C# - Creating A DropDownList From Database Entries And Then Binding It In Form Submission?
Jul 4, 2010
I have entries for an enumeration stored inside a database table with only the following fields: ID and Name. I want to show the values stored inside this table inside a DropDownList on a form. The user then chooses a value and submits the form.
I found a way to easily create a DropDownList from an enumeration (although it would probably be best to just populate the DropDownList with the Name fields of all the records in the table). However, I haven't found a way to later bind the DropDownList in the form submission to an integer value to put into the database (FK - PK) with the other form values.
is it possible to fetch DropDownList content via AJAX and have it be put into the DropDownList and into the SelectList in the ViewModel (with both the ID and Name parameters)? I want to selectively fetch content based on an input the user makes and I want the ViewModel to then be filled with that fetched data.
i am using html input fields for inserting data to db e.g.:
<input type="text" runat="server" ClientIDMode="Static" id="StreetNo" class="form-control input-mask-phone"/> and a submit button for submitting all data :
also i am using an update panel to trigger this button click event ( to avoid postbacks and page refreshing ) . i want to clear out all my fields after submition of data , but it won't happens , even i tried on submit_click's event also , i did :
/// after submittion StreetNo.Value = string.Empty;
I was able to find examples throughout the internet that more or less accomplished what I needed to be done, but now I have run into some problems. I need to be emailed the form data when the users submits it and then the user needs to be redirected to a thank you page, in this case "thanks.asp". I have been unable to get the form to redirect users to the thanks page, and in my efforts I think I might have messed the email process up as well.
After submitting a form, i would like to read that it is actually there, before giving my succesfully submitted message. How would i go about checking that in the easiest way?
I have my code behind from my webform and it does everything but write to the database. The form comes up I can fill it out then click the button and it takes me to the .aspx page but no entry in the database. I can't find what I am doing wrong.
using System; using System.Data; using System.Data.SqlClient; namespace orderfinal { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btnSave_OnClick(object Src, EventArgs E) { if (Page.IsValid) { // Define data objects SqlCommand comm; // Open the connection.......
i have a form which has two textboxes and a submit button.on entering data and submitting data gets stored in the database.but if i again refresh the page the same data again gets stored.How should this be prevented?
I want to bind a dropdownlist to a database. I did the following coding but it isn't working.
using System; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.Odbc; using System.Data.SqlClient;....
I am getting the error as
at _Default.rebind() in c:Documents and SettingsaMy DocumentsVisual Studio 2008WebSites oolbar1Default.aspx.cs:line 32
bind the dropdownlist to a datasource.I want my dropdownlist to display text from a database column and use the value field for some other purpose later on in code. I am getting the page displayed when i run the project but not able to get the data in dropdownlist
i have a dropdownlist,which is dynamically binding from the database ............the problem is i want a particular item in the dropdownlist to apper first in the dropdownlist
We have developed the Application using Visual Studio 2008, After publish we got the issue like After Submitting the Form the user can able to Move Backward and do the Refresh. This will again triggers the Submit Post Back and the Duplicate Record Created As Well.
This is happening for all the Web Forms. How to Avoid this ? I need a Generic Solution where i can implement that logic in Base Page then the rest of the Pages this functionality will be covered by default.
Moreover, Before Refresh We should also intimate user "Do you Want to Post the Same Data Again ?", if the user clicks Yes then it can allow the same record can be posted again.
How to do this ?? But i cannot disable the Browser Features like back, forward and Others. I have found many solutions in various web sites but it is also happening for the Validation Part Also...
I am using a dropdown list in gridview and populating it from database.However ,i am getting "object reference not set to an instance ..." error even though i have reference.I have two more similar drop down list and they are working perfectly.
I am uploading the options for the dropdownlist from a "tab delimited" text file for all the dropdown list.I am not getting where exactly the problem is.
i'm using visual studio 2005. now i've to create a insert form which shud be connected to database(mssql). can any one tell me how to do dat. as i'm new to visual studio i dnt knw it.
point me to a source where I can learn to create a form using dropdown, radio buttons, and other controls and then have web users submit information to me via email or post to SQL database so that it can be used. Do I need to be looking for sources via other languages such as php or javascript or can this be done easily using asp.net and visual studio.
I have a web forms web application (asp.net 2.0). When the user submits the form I have the submit link actually going away so they can't submit it again. However, they could press F5 and that is causing another insert into the database, which I don't want to have happen.
Is there a setting of some sort that I can set if/when they do press F5 to tell the page - don't submit again?
My web app has payment form that need to be submitted to another ASP.NET page (lets call it http://vendor.com/getpay.aspx)residing on another server.
That page will do some mumbo-jumbo works and then redirects it to the acutal payment gateway site.
when i post my payment form to getpay.aspx via simple HTML form, it works and redirects fine.
if i change the form and its hidden inputs to server side controls, it doesn't work. their page is throwing viewstate exception.
I need the form hidden inputs to be server controls so that i can bind some values generated by my code behind.(i think i can do this like the classic asp way using <%= %>, but it is like going back in standard!) I tried HttpWebRequest in the code behind, it posts the form but the browser doesn't redirect to Payment Gateway page. I am posting the payment info over non https, how can i prevent the user tampering with the posted data?.I want to validate the payment form in the backend then post it, i couldn't trust the user input data.Also the result was returned to my redirect page with query strings appended. It is also happening over the non https. how much i can trust this redirect data?
I have an asp.net page in an iframe where all links target _blank
<base target="_blank" />
But I want the form on it to submit to _self (i.e. the iframe where the page is located) when the one button is clicked. The form is an <asp:Panel> with an <asp:Button> control for submitting it.
Where can I set the target for this form? Since there isn't a <form> tag or an <input> tag in the file (ASP.NET makes them when it renders the page), I don't know how to change the target to override my <base> tag.
I am a beginner in ASP.NET. I coded for contact and enquiry forms submission (data is submitted to access db & then mailed to desired client) , its working fine on all browsers except IE! Both forms data is submitted to tblForms table of [URL] /contact/default.aspx
I have a code that must be run ONLY IF a user posts data into a form. Posting data can be made aether by pressing submit button or pressing enter on keyboard, so here is the issue. So in short I need a translation of this php code if there is such translation in asp . net of course.
I am building a simple support call system and part of the system requires that the engineer go in and update any calls he/she is working on. What I was wanted to do was make it so that when the engineer types in all his info and then hits update, the formview not only posts the data he/she has added to the database but also then sends an email to the user with the updated details.
Our team working on flash/Asp.net shopping cart projectsIn our projects we need to get previous flash file data.After two or three form submission the first page flash file data are missing.How can we maintain the state of flash file data?
i have a form which allows the user to key in the data and then submit. if everything works well on this action result, then i will redirect the user back to a thank you page.
my problem right now is that when the user click on the back button, they will be able to go back to the form page and the inputs will still be there.
and if the user just click on submit again, i will be getting some potential weird bugs.
so in terms of asp.net mvc, what's the best way to handle users who click on the back button?
I have a simple form on an ASP.NET MVC site that I'm building. This form is submitted, and then I validate that the form fields aren't null, empty, or improperly formatted.
However, when I use ModelState.AddModelError() to indicate validation errors from my controller code, I get an error when my view is re-rendered. In Visual Studio, I get that the following line is highlighted as being the location of the error:
<%=Html.TextBox("Email")%>
The error is the following:
NullReferenceException was unhandled by user code - object reference not set to an instance of an object.
My complete code for that textbox is the following:
Here's how I'm doing that validation in my controller:
try { System.Net.Mail.MailAddress address = new System.Net.Mail.MailAddress(email); } catch { ModelState.AddModelError("Email", "Should not be empty or invalid"); } return View();
Note: this applies to all of my fields, not just my Email field, as long as they are invalid.
If I were using PHP I could submit a form to a new page, or the same page, and get the posted variables by doing something such as $_POST['txtVariable'], how do I do the same thing in ASP.NET? And is it possible to have more than one form per page?
