Php - ASP.Net - Looping/conditional Statements In Layouts?
Sep 21, 2011
Coming from PHP and more specifically many of the MVC frameworks out their, I've been use to using basic foreach and if constructs in PHP directly in the layout. Now that I'm learning ASP.NET I'm presented with more proprietary concepts like a ListView to control looping, etc...
So to give an example of what I want to do..
<div id="container">
<h1 class="header">Title</h1>
<% For Each item In ItemsCollection %>
[Code].....
Then there isn't a lot I have to handle in the Code Behind file... besides making ItemsCollection available.
Is This considered Bad Practice? Should I spend the time learning the proprietary controls for ASP.NET? Are there specific limitations of this approach?
Is there a way to define a conditional define, i.e. #const, in a asp/vb.net app that it accessible across multiple source files? I want to use, for example, #const useOracle=TRUE but to be able to change it's value in only one place.
I have several text boxes I need to validate. I am not understanding how to validate in Visual Basic 2008. So I deployed standard If Statements to handle bad data. I am having two problems.
Lets say the user entered wrong data, example, numbers; an error message is displayed. The text boxes cannot contain numbers, be left empty or contained characters, like !@#$. The problem is if the user enter text, and then entered a wrong data again the code does not work or display error message. How can I make the conditions so that they throw out error message even if the user had previously entered good data.
Another example: If the user enter good data in text box 1 and bad data in text box 2, the error message does not work.
Finally, how do I filter out characters to allow only text. Is there a way to use this code on multiple text boxes with out writing the entire code for each form control?
Here are the conditional statements. Private Sub btnDataSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDataSubmit.Click If IsNumeric(txtDataEntry.Text) Then lblErrorDisplay.Text = "Invalid Name!" lblErrorDisplay.BackColor = Color.Red [Code] .....
I am trying to loop an array in a sql insert statement but i can't get it working. Below is a demo i'm trying to get it running. I think i am having problem with the declaration of variable in sql statement.
Public Class Form1 Dim arrayValue(5) As Integer Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click[code]......
I have a problem that is stopping me from creating my interface properly in Visual Studio. I have a listbox and beside that I have a button. I want the button to be on the right side of the control, level with the top of the listbox, but it is remaining at the bottom of the listbox.
Can someone give me a site to a tutorial that will help me write a program that will generate a pattern using do while, if else statements,and do until statements. I have been using google but I can't find anything. I need to generate patterns a certain size 6 by 6 or similar such as something like a checkerboard but where the ^ symbols is there a suppose to be a blank space..
I am working on a project that requires the use of multiple tabs, but the problem is all my codes/layouts so far has been on a single form. How easy would it be to transfer the existing codes and layouts on a single form to a multi-tabs environment ?
I've wanted to know the answer to this question for a long time but I never really took the time to ask anyone. My question is, why do rounded edges or drop shadows of transparent form layouts turn white. Take a look at the following image to know what I'm talking about.
I need to know how to have a button on a tab to create another button on a second tab that contains a panel, with appropriate spacing, the same size as other buttons already present, and the name of the tab that generated this new button as the text on the newly created button. I.e. button1 on tab1 will create and place a new button on a panel in tab2 that already has a grid of buttons (maybe 3x10 buttons) which will be placed underneath a particular column with the text tab2 on the new button which can also refer back to that tab automatically. Hopefully we can get all this code under a single button event.
I also don't know how to have a button on tab1 that focuses on tab2, which sets the back button on tab2 with a reference to go back to tab1 in order to remain dynamic. I.e. clicking on tab1's button will go to tab2 and set the back button there with a link back to the tab it was referred from.
I'd also like to know if there's an easy way to create and destroy tabs with a specific layout. I.e. We have home tab, and comment tab. (This is for the sake of argument) On the comment tab1 (which contains all posted comments), we have a new comment button which creates a comment tab2 (or a dialog box for that matter) with appropriate textboxes, labels, and buttons in the right places which could also make use of the issues I posted above. So the new comment button on the comment tab1 will create either a new comment tab2 with appropriate objects, or a dialog box with the same, and then the submit button on this comment tab2 or box will create a new textfield/buttons on the panel containing the grid of buttons with the information provided in the fields from comment tab2/dialog box which is then destroyed.
I hope i haven't made the examples too confusing, but I can't figure out how to even make progress in these directions. Trying either fails completely, or semi-fails in getting these examples to function 100%.
I've already tried posting in other forums, but with no replies. Hopefully you all can help me figure this out.EDIT: This is not homework, I have scoured forums and google trying to find the answer to these problems. I'm hoping that because these are mainly VB based forums I can find some answers here.
The template I use for all of my pages looks at the style.css to get the header image. I want to change it so that it looks at who logs in and displays an image based on who they are.
Is there a way to set a variable in VB.NET in an IF statement. I would like to do the following:
[Code]...
Is there some way I can get the last "ElseIf" to work? I know I can re-write it to get it to work but is there some syntax that will make it work the way it is?
In this query against a datatable i'm trying to do some conditional filtering.The check against Timeband(index N) should only be done when the Index exists. (the base code only had three item fields, i've converted them to a simple list)
Dim res As DataTable = ( From dr As DataRow In dtTimedRow.AsEnumerable() Select dr
[code]....
The above code triggers an Exception if the count = 1. It executes the code next to imeBands.Count > 1 which it should not. What would be the correct solution for this code.In the mean time i've added a simple filter function.
I am very new to VB and was thrown into the water with a very big project done in VB.What I am trying to do is this:1. The initial search is for locations within an area of 200 miles.2. If no locations are returned search for locations within 500 miles.Seems easy enough but I cannot seem to figure out how to do part two.If thunder.apps.ddr.franchiseconnect.bll.Current.Settings.Location.hasValue Then'we run this procedure to get the location's value from ZIP db for lat, long assignment
I have a datagrid in asp.net and vb.net, and i'd like to show the status of the item of a certain row with two possible icons.I have a function that checks validation and returns a boolean value that uses some fields of the datagrid.
I have some textboxes on a report in VB 2005. There are three "Status Types": A, B and C. I want an expression like this to work on a number of textboxes:
I have two combo boxes: cboRepairCategory (plumbing, landscaping, etc) and cboVendors. I am using Stored Procedures in SQL to store the data from my database and then load them into the combo boxes.The cboRepairCategory will be loaded first. Once the user has selected what type of repair it is I want it to restrict the amount of vendors that can be selected, so instead of saying:CREATE PROCEDURE dbo.up_Fill_Vendor_Combo
AS SELECT VendorID, CompanyName FROM Vendors
[code].....
I would select only the vendors that have the RepairType of say Landscaping, so thecboVendor would load now only Vendors with Landscaping instead of all vendors.My question is this: Is this done in SQL in my Stored Procedure or is it done in VB in my functions for my combo boxes. I've never tried this before I am totally lost on it. I have fiddled with the code on both ends but to no avail.
I have a DGV that is bound to an Access DB DataTable. I have added a column in the DB that is either a 0 or a 1. When the program loads, I want to change the backcolor and forecolor of each row based on the value of this column's cell. ie: a 1 makes the row red, a 0 makes the row green. this column would be hidden in the DGV.
Is this possible to do at runtime even though it is bound?
I'm not sure when I would actually do the color swap, formLoad?
Second question, as I iterate through each row of the DataGridView and need to change the value of this column, will this update my DB automatically, or do I need to call an update() after each row?
In Perl (and other languages) a conditional ternary operator can be expressed like this:my $foo = $bar = $buz ? $cat : $dog;Is there a similar operator in VB.NET?
I want to be able to call forth hundreds of different photos be selecting them from a listbox or something of that nature.
Normally, if I only had a few images, I would amke their visibility false and then use If statements to turn on their visibility once it is selected. However, putting hundreds of images on to a form and then changing their visibility, seems like a pain.
I was wondering if there is a way to call forth each photo within the resources folder when an item is clicked so I don't have to put each one directly on the form.
Quick question, of which the quickest and easiest answer may well be to rearrange related code, but let's see...So I have an If statement (a piece of code which is a part of a full working solution written in C#) rewritten using VB.NET. I am aware the VB.NET IIf(a, b, c) method evaluates both b and a regardless of the trueness of the first evaluation, but this seems to be the case in my standard construct, too:
If (example Is Nothing Or example.Item IsNot compare.Item) Then 'Proceed End If
In the members region I declare _Name and assign it the value "NameA" but how do I assign this value conditionally?The idea is that if in some file there's a value set than that should be the default value and not the hard coded one, if non is set the hard coded one should stick.
#Region "Members" Private _Name As String = "NameA" #End Region #Region "Properties"
Is there a way to conditionally format an Excel Chart? For example I have a bar graph. Currently I have the bars a purple color. I would like to turn a certain bar red if it meets certain criteria. Is there anyway to do this?
