},
{QuestionId:3, PrevAnswerId:10, CurrAnswerId:10, CurrAnswerName:'Report'}

On window load, I will construct the Json object using "eval()" function and do some operation in the data before its save. On Save Click, I will call the action through the ajax call.

url: url,
type: "GET",
dataType: 'json',
data: {score: ScoreJson},
contentType: "application/json; charset=utf-8",
success: function () {
error: function () {
} });

public ActionResult SaveScore(List<Score> score)
// do something...

But here score comming as collection of 3 elements with zero(for interger property)/null(for string property) values. When I checked in the request I found the data in "parama" property like.

"Score%5b0%5d%5bQuestionId%5d=1 &Score%5b0%5d%5bPrevAnswerId%5d=3 &Score%5b0%5d%5bCurrAnswerId%5d=3 &Score%5b0%5d%5bCurrAnswerName%5d=Known+to+broker&
Score%5b1%5d%5bQuestionId%5d=2 &Score%5b1%5d%5bPrevAnswerId%5d=7 &Score%5b1%5d%5bCurrAnswerId%5d=7 &Score%5b1%5d%5bCurrAnswerName%5d=Completed&
Score%5b2%5d%5bQuestionId%5d=3 &Score%5b2%5d%5bPrevAnswerId%5d=10 &Score%5b2%5d%5bCurrAnswerId%5d=10 &Score%5b2%5d%5bCurrAnswerName%5d=Travelers+Report&".

But I am not sure why it is not getting populated in the score list. One full day I spent for this issue but till now I didnt find the solution for this issue.

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Web Service - Passing A Base Object With List / Collection?

Apr 9, 2010

We need to create a simple web service in ASP.NET that can be called from PHP or other languages. This in turn will be used to update records in a database for an item submission.

The core part is fairly simple, we have a base set of fields for the object - first name, last name, birth date, city, etc. In addition however we need to accept a list of items associated with that object that can range from 0-n.

Jan 1 2009, ABC
May 1 2010, 123
Jun 30 2010, XXXXX

What would be the best way to structure this so it can be easily passed to the ASP.NET web service and processed as a single call for the entire object? Would passing the list of items as a single delimted string be a wise approach? Ex: Jan 1 2009, ABC|May 1 2010, 123|Jun 30 2010, XXXXX

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C# - Passing Reportparameter Array To Web User Control?

Jan 20, 2010

I have a user control that contains a reportviewer control.And I want to send an array of reportparameter to my user control.But I can't figure out how to do.I'm getting "Object reference not set to an instance of an object. ".My param_reportParam variable is null in usercontrol.My user control's parameter is like that ;

public ReportParameter[] param_reportParam [code]....

And a simple page that uses user control to show server reports is like that ;

ReportParameter[] parameters = new ReportParameter[4];//parameter number can be different
parameters[0] = new ReportParameter("imza", imzalayacaklar);
parameters[1] = new ReportParameter("Sayi_Son_Eki", "984");
parameters[2] = new ReportParameter("PersonelTip", "2");
parameters[3] = new ReportParameter("parafli", "1");
wuc_rapor_genel1.param_reportParam = parameters;//this is my usercontrol

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DataSource Controls :: Passing Object To ObjectDataSource.SelectParameters Collection

Mar 30, 2010

I'm trying to use an ObjectDataSource's SelectMethod() to retrieve a result set from a sql server database to populate a data table with various stored procs that have any given number of parameters. My approach is to pass an object which contains the stored proc name and information about its parameters into the SelectMethod(). My issue is that I don't know how to actually set the default value. Here is the code I have so far:

ObjectDataSource1.DataObjectTypeName = "WebApplication1.Children";
ObjectDataSource1.TypeName = "WebApplication1.Children";
ObjectDataSource1.SelectMethod = "Select";

Parameter odsParameter = new Parameter() { Name = "storedProc", Type = TypeCode.Object };

// How do you set the default value to reference an object?


namespace WebApplication1
public class Children
public DataTable Select(object storedProc)
// do stuff here and get db values.

The default value of a Parameter object is a string type. Does anyone know how to set the default value with an object or how I can pass an object into the SelectMethod?

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State Management :: Passing Querystring To User Control?

Aug 6, 2010

I have a aspx page and there is a web user control that must load dynamically with the data related to the aspx page....

ok so I want to use a querystring and pass it to the web user control.....how do I do this?

then also how do I pass a querystring from a web user control back to a aspx page?

This is a question I always had...and therefore never actually started to use the web user control

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Passing Session DataTables To A User Control Simply To Initialize Them?

Jul 30, 2010

I have one ASP.Net web page dynamically loading any one of about twenty User Controls at a given time. Since each user control is somewhat different, I've implemented the following extension to me pass a variable number of parameters to custom user control constructors: [URL]It, by the way, works very well! However, I've now come across the fact that both the web page and the user controls will need to share a few Data Tables. In other words, both the web page and the user control will need to access and manipulate data in these data tables.

To implement this fact I've used the Session object to store each data table. Each of these data tables starts out empty and then starts growing as the user enters more data into the user controls. The initialization of the data tables has to be done in the web page for a series of technical reasons that I won't get into here but rest assured that it does have to occur there.

But I found that in order to ENSURE that the initialization was taking place, it was simplest to just pass a reference to each data table as an extra parameter in the LoadUserControl call. This does work but it seems like overkill to me because on the user control constructor side, nothing is actually done with the data tables at the time of instantiation of the user control.

This made me go back to basics, thinking, "Why include a parameter if you're not actually going to use it?" But yet, it does seem to be the most straightforward way to ensure the data table is initialized and stored in the Session object.

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Passing Control ID From One Web User Control Into Another?

Jan 13, 2010

I have a Web User Control that holds many others User Controls. I'd like to name those embedded controls based on the ID of the parent user control.

I'm trying this code inside the main User Control:

<myLibrary:myChildUserControl1 ID="<%=ID%>" runat="server" />


<myLibrary:myChildUserControl2 ID="<%=ID%>_OkButton" runat="server" />

In both cases I get a compiler error.

Note that I have no problem assigning the control ID to regular HTML elements. The following code works well:

<div ID="<%=ID%>" >

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AJAX :: Passing Property Values From Server To Client In A User Control ?

Aug 13, 2010

I have a user control which has some properties configured on it. I need to access (actually, only read) the values of those properties on the client. I have done it like this.

Code behind:




That works but, at the back of my mind, I'm sure I've seen a neater way of doing it, although I suspect that may have been on an Extender not a User Control. Pointers on that welcome.

Also, related to that, the User Control itself has an Id which becomes part of the name of all visual objects included within it. However, the User Control is not a DOM element in its own right (because it has no visible rendering) which [I think] means that I have to attach properties to one of the visible elements within it, and not to the control itself?

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Custom Server Controls :: Passing Reportparameter Array To Web User Control?

Jan 20, 2010

I have a user control that contains a reportviewer control.And I want to send an array of reportparameter to my user control.But I can't figure out how to do.I'm getting "Object reference not set to an instance of an object. ".My param_reportParam variable is null in usercontrol.My user control's parameter is like that ;

[Browsable(false)]public ReportParameter[] param_reportParam{ get { return _param_reportParam; } set { _param_reportParam = value; }}private ReportParameter[] _param_reportParam;

And a simple page that uses user control to show server reports is like that ;

ReportParameter[] parameters = new ReportParameter[4];//parameter number can be different parameters[0] = new ReportParameter("imza", imzalayacaklar); parameters[1] = new ReportParameter("Sayi_Son_Eki", "984"); parameters[2] = new ReportParameter("PersonelTip", "2"); parameters[3] = new ReportParameter("parafli", "1"); wuc_rapor_genel1.param_reportParam = parameters;//this is my usercontrol

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Web Forms :: Passing Values From Parent Page To User Control And Maintaining The Values Added

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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Web Forms :: Determining User Agent From A Collection?

Aug 19, 2010

I am currently using Request.Useragent.Contains("string1") and if string1 matches with my useragent i am writing it on to the page, now I have to check with a collection ( array or list or ..) which contains {"string1","string2","string3"} and Response.write the useragent if the Request.useragent contains any of the strings collection (string 1,2,3). I am unable to detemine this and if i use a list or array, i am getting a "cannot convert from string[] to string" exception when i use it with Request.Useragent.Contains.

If there is a better way of achieving this, let me know. Its important.

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Forms Data Controls :: Finding A Control From A Control Collection?

Aug 24, 2010

I'm trying to write a bit of code that will format all the numeric values in lables in my gridview. here's what i am doing right now:On the RowDataBound Event, i create a row object for the row that is currently being bound.then i go use the FindControl method to grab each label by name.Problem is there's too many columns in this table and i really dont wnat to have to type it all out. Here's an example of what i am currently doing


Can i use myRow.Controls to grab a list of all the controls and then somehow get a list of all labels in the collection and then use a for loop to go through and format each label?

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