Forms Data Controls :: Selected Indexchanged Is Not Setting Labels?

Mar 8, 2010

What is wrong with this? I provided my selected indexchanged and gridview.


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Forms Data Controls :: Getting Null Reference On Labels That Im Setting The Values To?

Mar 23, 2010

Why would i be getting NullReferenceException if im setting the labels with values?In my page_load i have the following:

Label hireMess = (Label)FormView1.FindControl("hireMess");
Label hireEnd = (Label)FormView1.FindControl("hireEnd");
HyperLink hyptry = (HyperLink)FormView1.FindControl("hyptry");

and right below that i have 1 condition to check for and then set the Text value of the 2 labels.hireMess.Text = "It Was Successfully!";hireEnd.Text ="You will be re-directed to your Pool in 10 seconds.";I compared the page to production and eveyrthing is the same and production doesnt have any issues.. not sure why its coming up null.The error comes up for the first label:Object reference not set to an instance of an object. Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:


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Web Forms :: DropDown List OnSelected IndexChanged Not Capturing Selected Value?

Mar 26, 2010

I'm having a dropdown list which is being bound dynamically from database. For that i've written selected index changed event which captures the DataValueField of dropdownlist and returns few values from the database again. This dropdown list is in a datalist control and there are 5 items in my datalist control.Selected Value is not working for first 3 items in datalist and working for remaining items.i've changed code many times and i got mad why it is not selecting the selected value..Here is my aspx code and codebehind..

<asp:DropDownList ID="drpHotels" AutoPostBack="True" runat="server" Width="200px" DataTextField="hotel_title" DataValueField="hotel_id" OnSelectedIndexChanged="drpHotels_SelectedIndexChanged">
<asp:ListItem Text="Select a Hotel" Selected="False"></asp:ListItem>


For the first item in datalist when i select a value then on Selected Index Changed event, i can see the LISTITEM "SELECT A HOTEL" instead of selected original value.NOTE: this is not happening for all the datalist items, only for first 3 items..

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Forms Data Controls :: Labels From Item To Add With The Labels Outside Of The Datalist?

Oct 25, 2010

I have a page with a datalist on it, with an image button and some labels in the datalist item(1,2)..

I have some more labels on the page which get their values from querystrings(17,18)..

I have more labels which are empty (34,35)

On image click in the datalist item, i want the labels from that item to add with the labels outside of the datalist, and the last lot of labels to show this number..

Currently it doesnt do this. Here is my code:

protected void Page_Load(object sender, EventArgs e)
Label17.Text = Request["b1"];
Label18.Text = Request["b2"];
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
DataListItem item = ((Control)sender).NamingContainer as DataListItem;
Label Label1 = item.FindControl("Label1") as Label;
Label Label2 = item.FindControl("Label2") as Label;
Label34.Text = (int.Parse(Label1.Text) + int.Parse(Label17.Text)).ToString();
Label35.Text = (int.Parse(Label2.Text) + int.Parse(Label18.Text)).ToString();

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Forms Data Controls :: Setting The Selected Index / Value In A DropDownList?

Feb 8, 2011

I have a problem in setting the selected index /value in a drop down list. The list is bound by a Linq query and I want to add an item at the top of the list and set it as the selected item.

THis is the code i am using

ListItem li = new ListItem("Select", "", true);
list.DataSource = (from ap in edc.Approvers
where ! ap.approverEmail.Equals("")
orderby ap.approverEmail
select new {ap.approverEmail}).Distinct();
list.DataTextField = "approverEmail";
list.DataValueField = "approverEmail";
list.Items.FindByText("Select").Selected = true;

The listItem li is the item i want to be first in the list and also selected. Adding this before the databind just loses the item.

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Forms Data Controls :: Setting The Selected Index In A Datalist?

Mar 31, 2010

I have a datalist that holds imagebuttons which all link to images stored in a database. When I click on any of the image buttons the datalist enlarges the chosen picture and manages to dothis as the datalist is binded by the uniqueID of the image in the database. So, when I am looking at the enlarged picture, it would be nice to be able to click 'Next' & 'Prev' link buttons to move onto the next or previous picture without having to return to the datalist in between looking at a different photo.

I have managed to set up methods for clicking on 'next' and 'prev' linkbuttons that will successfully browse back and forth between photos in the datalist but the selected index always starts at 0, i.e the first photo in the datalist. So if I'm viewing the 5th image in the list and press 'next', the first image in the list shows up. I thought just by clicking on an image button would automatically set the selected index but obviously this is not the case. I have read various threads and tutorials on the net and a lot of them point to dlIcons.SelectedIndex = e.Item.ItemIndex; I have tried to put this in the itemDataBound method for my datalist but it changes nothing. And if i try to put that line of code in other messages in the class i get error messages (I'm using Visual Web Developer C#).

its part of a final year project due in 3 weeks and by now I should be writing the report! The code I'm using is pretty huge and spread out between classes but I will include what I think might help illustrate how it all works:

<asp:DataList ID="dlIcons" runat="server" DataKeyField="AttachmentID"
OnItemDataBound="dlIcons_ItemDataBound" ItemStyle-BorderWidth="1px"
RepeatColumns="5" RepeatDirection="Horizontal" CssClass="Icons"
<AlternatingItemStyle CssClass="AlternatingRowStyle" />
<ItemStyle CssClass="RowStyle" BorderWidth="1px" />
<HeaderStyle CssClass="HeadeBrStyle" />
<FooterStyle CssClass="FooterStyle" />
<SelectedItemStyle CssClass="SelectedRowStyle" />
<asp:Label ID="lblFilename" runat="server" Font-Size="Small"
Text='<%# Eval("Filename") %>' ></asp:Label>
<br />
<asp:LinkButton runat="server" id="btnDelete" CommandArgument="<%# Bind('AttachmentID') %>"
CommandName="DELETE" Text="Delete" OnClick="btnDelete_Click"
Font-Size="small" CssClass="btnDelete" />
<br />
<asp:ImageButton runat="server" ID="imgBtnFileType" width="120" Height="120"
ImageAlign="right" ImageUrl='<%#"http://localhost:49279/PDFViewer/GetAttachment.ashx?AttachmentID=" &#43; Eval("AttachmentId")&nbsp; %>'
OnClick="imgBtnFileType_Click" BorderWidth="1PX" CssClass="imgBtnFileType"
CommandName="VIEW" CommandArgument="<%# Bind('AttachmentID') %>"/>
<br /><br />
The CS file:
protected void dlIcons_ItemDataBound(object sender, DataListItemEventArgs e)
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType == ListItemType.AlternatingItem))
DataRowView drv = e.Item.DataItem as DataRowView;
dlIcons.SelectedIndex = e.Item.ItemIndex;
int attachmentID = (int)drv["AttachmentID"];
string fileType = (string)drv["Type"];
ImageButton imgBtnFileType = e.Item.FindControl("imgBtnFileType") as ImageButton;
string fileName = (string)drv["FileName"];
Label lblFilename = e.Item.FindControl("lblFilename") as Label;
lblFilename.Text = fileName.Length > 12 ? fileName.Substring(0, 10) + ".." : fileName;
The next and prev link buttons onclick leads to these two methods:
public int nextPic()
int nextAttach = (int)dlIcons.SelectedValue;
return nextAttach;
public int prevPic()
int prevAttach = (int)dlIcons.SelectedValue;
return prevAttach;

these were void methods but i've been stuck on this for hours and have resorted to fiddling with just about everything.

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Ms Chart Funnel Setting Labels?

Mar 30, 2010

I have been playing around with the new ms chart controls 3.5 to create reports on web traffic. It looks like a pretty powerful extension, however, I am having trouble drawing a funnel chart the way I want.

I am trying to mirror one of the samples posted on ms's website but no luck. I have a datatable with two columns, first the labels, second the data like so.

page hits
default.aspx 9
products.aspx 7
contactus.aspx 2

I am able to populate the funnel correctly in that the largest part of the graph is default. However, when I put the labels on it only shows the data values, not the page name. Without the label showing property the graph is useless. I know it must work somehow because the sample chart displays product names as labels and not the datapoints.

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Setting Time Labels On RangeBar Chart?

Feb 22, 2011

I have a RangeBar chart that will show different schedules and how they overlap. I can't seem to get AxisY (which is really AxisX, but they switch when you use a RangeBar for some reason) to display the hour. It displays a gridline for every hour, but the label is the date, which is not helpful at all.

I tried

asChart.ChartAreas["ChartArea1"].AxisY.CustomLabels.Add(0, DateTimeIntervalType.Hours, string.Format("{0:H}"));

but I get the error: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

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Forms Data Controls :: Change Values Associated With Labels

Jan 24, 2011

I have a gridview and there is a templateField with a few labels in it. I have a dropdownlist in a headertemplate and when the selectedindexchanged event I am trying to change the values associated with those labels. The name of the gridview is Gridview1. Here is the template field when it is first shown

<asp:TemplateField ItemStyle-CssClass="phoneCostsPhoneStyle" >
<div style="position:relative">
<asp:Label ID="lblDayCallPhone" runat="server" Text="Day:" CssClass="lblDayCallPhoneStyle"></asp:Label>
<asp:Label ID="lblDayCostsPhone" runat="server" Text='<%# Eval("NATIONAL_DAY", "{0:C}") %>' CssClass="lblDayCostsPhoneStyle"></asp:Label><br /><br />
<asp:Label ID="lblEveningCallPhone" runat="server" Text="Evening:" CssClass="lblEveningCallPhoneStyle"></asp:Label>
<asp:Label ID="lblEveningCostPhone" runat="server" Text='<%# Eval("NATIONAL_EVENING", "{0:C}") %>' CssClass="lblEveningCostPhoneStyle"></asp:Label><br /><br />
<asp:Label ID="lblWeekendCallPhone" runat="server" Text="Weekend:" CssClass="lblWeekendCallPhoneStyle"></asp:Label>
<asp:Label ID="lblWeekendCostPhone" runat="server" Text='<%# Eval("NATIONAL_WEEKEND", "{0:C}") %>' CssClass="lblWeekendCostPhoneStyle">.........

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Forms Data Controls :: Labels Wont Display?

Oct 25, 2010

I have a page with a datalist on it, with an image button and some labels in the datalist item(1,2)..

I have some more labels on the page which get their values from querystrings(17,18)..I have more labels which are empty (34,35)

On image click in the datalist item, i want the labels from that item to add with the labels outside of the datalist, and the last lot of labels to show this number..

Currently it doesnt do this. Here is my code:

protected void Page_Load(object sender, EventArgs e)
Label17.Text = Request["b1"];
Label18.Text = Request["b2"]; [code]....

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Forms Data Controls :: Way To Set The Values Of Labels Within Modalpopup

Feb 12, 2010

What am i missing or doing wrong to accomplish this. I want to set the values of my labels within my modalpopup with the values of the item clicked on within my gridview. Here is my RowDataBound code, im sure i have to do this somewhere else, but you will see the 2 labels im trying to set. When they click on ibHT image button a modalpopup opens and works great, but the labels are always set to the first record in the gridview.


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Forms Data Controls :: Comparing Two Labels In Gridview?

Feb 1, 2011

i have two labels inside the gridview and i want to compare it if they are equal or not!

lblAns and lblStudAns

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Forms Data Controls :: Labels Show 1 Or 0 Decimal Places?

Oct 27, 2010

i have some labels on a page. some id like to show 1 decimal place, and others to show the nearest whole do i control the decimal places my labels show?

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Forms Data Controls :: Chart Doesn't Show All Labels

Oct 6, 2010

I'm trying to create a very simple Column chart. There are 10 items in X axis, but chart shows only 3 of their labels. For clarification, I'm trying to show Product sales count in chart. There are 10 products. In X axis, chart shows 10 products but, only 3 of them has a label for product name. It should be a setting for this, bu I couldn't find it.

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Forms Data Controls :: Aligning A Table That Contains Labels With A Gridview?

Feb 1, 2011

I have a table on top of my gridview. My table contains labels. However, though I would like to align the size aka the length of the table with the length of my gridview so that everything looks decents. How do you go about doing so.

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Forms Data Controls :: Exporting Both Labels And A Gridview To Excel?

Jan 20, 2011

I have the following scenario shown below

Label: Name
ID Qty
1 10
2 5

Kindly note, the ID. QTy are currently in a gridview and the Label is a label on top of the gridview. I would like to export both the label and the gridview to can I do this.

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Forms Data Controls :: GridView Returning Null Labels?

Feb 8, 2010

This problem is driving me nuts. I have labels inside a gridview. When i reference them, i keep getting a null error. This is definatly that it cant find the labels inside the template. below is my code that i am using.


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Forms Data Controls :: How To Use Controls Like Image Button And Labels In Datalist Control

Apr 24, 2010

i need to know how to use controls like image button and labels in datalist control,and how to use imagebutton click event which is in datalist control.

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Web Forms :: Setting Dropdownlist Selected Value

Jan 15, 2010

My problem is I need to set selected value of a drop down list to a value I retreive from a database. The example only has a know value.

Below is the HTML and Code.
Runat="server" />
<asp:sqldatasource id="srcCatogory1st1"
SelectCommand="SELECT CategoryID, CategoryName FROM Categories WHERE ParentCategoryID is null ORDER BY CategoryID"
Runat="server" ></asp:sqldatasource>
Sub Page_Load()
End Sub
ddlCatogory1st1.Items.FindByValue("A").Selected = True
End Sub

When I run this page I get

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 222:
Line 224: ddlCatogory1st1.DataBind()
Line 225: ddlCatogory1st1.Items.FindByValue("A10").Selected = True
Line 226: End Sub

Even if I take out the databind I get the same error.

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Forms Data Controls :: Develop A Custom Data-bound Control Which Will Contain, Few Text-boxes, Drop-down Lists And Labels?

Mar 24, 2010

I need to develop a custom data-bound control which will contain, few text-boxes, drop-down lists, labels, and other standard web-server controls. And, I want to be able to load this control from a web page on button click. When the user enters any data to any of its child controls, i should be able to save, and also retrieve when the data-bound control is loaded again. Also, the data in the child control should retain their value on postback. What approach should i follow?

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Forms Data Controls :: Labels On The X-axis To Display Vertically Rather Than Horizontally?

Sep 9, 2010

I have a fairly basic line graph which is bound to a SQLDataSource control. The graph displays perfectly, but I want the labels on the X-axis to display vertically rather than horizontally.

I have used the following code to try and do this but it is having no effect:

<AxisX Title="Patient Safety Submissions" IsLabelAutoFit="True">
<LabelStyle Angle="90" interval="1" />


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Forms Data Controls :: Able To Align Y-labels At Chart If Using MSchart Control?

Jan 12, 2011

I am wondering if I am able to align y-labels at chart if I am using MSchart control. I searched at google, but I got feeling it is not possible to align them, just title of y-axis.

Here snip of the chart if my question is not clear enough: [URL]

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Web Forms :: Setting 'default Selected' Value For Dropdown?

Jul 29, 2010

I am not trying to achieve anythign fancy but just trying to set default selected value for one of the dropdown that I am using. for that I am doing Items>selected= true for whatever item I want selected when i load the page. In my case, it is a month dropdows and I am selecting date 14 as selected default value out of all 30 values but somehow, out of the blue .NEt decides to show me 29 instead of 14. I am not sure if there is some another setting that is overwritting this value.

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Forms Data Controls :: Make Gridviews And Labels Into Non - Editable Single Report

Jan 24, 2011

I have 3 gridview,4 lables having the information, i have a button(Report), when i click this i want make this as Non-editable format single report. i have seen converting Webform to PDF but we should fall back to 3rd party tool to produce the report.

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Web Forms :: Setting Menu Selected Item From Code Behind?

Nov 10, 2010

I have a master page (Site.master) with a navigation menu linked to a datasource (Master.sitemap). I have a nested master page that has another navigation menu. For any item clicked in this nested navigation menu, I want a particular menu item in the Site.master navigation menu to be selected.

Here's my Site.master menu:

In my Site.master.cs I have this:

In the nested master page, Products.master I have this:

In the Products.master.cs file I try to change the selected item.

The master navigation and products navigation menus work just fine by themselves. But when I've tried to set the selected item of the master menu in the Page_Load above, I can't seem to access it. What I've found in trying to do this is the NavigationMenu seems to be uninitialized. The menu Items list is empty. What am I missing here? Why are there no menuItems in the Master.NavigationMenu control?

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