I have a need to create controls such as textbox, dropdown, etc in code (c#). The number and data for them is all contained in a database.
What is the best way for me to create and add these to the page (need to be underneath the next one as in a table layout) and then how do I refer back to these in code on postback?
I just can't wrap my head over this and don't have enough time to read long articles.
I already have an HTM Table on my form. I dynamically create New Roows and Cells and keep adding them to the Table .
The cells Contain Labels, Textboxes, Drop downs and Buttons. I also add Handlers to the dropdowns
The form loads perfectly the first time. But when I change the value in a drop down, on the postback, I get a msg saying that " There are multiple controls with the same name 'txtCheckin' . How do I handle this?
I am creating a gridview that inherits from a webpart. Code runs with out the error but just shows a blank page. I am looking for an example of the page directive, register and user control tags. I am not sure what other steps I need to take to show the gridview on the aspx page. Here is the code:
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I need to create web controls (e.g. label etc) dynamically.The problem is that for example,
on my onload event, I create a label. The text of the label is read from one line of a xml file.
But sometimes the text should be like " Messages (4)", in which the message count is something not generic and need some logic to calculate. I tried to put things like "Message (<#% MessageCount %>) " in my xml file, but the displayed text label is:
Message (<#% MessageCount %>) instead of Message (4 ).
I am creating n number of Combo boxes dynamically at run time and adding a Handler of Combo1_SelectedIndexChanged() to the combo boxes.
At run time, When I select an item from one of the Combo boxes, the event fires n times rather than 1.
So for example : If there are 5 combos created, and I select an item from my first combo, the event Combo1_SelectedIndexChanged() , fires 5 times and that is an issue for me. How can I restrict this to run only for the combo that I selected.
In my code behind I can use try/catch blocks to deal with database errors. How can I capture and handle database errors when using a datasource with a dataenabled control? For themost part I'm using ListView and EntityDataSource controls.
View 7 RepliesI dynamically build up a table of dates/hours worked by a user.
Last row, for each date (column) contains a little user control where the user can enter some text.
The user control work with some jQuery/UI and I will end up with each control have a date and reason set in hidden controls.
How do I get hold of these controls only when the user click a button in the code-behind? (silly question I know, but I'm not used to how webforms does its' thing)
I want to create buttons and text boxs runtime and assigne to asp table.
When user clicks on button text box should be visible and user will be able to type some text and submit to server. This is nothing but something
like Blog. I am able to create asp table, button and testboxes but could not do visibility and events of buttons.
I'm building an application that uses GridView controls to display data to a page.In my editemplate i have following control
<div class = "divBox">
<div>Beginn/Zeit 2</div>
<div>
<asp:TextBox ID="tbBeginn2" CssClass="fSelect"
runat="server" Text='<%# Bind("beginnDatum2") %>'/>
BeginnDatum2 has datetime-Format in SQL-Server.
For the update i use an objectDatasource with following updateparameter
<asp:Parameter Name="beginnDatum2" Type="datetime" />
Now i'm trying to update this field but i have a problem when BeginnDatum2 must be null.
I get following (german) Errormessage:
SqlDateTime-Überlauf; muss zwischen 1/1/1753 12:00:00 AM und 12/31/9999 11:59:59 PM liegen.
And this is my paramter
Public Function UpdateSeminar(ByVal kursid As Integer, ByVal id As Integer, _
ByVal beginnDatum2 As DateTime, _
ByVal endeDatum2 As DateTime, _
cmd.Parameters.Add(New SqlParameter("@beginnDatum2", SqlDbType.DateTime))
If beginnDatum2 = Nothing Then
cmd.Parameters("@beginnDatum2").Value = DBNull.Value
Else
cmd.Parameters("@beginnDatum2").Value = DateTime.Parse(beginnDatum2)
End If
i have a gridview which is binded to a dataset in the code-behind file
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I am using asp.net/c# application. In my application, I have a gridview.<asp:GridView id ="gv_QuestionList" runat="server"> </asp:GridView>In Code Behind, I created dynamic textboxes and DropDownLists on RowDataBound.
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I have a Save button out side the gridview which stores all the row values into database. when I click the "Save" button, I lost dyanamically ceated controls like textbox,dropdown and values (on postback).How can i get all the dynamically created controls and values after the post back?
i created a gridview with two columns and 8 rows dynamically. All the rows are empty and editable at runtime. I am giving column names for this grid from some other .aspx page by passing column names using querystring.Because i am using this grid for three different pairs of column names. i would like to know how to apply Required Field Validator, Regular Expression Validator and Range Validator on Gridview textboxes. So that by using those validators i want to validate user inputs. And i would also like to know how to add rows at runtime for this grid.
I am using ASP.net 2.0 and C#.net for this.(Visual Studio 2005)
The code i am using to create gridview is below.
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Ive been playing around with the default ASP.NET web application template and the following code throws an exception:
Object reference not set to an instance of an object.when clicking the created button.
Note 1: The markup is just a blank page with a placeholder in it - see below.
Note 2: Substituting Button for LinkButton, and the code does not throw an exception and works.
public partial class test : System.Web.UI.Page
{
protected override void OnInit(EventArgs e) [code]....
i'm using datalist to display product details.
every item in datalist contains...
product image, quantity, details button, and add to cart button
my requirement is whenever someone selects the quantity textbox or edits it the default button for the page should be add to cart button.
or add to cart button should be clicked itself whenver enter button is pressed from keyboard.
I'm using Visual Web Developer 2010 Express with C# 2008 and .NET v4.0 to create a website which will have a database application. The database is SQL Server 2008.
I would have searched this forum for similar questions but I can't find a 'Search this forum' option! So I apologise if someone has already answered this.
I've successfully displayed rows from my database by dragging and dropping a GridView and an SQLDataSource control onto my page, and by using the Connection Wizard to set them up. But when I go live with my new pages, I will have to put my database in a different folder, and until I edit the web.config connection string to point at it I expect to get an exception.
I understand that when you try and open a database connection, this is the perfect place to use try...catch exception handling. But all the examples I can find put the try-catch code on the Button_Click event! Where should I put it? I can' t find anywhere where my controls actually attempt to open the database!
I know I could rip out what I've done and write all the code to connect to the database myself, but as I've finally got everything to work I would prefer to make the change as small as possible. So, what is the minimum change I have to make to add exception handling to my datasource/ gridview?
Before I begin, I would like to acknowledge that I might be using incorrect terms below due to my lack of experience.
I have a GridView bound to an ArrayList of Custom Objects. I have a button as part of each row, which when clicked, I delete the row from the Arraylist, and re DataBind() the GridView. While this deletes the Row, it causes the Page to be refreshed that takes the User back to the top of the Page.
E.g. If the User clicks on the button of a row at the bottom of the Page, after the deletion, the Page gets refreshed and the User is now taken to the top of the Page.
This is irritating especially in long lists i.e. GridView with many rows. (I don't want to use paging here.) Is there any way to avoid this, or mitigate this problem.
In the edit template of the listview I have a multiline textbox. But when the row is edited and the template switches to the ItemTemplate, the text is not displaying properly in the associated Label control (missing linebreaks).
I know that the Label control doesn't understand the enter key code, and I need to do a replace on the string. What I have right now is :
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I have a Datagrid inside a Datagrid and I am trying to perform an action (open an pop-up window with related values in the querystring) when the inner datagrid control is clicked.In this simplified example I have 2 datagrids (datagrid1 and
datagrid2). In the second datagrid (datagrid2) I have a LinkButton (lbViewDetails) that I want to control what it does based on the value in the upper datagrid (datagrid1)'s lblRecordId value.
I have a gridview and I do Add, Modify and Delete operations. I am comfortable adding and modifying any text or date value. Now, I have a dropdown list to be displayed. I need to add and modify. The contents in the dropdownlist is fixed. Below is the code. I know there is a problem in my
<EditItemTemplate>
<asp:TemplateField
HeaderText="Leave Type">
<EditItemTemplate>
<asp:DropDownList
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What is that I need to have code for EditItemTemplate
I'm fairly new working with Javascript. I'm working on an issue where I have a GridView with multiple Checkboxes and Radiobuttons. A user can check multiple checkboxes and if a radiobutton is selected, a checkbox has to be selected. This scenario is working fine, presently with existing asp.net code. But, I want to automate it using Javascript, so that I could avoid a postback.
View 4 RepliesI have a user control called ucTriStateButton. It raises an event when it is clicked, called TriStateButtonClicked. If I put this user control on a page, it works fine. Here is the declaration on the .aspx page:
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When the button is clicked the method tsbTest_TriStateButtonClicked executes correctly.
The problem is when I put the user control in template field of a GridView.
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There is no way to hook the event handler to the control in Page_Load because I cannot get a reference to tsbMorning. So I did it in the RowDataBound event handler of the GridView, where I also do a bunch of other row-specific stuff. Although this builds and runs, the event is never actually subscribed to and so never gets fired.
So the question is - how can I handle an event from many instances of the same user control within a GridView? I am calling the same bit of code regardless of which user control is actually clicked. I only need to know that one was clicked.
im trying to handle the event for my grids itemtemplate button but its not firing.
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i want to find a row of my button click and there i can call my method.
i created a chart in Excel, but now I am having the time of my life to create the same chart in a control.
If you can see on the bottom I have converted the labels to percentages.
In excel I am using a series of data cells to create the bottom labels (0-8 with a .5 increment).
The Y-axis is done with a fixed maximum value of 2 and the labels are percentages as well. How do I get those same axes on the chart control?
not quite sure where I'm going wrong here. I'm trying to manually handle sorting in a Gridview that is populated with the following data source:
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At the moment, nothing is happening when I click on the column headings. I ran it in debugging mode in Visual Studio and put a breakpoint on the Sorting event handler. I noticed that the variable dtSortTable is empty even after the TryCast(VacanciesGV.DataSource, DataTable). If I hover over this statement in debugging, it shows the data from the file system, so it does appear to be reading it.
If an error happens in the DA_layer, how do I pass it do the code_bedhing to show the user?
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