Web Forms :: Dynamically Adding Controls To A Table Across Multiple Functions?
Mar 13, 2010
I'm looking to add controls dynamically to a table across multiple functions. I'm trying to convert this from a C# app to a web app using asp.net, though this is my first time using asp.net with no web development background. I read the creating tables dynamically in the FAQ but I'm still not sure how to do this.
When pressing the submit button on my form, it will create a table in a place holder. Eventually I would like it to generate urls based on the users input and do this in a function other then the one I created my table in.
In my C# app I was able to add text to a listbox using: lstOutput.Items.Add("Text"); across multiple functions but I'm having trouble doing this with a table.
I understand that my table is a local variable in the submitButton_Click function, but how do I make it global to add rows, cells and controls to it in other functions?
My current code which doesnt work:
[Code]....
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Apr 19, 2010
I need to let my user add rows dynamically to a table, and after doing some research, it seems the best way to do this is through a GridView bound to a DataTable. However, I'm really struggling adding dropdownlists to the datatable, and this showing them in the gridview.
Here's the design I want:
ddl1 | ddl2 | ddl3 | ddl4 | ddl5 | ddl6 | ddl7 | textbox
When the user opens the form, he or she will be presented with one row. ddl2 etc will be populated when ddl1 is selected etc etc. When appropriate, the textbox will be enabled allowing the user to enter a comment (this is to report errors, and since users are, at best, not to trust to write the same thing twice, I need to use ddls.
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Dec 22, 2010
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Date From Date To Place Days
12/12/2010 14/12/2010 Mumbai 2
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12/12/2010 20/12/2010 Pune 8
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May 21, 2010
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my code...
[Code]....
[Code]....
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Jan 29, 2010
I have one table control "table1"
And added controls to it in click event of one button as :
[Code]....
but i cant retrieve this controls in click event of another button. i think it is because of postback.
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Dec 4, 2012
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Jun 29, 2010
I wanted to know if it is possible to dynamically add columns to a table in the Database?I know how to create a table dynamically in the DB the code for it is given below, howver I do not know, how do I add columns to it dynamically.
Dim NewTable As String = "CREATE TABLE Dynamic " +
" (" +
" job_id smallint" +
" IDENTITY(1,1)" +[CODE].....
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Sep 21, 2010
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Dec 1, 2010
I am using ASP.NET3.5, I want to Add rows dynamically to a table.I have written this code.This code is working fine if the Page is not having masterPage file. If I use masterpagefile in my ASPX age,controls(textboxes) are displaying at bottom of the page,and the data in textboxes is not retaining after click on Add button.Disaapering the text box values. My .Aspx:
[Code]....
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Oct 19, 2010
I have been google some but I canīt find any solution that have been worked for me. I do use System.Net.mail on my site to send emails to individual employes. Now I would like to be able to email all emplyees. The emplyees email address is stored in a MS SQL table. Is it possible to make a BCC email to all employees in that table?
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Jan 13, 2010
I've been searching for hours trying to figure this out. I understand that somehow I need to recreate the control in page_load. I think seeing the code will let us better understand what I'm trying to do.
[Code]....
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Mar 7, 2011
I have the following code, i add code for required validator, but when you make selection from dropdown to create the table, the page generates an error. Should the logic be somewhere else to add it to the table? i mean, dont they have to be there so when you submit the form, it fires the validation?
[Code]....
Here is the error that comes up, when i make a selection from my dropdown that creates the table.
Line: 938
Error: Sys.WebForms.PageRequestManagerServerErrorException: Control 'rfvtxtCam1' referenced by the ControlToValidate property of 'rfvtxtCam1' cannot be validated.
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May 25, 2012
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Jun 21, 2010
I have a table with 4 cells and three rows. All rows have a textbox in it. I have a button at the top. I want to add a new row in that table when that button ic clcikded with same formatting as above row. Above row format is like this.
<tr valign="top">
<td>1.
</td>
<td align="left">
<asp:TextBox ID="txtC1Fname" runat="server" Width="150px"></asp:TextBox>
</td>
<td align="left">
<asp:TextBox ID="txtC1LName" runat="server" Width="150px"></asp:TextBox>
</td>
<td align="left">
<asp:TextBox ID="txtC1DOB" runat="server" Width="150px"></asp:TextBox>
</td>
</tr>
How Can I do this ?
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Nov 14, 2010
how I can add outputs to my vb.net functions? The reason for this is that I have functions which return data tables for grid views. But I also want to pass a return value back to the calling routine, so that it knows whether the function succeeded or failed. It would also be good to pass strings back too, in addition to the returned data table.
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Apr 20, 2010
I am returning an IList to my model of data about users. I want my end users to be able to select which columns they want to see.
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Mar 23, 2011
my requirement is i want to add education details having three fields
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Jan 3, 2010
I am fairly new to ASP.Net and web programming in general and I am having issues trying to add values from a dropdown list in my gridview to another table.
Here is my scenario. I have 2 tables in my SQL Express DB. When editing the values of table2 in a gridview, I would like to show some data from table1 in a dropdown so users can select a value from table 1 and enter that value in table 2.
I have the Gridview setup to show table2 data.
I created a field template and inserted my dropdown list and linked it to my table1 data source.
When I run my web form, I can click to edit one of the fields in the gridview, and my dropdown list correctly displays the data from table 1, but when I try to update the table2 with the dropdown value, it doesn't correctly update. The row in table2 never updates.
posting the dropdown value from table 1 into the appropriate field in table2..
Again, I am new to this and have been following the tutorials etc on this site, but can't find one pertaining to this topic.
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Jul 29, 2010
Protected Sub btnAddRow7_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnAddRow7.Click
Dim tableRow As New System.Web.UI.WebControls.TableRow
Dim tableCell As New System.Web.UI.WebControls.TableCell
Dim textBox As New System.Web.UI.WebControls.TextBox
tableCell.Controls.Add(textBox)
tableRow.Cells.Add(tableCell)
tbl7.Rows.Add(tableRow)
End Sub
but it only adds one row dynamically. After the first addition, more clicks to the button will not add more rows.
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Dec 4, 2010
I am using silverlight, vs 2010, and need to write some basic functions.
Some of the functions are getting a string and find if it's odd or even, and some of them getting status from database.What is the best way doing so : Javascript, ASP.NET, AJAX?
Need an example of code, that also include some dlls/assemblies,
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Feb 21, 2011
I've scenerio where i've two dropdownlist box (one dependent on other, displays handset brand name and on selection displays the respective model name), two combolistbox which is bounded to their respective datasource(Displays the fault and accessories).
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These controls are present in datagridview EditTemplate
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Sep 5, 2010
I am new to ASP.NET And I am have THE hardest time understanding how to work with forms in ASP.NET. Here's what I am doing:
Dynamically add User Controls to a PlaceHolder based on some int value (which currently is passed in a HiddenField).Fire an event if the WebControls inside of the User Control change, then handle that event in the Main Page (i.e. save the input to DB)When the user clicks the "Next/Continue" button, the next controls for the next page are loaded. And I guess maybe I just can't seem to get how things work in ASP.NET, because I am really struggling with the general idea of how ASP.NET flows.
Should I be dynamically loading the controls in Page_Init, or Page_Load? Or should I load the controls when the buttonclick event is fired?Do I have to add the axCtrl.OnDataChange += new EventHandler(HandleAxControlDataChange); line on Page_Load? Or should I put this in When I first load the UserControl, I need to initialize some WebControls within the UserContorl. Is there a way to know if I have loaded new user controls into my placeholder? I can't use Page.IsPostback, because after the first page, every page is a postback from the buttonclick.
Here's what I have:
[Code]....
[Code]....
[Code]....
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[Code]....
Here's the markup from my ASPX file...
[Code]....
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Feb 6, 2010
I need to set some attributes on user controls that I'm dynamically adding to a page placeholder. Is this possible?
[Code]....
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Mar 15, 2010
I have a page where a user can add any number of a specific custom control by clicking a button and delete any of them by checking a "delete" box and clicking the delete button. This custom control has a dropdown, 3 radiobuttons, 2 text boxes and 2 checkboxes. The anomaly occurs when you add at least 2 controls, then delete any of them but the last one.
When each control is rendered the name and id attributes are autoincremented to make them unique however, in the above casewhen the custom control is actually renedered to the page the name attribute has an index that is 1 higher than the id. For example:
here is the name and id of the problem radio button: name = ctl00$ContentPlaceHolder1$PreOpUpdatePanel$PreOpStatcompareinout1$AllInOut but the id = ctl00_ContentPlaceHolder1_PreOpUpdatePanel_PreOpStatcompareinout0_All
Now I am sure that I am doing somethign wrong but I just do not know what. Since the controls are added dynamically I have to recreate them on each postback so that the postback data can repop the fields. However, when the user deletes then the postback event makes me recreate all of them, then I have to remove the controls the user requested to be deleted. At this point the auto generated index is incorrect so the nextpostback will lose the data so I have to manually renumber the control IDs. Now this seems to work on all other controls within my custom control except for the radio buttons.
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Apr 12, 2010
I think I summed up the question in the title. Here is some further elaboration...I have a web user control that is used in multiple places, sometimes more than once on a given page.The web user control has a specific set of JavaScript functions (mostly jQuery code) that are containted within *.js files and automatically inserted into page headers.However, when I want to use the control more than once on a page, the *.js files are included 'n' number of times and, rightly so, the browser gets confused as to which control it's meant to be executing which function on.What do I need to do in order to resolve this problem? I've been staring at this all day and I'm at a loss.
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