Processing Variable Number Of Form Fields?
May 17, 2010
I am working on a form which displays information about orders. Each order has a unique id, but they are not necessarily sequential on the form. Also, the number of fields can vary (one field per row on the form). The input into the form will not be mapped straight into the database, but will be added to the current value in the database, and then saved. An example of the form is in the picture below - the callout on the right shows the id for each row.
I know how to generate the form like this, but I can't work out how I can easily process each of these rows reliably. I also know how to give each of the fields a unique identifier, like name="order-23" or name="order[23]", but how can I translate that name so that I can update the related record in the database?
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Dec 1, 2010
I wanted to gather some methods on how to add a variable number of fields to my form (with Add New and Remove buttons). I know that ASP.NET MVC has easy methods, but I'm unable to find any easy methods for WebForms.
Here's what I've used so far:
Adding a new UserControl to a PlaceHolder on PostBack (I've had to fiddle with ViewState to make this work correctly, huge pain) Adding a new row to a grid and having a template field in a grid (works decently but kind of awkward) Actually having several fields on the form by default and hiding/showing them dynamically (fairly easy but you have a set number of fields.)
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Feb 25, 2011
I have a relatively complex dataset (numerous tables, some with multiple records) generated from reading in an XML file. I need to connect said dataset fields to an ASP form. At the moment I'm assigning them manually, like so in the pageload:
txt_first_init.Text = formData.ds.Tables["phrmHdrKey"].Rows[0]["first_init"].ToString();
txt_last_name.Text = formData.ds.Tables["phrmHdrKey"].Rows[0]["last_name"].ToString();
ddl_pregnancy_flag.SelectedValue = formData.ds.Tables["pPhrm"].Rows[0]["pregnancy_flag"].ToString();
And conversely when it's time to submit.
formData.ds.Tables["phrmHdrKey"].Rows[0]["first_init"] = txt_first_init.Text;
formData.ds.Tables["phrmHdrKey"].Rows[0]["last_name"] = txt_last_name.Text;
formData.ds.Tables["pPhrm"].Rows[0]["pregnancy_flag"] = ddl_pregnancy_flag.SelectedValue.ToString();
I did some looking into binding the textboxes (and dropdownlists, and checkboxes, and and and...) directly, but it seemed to be too many formats to use.
So this works fine, but as the number of fields increases, those load and unload lists are going to get unwieldy.
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Dec 2, 2010
What would be the proper syntax in ASP.NEt 3.5 C# to assign a TextBox value to a temporary or session variable to be manipulated (added, subtracted, multiplied, divided) at different points in the application? I want to add a decimal number to this variable in almost every instance as well.
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May 21, 2010
I'm trying to extend the functionality of an ASP.net application that I'm working with. For its logon page, it uses an html form to post to a dll to handle it's login logic. I'm wondering if there is any way to redirect that html POST to my C# code so that I can do some processing and then (and this is the part that I haven't figured out yet) POST it to the dll so that the regular logon logic can continue. I can make changes to the logon page, but the final step must be to do an HTML POST to the dll. I can't change that.
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May 18, 2010
I want to pass the string input from a text boxe in Form1 to appear in a specfic textbox field in form2.
I'm trying to do it via HyperLink in the source form:
NavigateUrl="~/PassVarTest.aspx?txtFirstName"
and this code in the destination form:
[Code]....
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Feb 22, 2010
I would love to use hidden field value but I think I am missing something to do.
Since every page refresh or staying a little bir longer on the page, the value is missing.
[URL]
How can i do the this cookiles suff above...?
I use hidden value to keep the url to redirect to next page. May be i sould not keen on using hidden value, session variables are better?
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Sep 3, 2010
[Code]....
Does anyone have any ideas on this? I have 20 parameters.
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Mar 29, 2010
Scenario: I have a form with 3 input fields (text1, text2, text3). Is there a method to capture these fields in the aspx file of a second webform? I think you have to use someting like <%= %> but I'm not sure.Idon't want to use the code behind file because the number of input fields is dynamic
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Mar 18, 2011
I need to run a variable amount of insert statements. Is it best to run through a loop and execute the query one at a time? Or, is there a way to send all the inserts in one go?
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Apr 7, 2010
I have a project with a database. There is a table in the database which store news. The news are composed by a headline and a link to a web page where you can read the news.
I want to make a unordered list, where, for each element in a database table, there will be a line in the list, with the news headline displayed by a Label control followed by a Hyperlink control that takes you to the news webpage.
How can I construct a page with a variable number of controls?
I was doing something like this:
<% foreach(News news in NewsTable) { %>
<asp:Label ...></Label>
<asp:HyperLink ...></HyperLink>
<% } %>
But the result of this is that I have the same Label and HyperLink drawed several times.
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Apr 12, 2010
in my project i kept two forms if i click the first form submit button it will transfer to second page if i click the second page submit button it will transfer to first page . SO WHAT I NEED IS
1. I WANT TO KNOW HOW MANY RECORDS THEY ARE ENTERING i.e IF THEY CLICK THE SECOND PAGE SUBMIT BUTTON THEY COMPLETED ONE FORM I WANT TO MAINTAIN A COUNTING .
I'M NOT GETTING ANY IDEA IF U EXPERTS HAD SOME IDEAS TELL ME WITH CODING.
if we keeping session means how?
PLATFORM:ASP.NET 3.5 CS:VB.NET DB:SQL2005
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Mar 7, 2011
I should perform a Query like this Select * from produtcts where model like @MODEL Now if model is selected from combobox, it should be Select * from produtcts where model like '%MODEL1%' while, if selected chooise is null, it should be like each element in my combobox. how should i do this (in SqlDataSource)
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Nov 22, 2010
How do I restrict the number of input fields in the form to match the size of the columns? Table Columns Reads:
state: Type Char; Length: 2
zip: Type: char; Length: 5
Phone: Type: char; Length: 12
Fax: Type: char; Length: 12
Email: Type: nvarchar; Length: 256
BoundField Reads:
[Code]....
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Feb 2, 2011
I have an asp.net form in which i want to clear all the data what I entered in textbox,dropdownlist etc. So how can I do without going to each textbox and set the value.
like TextBox1.Text=""; etc. How can i clear all values in a form ?
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Jan 13, 2011
I am trying to populate a web from from a SQL table.
This is what I have right now, though I am not sure if it's the best way to do things,.
Public Class userDetails
Public address1 As String
Public address2 As String
Public city As String
[Code]....
however, there are like 50 fields in the User db, and it seems like a lot of retyping..
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Apr 5, 2010
I have a section of a form that I need to handle differently from the rest of form results. In the section that needs special handling I need to iterate over 3 form fields that have the same name. They have to have the same name, I can't change it. The section of the form I am referring to looks something like this:
<td><input name="Color" size="20" value="" type="text"></td>
<td><input name="Color" size="20" value="" type="text"></td>
<td><input name="Color" size="20" value="" type="text"></td>
Using C# I try something like this:
I try to handle it like this:
int i;
for (i = 1; i <= Request.Form["Color"][i]; i++)
{
colorName.Text += Request.Form["Color"];
}
Which leads to the following exception:
System.NullReferenceException: Object reference not set to an instance of an object.
How should I be handling form fields with the same name?
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Aug 3, 2010
I am currently designing a MVC Application and I am up the point where I want to add Hover Over information to the fields I have on my forms. The code for these forms take this standard approach:
[Code]....
I need to know How I would say in the case above add a Hover Over Event to the "TblName" field which would then provide some descriptive information to the user in order to provide them with more information?
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Jan 25, 2010
I'm trying to learn how to line up fields of a form using CSS instead of tables. I'm having a hard time with a CheckBox control. Here's the code:
<html xmlns="http://www.w3.org/1999/xhtml" >
<label for="CheckBox1">CheckBox</label>
<asp:CheckBox ID="CheckBox1" runat="server" />
[code]...
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Feb 2, 2011
I'm a newbie here. I have created a custom control that requests a set of data from a user. However, I want to be able to have a variable number (dictated by the user) of these data sets entered on each page. How can I create and refer to a variable number of instances of a user control on a single page? It's hard to explain in words, but I'm basically looking for some way to do what amounts to the following:
[code].....
Is there a straightforward way of doing this? I haven't been able to find a clear answer via Google, which brought me to this group.
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Aug 21, 2010
I need to provide some alternate content for my non-Flash users. I have a directory of video files that is scanned using the DirectoryInfo() function, and I want to use the results to embed all files ending in ".mov" in QuickTime players on a web form. How would you approach this? Right now I am using the count on the array of videos to determine how many times to repeat the embed code. But this seems inelegant.
Is there a way to have a single QuickTime player.ascx control that gets duplicated according to the number of videos available for display?
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Oct 28, 2010
I need to populate my textfields from values in database. I also need navigation buttons to scroll through all records, similar to an access form. Below is what I have on the OnLoad event:
[code]....
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Jan 13, 2011
The default built-in user registration form that we have in the Asp.Net Membership is that there are only fields for:
UserNamePasswordConfirm PasswordEmailSecret QuestionSecret Answer
And we have seen all these in a user registration form. But what if I want to add more fields to it. For example, take a look at this website, this registration page has a lot more fields for users to enter information: [URL] This regirtaion page has the information for Street Address, Suburb, Gender, DOB and lot more. How do I add these fields into my registration page. I have heard of something called profile. But how do I intergrate profile into this, if this is what we use to add more fields to user registraiton page. share a sample working code of user registrtion page with more fields.
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Nov 14, 2010
New to .net and revamping a project from classic. In short, I am trying to create all the form fields in the view based on the database and want to figure out the best practice for .net. I've tried a few things but none seem very clean.
So basically select all the fields and data from the database and loop through each record creating the field type(text, drop down ect)/name/onchange event ect along with creating the basic layout, like putting in a column or group a set related fields.
I see how it can be done in the view itself, but there is a bunch of logic required that would be better suited for a function or class more than a bunch of if then elses in the view itself.
Just for context, it's for a real estate investment management project. So there are over 1000 fields that represent information on a house. What the end user see's is based on their choices and their security. Also, all the fields save with the onchange event which is tied to the name of the field. So everything is dynamic.
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Apr 10, 2010
HTML has an input button type to reset all fields in a form to their initial state in one step: <input type="reset" ... />.
Is there a similar simple way to reset all form fields of an aspx page from code-behind? Or is it necessary to reset all controls one by one with TextBox1.Text=string.Empty, TextBox2.Text=string.Empty, etc. ?
Update:
Context is a simple Contact/"Send us a message" page with 8 asp:TextBoxes on the page (where the user enters the name, address, phone, email, message, etc.). Then he clicks on submit, the Onclick message handler in code-behind sends an email to some administrator, and all the form fields the user filled in should be emptied and he gets a notification in a label ("Message sent blabla..."). I want to have the form fields cleared to avoid that the user clicks again on submit and the same message is sent a second time.
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