Search results matching tag 'usercontrols'

generate onClientClick in Render(HtmlTextWriter writer)

mhtan88 — Mon, 19 Oct 2009 04:00:00 GMT

Hi all,

I'm writing a "toolbar" component below is one of my button 's example.

- The question is, I want to generate out the onclientclick event in this function. But onclientclick is not available in HtmlTextWriterAttribute. May I know how am i going to code it?

- second question is, if I want to public out this compoent's "add button" able to access from outside like example:

toolbarcomponent.BtnAdd;

how am i going to do it? because the render is only render out in html, but i can't access it.

protected override void Render(HtmlTextWriter writer)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "button");
            writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID + "_tb_add");
            if ((bool)ViewState["AddDisable"])
                writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "true");
            writer.AddAttribute(HtmlTextWriterAttribute.Value, addText);
            writer.AddAttribute(HtmlTextWriterAttribute.Width, "100");
            writer.AddAttribute(HtmlTextWriterAttribute.Src, "/Images/add.ico");

            writer.AddAttribute(HtmlTextWriterAttribute.Onclick, Page.GetPostBackClientEvent(this, "OnAddButtonClick"));
            writer.RenderBeginTag(HtmlTextWriterTag.Input);
            writer.RenderEndTag();

base.Render(writer);
}

Thank you

Regards,

TanMH

How to add Data from Datalist to another Datalist just selecting data of datalist.

Satyadonta — Tue, 14 Jul 2009 04:00:00 GMT

Hi,

Iam want to move data from one datalist on selecting a particular data to a listbox or new datalist without postback the page using c# language.

Parser Error Message: The file '/UserControls/MyCustomControl.ascx' does not exist.

dso808 — Tue, 09 Jun 2009 04:00:00 GMT

I have a custom control stored in a folder - "~'/UserControls". In an aspx page, I use the control as follows:

<%@ Page Language="C#" MasterPageFile="~/master/tools.master" Title="PCNS Implementation Request /Problem Ticket System" %>

<asp:Content ID="Content1" ContentPlaceHolderID="main" Runat="Server">

<user:TitleBanner

id="TitleBanner1"

Runat="Server" />

</div>

</asp:Content>

In my web.config file, I add the custom control like so:

</controls>

But when I run the page, I get the parser error message stating that the control can't be found. Please help! Thanks!

Help With UserControls and MasterPages

mutlyp — Tue, 09 Jun 2009 04:00:00 GMT

I have created a UserControl that has 2 textboxes in it. I then drag and drop the UserControl inside a webpage that is attatched to a MasterPage. I need to access the UserControl's textbox text values in the code behind on the webpage.

Here is the code that I am useing:

Dim emp As New cls21_Receive

emp.RecGetInfo(Me.uc21_CRPChemMat1.txtCRP.text)

cls21_Receive is a class I created that has a method in it called "RecGetInfo"

uc21_CRPChemMat1 is the unique id given to the UserControl when it was dropped in the webpage

txtCRP is the textbox inside the user control that I need to access it's text value.

I get an error on "Me.uc21_CRPChemMat1.txtCRP.text" on the line:

emp.RecGetInfo(Me.uc21_CRPChemMat1.txtCRP.text)

The error reads "UserControls_ElSegundo21_uc21_CRPChemMat.Protected WithEvents txtCRP As System.Web.UI.WebControls.TextBox' is not accessible in this context because it is 'Protected'."

UserControls/ElSegundo21/uc21_CRPChemMat is the path to the UserControl in my project.

Don't know how to "Un-Protect" or should I do it another way.

Please help

Thanks

MutlP

Help With UserControls and MasterPages

mutlyp — Tue, 09 Jun 2009 04:00:00 GMT

Here is the code that I am useing:

Dim emp As New cls21_Receive

emp.RecGetInfo(Me.uc21_CRPChemMat1.txtCRP.text)

cls21_Receive is a class I created that has a method in it called "RecGetInfo"

uc21_CRPChemMat1 is the unique id given to the UserControl when it was dropped in the webpage

txtCRP is the textbox inside the user control that I need to access it's text value.

I get an error on "Me.uc21_CRPChemMat1.txtCRP.text" on the line:

emp.RecGetInfo(Me.uc21_CRPChemMat1.txtCRP.text)

The error reads "UserControls_ElSegundo21_uc21_CRPChemMat.Protected WithEvents txtCRP As System.Web.UI.WebControls.TextBox' is not accessible in this context because it is 'Protected'."

UserControls/ElSegundo21/uc21_CRPChemMat is the path to the UserControl in my project.

Don't know how to "Un-Protect" or should I do it another way.

Please help

Thanks

MutlP

Re: Delegates and Events + User Control

abhishek_22m — Wed, 03 Jun 2009 04:00:00 GMT

i have declare delegate for button click like

public delegate void Click();

public event EventHandler ButtonHandler;

and on button click i wrote

if (ButtonHandler == null)

ButtonHandler(sender,e)

but every time i get error:

Object reference not set to an instance of an object.

please tell me how to declare it so that it could not receive null.

thanks

How to refresh a usercontrol

nikky_t — Thu, 28 May 2009 04:00:00 GMT

I have a usercontrol which displays google traffic with zip code search. The problem is it loads the map on load and doesnt display the map when I try to search with a new zip code. I am calling a javascript function to load the google traffic info. I have debugged the code it gets the map info but doesnt display.

Could anybody help me on this please.

Designer data binding in an ITemplate on a custom databound composite control

TerenceK — Sat, 23 May 2009 04:00:00 GMT

Hi all,

I am currently preparing to build a custom databound composite control. Everything seems to work well except that when i drop a text box into the ItemTemplate i do not get the smart tag on the textbox with an action to edit the databindings.

Let me see if i can break it down.
I have the following person class that i am using for a datasource.

[DataObject(true)]
public class Person {

    [DataObjectField(false, false, false),
    Bindable(true)]
    public string Name { get; set; }
    [DataObjectMethod(DataObjectMethodType.Select,true)]
    public IList<Person> GetPeople()
    {
        return new List<Person>() { new Person() { Name = "Person1" }, new Person() { Name = "Person2" } };
    }
}

I then have a container for the ItemTemplate as follows:

public class SimpleDataItem : Control , IDataItemContainer
{

    public SimpleDataItem(object dataItem, int itemIndex)
    {
        this.dataItem = dataItem;
        this.dataItemIndex = itemIndex;
    }

    private object dataItem;
    private int dataItemIndex;

    #region IDataItemContainer Members
    public object DataItem
    {
        get { return dataItem; }
    }

    public int DataItemIndex
    {
        get { return dataItemIndex; }
    }

    public int DisplayIndex
    {
        get { return dataItemIndex; }
    }
    #endregion
}

And then the control itself:

[Designer(typeof(SimpleTemplatedControlDesigner))]
public class SimpleTemplatedControl : CompositeDataBoundControl

    private ITemplate itemTemplate;
    [PersistenceMode(PersistenceMode.InnerProperty),
    TemplateContainer(typeof(SimpleDataItem),BindingDirection.TwoWay)]
    public ITemplate ItemTemplate
    {
        get { return itemTemplate; }
        set { itemTemplate = value; }
    }

    protected override int CreateChildControls(System.Collections.IEnumerable dataSource, bool dataBinding)
    {
    int count = 0;
    if (dataBinding)
    {
        foreach (object dataItem in dataSource)
        {
            if (ItemTemplate != null)
            {
                // create instance of SimpleItem control
                SimpleDataItem item = new SimpleDataItem(dataItem, count++);
                // instantiate in new item object
                ItemTemplate.InstantiateIn(item);
                // add item to Controls collection
                this.Controls.Add(item);
                // need to support <%# %> expressions
                item.DataBind();
            }
            // add a break between each item
            this.Controls.Add(new LiteralControl("<br />"));
        }
        this.DataBind(false);
    }
    return count;
    }
}

The following designer is implemented for the control:

public class SimpleTemplatedControlDesigner : DataBoundControlDesigner
{

    public override void Initialize(System.ComponentModel.IComponent component)
    {
        base.Initialize(component);
        base.SetViewFlags(ViewFlags.TemplateEditing, true);
    }

    public override TemplateGroupCollection TemplateGroups
    {
        get
        {
            TemplateDefinition tempDef = new TemplateDefinition(this, "Item Template", Component, "ItemTemplate");
            TemplateGroup tempGroup = new TemplateGroup("Item Template");
            TemplateGroupCollection groupCol = new TemplateGroupCollection();
            groupCol.Add(tempGroup);
            tempGroup.AddTemplateDefinition(tempDef);
            return groupCol;
        }
    }
}

The control is then added to a page with an object datasource as follows:

<cc1:SimpleTemplatedControl ID="SimpleTemplatedControl1" runat="server" DataSourceID="ObjectDataSource1">
    <ItemTemplate>
        <asp:Label ID="labelTemp" runat="server" Text='<%# Eval("Name") %>'></asp:Label>
        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
        <hr />
    </ItemTemplate>
</cc1:SimpleTemplatedControl>

<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" OldValuesParameterFormatString="original_{0}" SelectMethod="GetPeople" TypeName="SimpleTemplatedControlSite.Person"></asp:ObjectDataSource>

All this creates a simple control that supports the designers databinding with the ObjectDataSource perfectly, however when editting the ItemTemplate i am expecting to see a smart tag on the label and texbox controls to edit their data bindings as shown below in the forms view edit template. The Eval and Bind expressions work perfectly at runtime.

My demo project can be downloaded here.

Any help would be appreciated.

Thanks Terence

Best practice with User Controls and Model

eLad — Tue, 19 May 2009 04:00:00 GMT

I'm wondering if ASP.NET has out-of-the-box best practice for user controls in a manner of their model.

Assuming I have a Menu.ascx of type ViewUserControl<IEnumerable<Product>>. The intention is quite clear: I need to loop thru the products and put a link for each.

This Menu.ascx should appear in a MasterPage (or just inside my views) on all of my pages.

Where should I fetch this data? I can think of 3 options:

1. Inside every Action in my controller I can fill ViewData/Model with the products for menu and ask for this data from within the Menu.ascx

2. Maybe, if that's possible, I can make an ActionFilter that can inject this data to each action I assign it to.

3. Fetch the data from the ascx.cs (calling the Model)

I really don't like any of these.

The first makes me to duplicate code

The second seems ugly. What if tomorrow my view won't have this Menu.ascx rendered? The data will be sent anyway?

The third is pretty awful. If I use it, than I lose all the MVC method. What if this UserControl is bigger than just a menu, and in another page I have it as my whole view? How it can use, then, a controller?

So, I heard about a thing called Sub-Controller, this *sounds* like what I need. Is there anything like it on the ASP.NET MVC core? Or should I look into other libraries like MVCContrib?

And If there was no library, how would you solve this pattern?

Thanks.

Need advice on proposed solution concerning master-detail user controls

Rene.B — Tue, 05 May 2009 04:00:00 GMT

LS,

I have a dataset with a number of products that I want to display and edit in a grid. Before displaying the products I want to set some filters by means of some dropdownlists that are dynamically filled with some of the products characteristics.

Because I want the same functionality on different pages my idea was to create a user control 'ProductControl' that itself hosted two other user controls 'ProductSelect' and 'ProductEdit'. 'ProductSelect' contains the dropdownlists and 'ProductEdit' contains a gridview with dynamic added columns depending on the size of the dataset. When the user selects different characteristics on the 'ProductSelect' control, the 'ProductEdit' control should be updated to reflect the proper products.

I have a couple of questions about the proposed solution:

1) Is this the right way to go?

2) To avoid unneccesary DB calls I would like to hold the dataset on the 'ProductControl' control and reference this from both the other controls.How can this be done?

3) To dynamically add columns depending on the size of the dataset;
a) where would I create this columns? In Page_Init, Page_Load or...
b) Should I recreate them on every request?
c) How would I get the updated data from the dynamically added columns?