Develop Reference

BackColor in codebehind only changing color directly around text

So I have a list view with a C# code behind. I'm attempting to set the background of the cell if the value of JobsCovered is > 1000 (for example) in my code behind. But instead of setting the background color of the entire cell, it only sets the background immediately around the text only. I have to be missing something very simple.
HTML:
<ItemTemplate>
<td runat="server" style="background-color:black;color: white;text-align:center;">
<asp:Label ID="PartDescriptionLabel" runat="server" Text='<%# Eval("PartDescription") %>' />
<br />
<asp:Label ID="PartNumberLabel" runat="server" Text='<%# Eval("PartNumber") %>' />
<br />
<div id="JobsCoveredBox" style="height:60px; line-height:60px">
<asp:Label ID="JobsCoveredLabel" runat="server" Text='<%# Eval("JobsCovered") %>' />
</div>
</td>
</ItemTemplate>
Code Behind:
protected void RepackOSR_ItemDataBound(object sender, ListViewItemEventArgs e)
{
// Retrieve the current item.
ListViewItem item = e.Item;
Label JobsCoveredLabel;
// Verify if the item is a data item.
if (item.ItemType == ListViewItemType.DataItem)
{
JobsCoveredLabel = (Label)e.Item.FindControl("JobsCoveredLabel");
System.Data.DataRowView rowView = e.Item.DataItem as System.Data.DataRowView;
//Store the value of "JobsCovered" from data source
Int32 currentJobCovered = Convert.ToInt32(rowView["JobsCovered"].ToString());
if (currentJobCovered > 1000)
{
//Why won't this change the entire background of the cell?
JobsCoveredLabel.BackColor = Color.Green;
}
}
}
It only does this...
Not the entire background

You want of course to color the div background I assume?
thus you need to tag the div as server control.
So, try this:
<div id="JobsCoveredBox" runat="server" style="height:60px; line-height:60px">
So, now we can grab/get the div say like this in your row data bind event
HtmlGenericControl mydiv = (HtmlGenericControl)e.Item.FindControl("JobsCoveredBox");
mydiv.Style.Add("background-color", "aliceblue");

Is there a simple way to call a method used to change display from a parent control?

I am trying to create a page using Ajax Tabs and user controls. The .aspx page contains a reference to a default control
<%# Register src="~/Controls/DefaultControl.ascx" tagname="DefaultControl" tagprefix="uc1" %>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<uc1:DefaultControl ID="DefaultControl1" runat="server" />
<%--<uc2:CorrespondenceControl ID="CorrespondenceControl" runat="server" />--%>
</asp:Content>
And the DefaultControl.ascx is using Ajax Tabs, one of which contains a child control within an Update Panel
asp:TabPanel ID="tbpnl2" runat="server" HeaderText="Tab With GridView with select buttons" Visible="True">
<ContentTemplate>
<asp:UpdatePanel ID="updpnl2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<uc2:Control1 ID="Control1" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
</ContentTemplate>
</asp:TabPanel>
The DefaultControl holds a method in the code behind page which is successfully called directly from other tabs (with the markup contained directly in DefaultControl.ascx) on the DefaultControl.ascx page to change the display when Select is clicked on a gridview -
public void ShowPage()
{
gv1.DataBind();
fv1.DataBind();
tbpnl1.Visible = true; //show details tab
tbpnl2.Visible = true;
tab1.ActiveTabIndex = 1; //set details tab as current tab
txt.Text = String.Empty;
updPnl1.Update();
}
I am trying to call this method from the child Control1 when Select on a gridview is selected there, but obviously none of the elements referenced are in Control1.
I have been searching for a way to be able to use the existing method and have seen a number of suggestions including Interfaces, references like ((DefaultControl)this.DefaultControl).ShowPage(); on the code behind Control1
But as I am just starting to program I have no idea how to implement any of these solutions or what the syntax should be to get them to work.
Is there a simple, even if dirty, way to use the method from a parent control in a child control contained in an Ajax tab?

Not sure if this is what you are looking for... Below example shows calling of direct UserControl and nested UserControl method's from Web page
Default.aspx
<%# Register TagPrefix="uc" TagName="WebUserControl" Src="WebUserControl.ascx" %>
<%# Register TagPrefix="uc2" TagName="WebUserControl2" Src="WebUserControl2.ascx" %>
<form runat="server" id="form1">
<uc:WebUserControl ID="control1" runat="server" />
<hr />
<h4>
At Default.aspx</h4>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Call the function" />
</form>
Default.aspx.cs
protected void Button1_Click(object sender, EventArgs e)
{
control1.CallMe();
var control2 = (WebUserControl2)control1.FindControl("control2");
control2.CallMe2();
}
WebUserControl.ascx
<%# Register TagPrefix="uc2" TagName="WebUserControl2" Src="WebUserControl2.ascx" %>
<div runat="server">
<h3>
WebUserControl</h3>
<asp:Label ID="lbl1" Text="I am ready at WebUserControl" runat="server"></asp:Label>
<div runat="server" id="toAdd" style="color: Red;">
</div>
</div>
<hr />
<uc2:WebUserControl2 ID="control2" runat="server" />
WebUserControl.ascx.cs
public void CallMe()
{
Label lbl = new Label();
lbl.Text = "I am at WebUserControl";
toAdd.Controls.Add(lbl);
}
WebUserControl2.ascx
<div runat="server">
<h3>
WebUserControl2</h3>
<asp:Label ID="lbl1" Text="I am ready at WebUserControl2" runat="server"></asp:Label>
<div runat="server" id="toAdd" style="color: Red;">
</div>
</div>
WebUserControl2.ascx.cs
public void CallMe2()
{
Label lbl = new Label();
lbl.Text = "I am at WebUserControl2";
toAdd.Controls.Add(lbl);
}
Hope it helps someone...!!

Asp.net repeater control with checkboxlist

Binding data to checkbox list inside a repeater controls ItemDataBound event.
Here is Aspx code:
<asp:Repeater ID="rptrSelectedRcds" runat="server">
<ItemTemplate>
<div id="groupsDiv" runat="server">
<div class="hidden" id="divGroupSelector" runat="server">
<asp:CheckBoxList runat="server" ID="chkLstGroups"
RepeatDirection="Vertical">
</asp:CheckBoxList>
</div>
<asp:Button ID="btnConfirmGroups" runat="server" Text="Confirm" />
</div>
</ItemTemplate>
</asp:Repeater>
Code used inside ItemDataBound to bind data to repeater control:
protected void rptrSelectedRcds_ItemDataBound(object sender, System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
Int32 iProviderID = Convert.ToInt32(((Label)e.Item.FindControl("lblIndividualID")).Text);
HtmlGenericControl selectGroupsDiv = (HtmlGenericControl)e.Item.FindControl("divGroupSelector");
if (divGroupSelector != null)
{
CheckBoxList chkLstGroups = (CheckBoxList)e.Item.FindControl("chkLstGroups");
chkLstGroups.DataSource = GetStateGroupsByProvider(stateValue, iProviderID);
//This code line gives different values for each record
chkLstGroups.DataTextField = "Name";
chkLstGroups.DataValueField = "pkID";
chkLstGroups.DataBind();
}
}
I can see in firebug the ids for chkLstGroups are different, but values bind to it are same.I want different values for each different checkbox id generated as from method - GetStateGroupsByProvider
Please help me out..!
Thanks.!

ASP/C#, adding text to textbox problem

For some reason, I cannot get text into any textbox or label!
I'm using Master pages and the code is going in the code behind view. I have created the textbox:
<asp:Textbox ID="whatever" runat="Server">
When I want to add some text I simply add the code in the code behind view like:
whatever.Text = "myText";
I get an error that says:
"System.NullReferenceException:Object reference not set to an instance of an object"
hightlighting this line in red: whatever.Text = "myText";
I guess its because it saying it not there but how can it let me reference the textbox?
Apologies if the answer is on the site, I have searched but found nothing. :)
This is my code in Basket.asp - I've changed the textbox to a label, it's called bskItems
<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder3" runat="server">
<asp:Label ID="bskItems" runat="server"></asp:Label>
<div id="cart">
<asp:Button ID="btnCheckout" CssClass="BasketBtnAdd" runat="server" CommandName="checkout" Text="Checkout" />
</div>
</asp:Content>
This is my masterpage, where I'm using a loginView. ContentPlaceHolder3 is where the textbox should be. I only want it to display a count of items.
<asp:LoginView ID="loginView" runat="server">
<LoggedInTemplate>
<asp:LoginName ID="loginName" runat="server" FormatString="Hi, {0}!"/>
(<asp:LoginStatus ID="loginStatus" runat="server" />)
<%
if (HttpContext.Current.User.IsInRole("Admin"))
{
%>
<asp:SiteMapDataSource ID="admin" SiteMapProvider="admin" runat="server" ShowStartingNode="false" />
<asp:Menu ID="Menu" runat="server" DataSourceID="admin">
<StaticItemTemplate>
<%# Eval("Text") %>
</StaticItemTemplate>
</asp:Menu>
<%
}
if (HttpContext.Current.User.IsInRole("Users"))
{
%>
<asp:SiteMapDataSource ID="user" runat="server" SiteMapProvider="user" ShowStartingNode="false" />
<asp:Menu ID="Menu1" runat="server" DataSourceID="user">
<StaticItemTemplate>
<%# Eval("Text") %>
</StaticItemTemplate>
</asp:Menu>
<%
}
%>
<asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server"></asp:ContentPlaceHolder>
<asp:ContentPlaceHolder ID="ContentPlaceHolder3" runat="server"></asp:ContentPlaceHolder>
</LoggedInTemplate>
<AnonymousTemplate>
<asp:LoginStatus ID="loginStatus" runat="server" />
<asp:SiteMapDataSource ID="anon" runat="server" SiteMapProvider="anon" ShowStartingNode="false" />
<asp:Menu ID="Menu2" runat="server" DataSourceID="anon">
<StaticItemTemplate>
<%# Eval("Text") %>
</StaticItemTemplate>
</asp:Menu>
</AnonymousTemplate>
</asp:LoginView>

In addition to the other answers, if you're setting the value in Page.OnLoad, remember that the Master page controls haven't been created yet.
Here's a complete layout of the order in which things happen: Complete Lifecycle of an ASP Page

What I usualy do is to make the control visible as a property of my MasterPage.
On the master page (AMasterPage.master):
public TextBox MyTextBox { get { return this.theTextBoxControl; } }
So then, on a child using this masterPage (APage.aspx) :
((AMasterPage)this.Master).MyTextBox.Text = "myText";

When accessing Master Page members from Code-Behind in a Content Place Holder file, I believe you need to do:
this.Master.whatever.Text = "new Text";
Check this link on ASP.NET Master Pages, from MSDN.

You need to do get a reference to the textbox on the master page, then set the text
TextBox tb = Master.Page.FindControl("whatever") as TextBox;
if(tb != null)
{
tb.Text = "myText";
}

Set the ClientIDMode on the textbox to "Static". When the page is rendered it assigns the TextBox's ID to something random. By changing the ClientIDMode to "Static", you should be able to reference the ID because the ID will stay the same and not change.
Or try adding an OnDataBinding event handler and casting the "sender" as a (TextBox). For example:
protected void TextBox_OnDataBinding(object sender, EventArgs e)
{
var txt = (TextBox)sender;
txt.Text = "Something";
}
This should talk to the control directly.

Need help with making label of repeater visible and link button hidden in code behind

aspx page:-
<asp:Repeater ID="rptAdd" OnItemCommand="rptAdd_ItemCommand" runat="server">
<ItemTemplate>
<td>
<asp:LinkButton ID="lnkBill" Text="Make Default" runat="server" Visible="true" CommandName="DefaultBill"></asp:LinkButton>
<asp:Label ID="labelBill" Text="Yes" Visible="false" runat="server"></asp:Label>
</td>
</ItemTemplate>
</asp:Repeater>
Code Behind:-
protected void rptAdd_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "DefaultBill")
{
Users objBill = new Users();
objBill.IsDefault = true;
e.Item.FindControl("labelBill").Visible=true;
e.Item.FindControl("lnkBill").Visible = false;
}
}
In code behind intellisense is not detecting "labelBill" and "lnkBill"..what could be wrong ?
Also need to know...that's how u access controls in a repeater ?? like using findControl() ...right ?
[EDIT]
Changed code as follows..still not working...
((Label)e.Item.FindControl("labelBill")).Visible=true;
((LinkButton)e.Item.FindControl("lnkBill")).Visible = false;
Why wont intellisense detect these two IDs??

The problem is that your controls are inside a repeater, the find control wont search recursively. Try this instead.
rptAdd.FindControl("labelBull").Visible = true;