Web Forms :: Adding Text Box Dynamically On C# 2008?
Feb 25, 2010
I am working on an application, where a user will enter their primary information (Name, Address, Email, Phone etc), then enter their automobile information (usually a fleet of automobiles).
My web page currently has one row of text boxes (Car Make, Year, Model, VIN, Mileage, License Plate)
Below this is a button called "Add More Cars"
What I am trying to do here is allow the user to add more cars if they have more than one that needs to be registered.
My problem is how do I do this dynamically?
2nd problem, how do I collect the data entered by the user (for all cars), to be able to write them to the database?
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Feb 24, 2010
My C# web app requires the user to enter automobile information. The user can add information for one auto, or more (max 20).
My page has these text fields: Car Number, Car Make, Car Year, Mileage, VIN I have a button that allows the user to "Add More Cars" is to allow the user to add more than one car.
When the user clicks "Add More Cars", how can I dynamically display the text boxes, and keep track of how many cars the user has added (in order to load them to an array and write to database)
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Jul 13, 2010
I have seen code for adding columns at runtime but here is another scenario for you. I am using a SQLDatasource control for my gridview. And the data returned can have different columns based on the filter meaning one time I may have a column A1, A2, A3 and another time I may have A2, A3, A4. Is there any way I can look at the columns when it is binded at the beginning and add the columns first?
I really need to use the SQLDatasource though because I am connecting to an AS400 and it is using a connection already made in the webconfig and do not know any other way. I do if it was MSSQL server but not this.
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Jul 27, 2011
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My Datakeys are defined as "ID, CostingID". I did that so I can reference the two ID values I need when saving records.
here is the code in my RowDataBound event.
Basically if it is a datarow, I'm adding the value dataitems so I can get a sub total in the footer row.
Then, I have a boolean field called isDisbursement. So I sort my data by that field. So all records with the disbursement flag as true will display first.
Then as soon as the disbursement flag hits false I add a row to display the Total of the disbursement records value field.
All this works. My problem is, because I added a row at index 4 it inherits the datakey of the row that was at index 4 before. So when I'm looping through the grid rows to save the values I'm having a problem. I've attached an image so you will understand better what I'm trying to achieve. The "Total Disbursements" is the row I added. But it gets the following rows datakey because it is now at index 4.
when I do this, as soon as I reach row 4, although it doesn't have a CostingID it gets the CostingID of row 5 that used to be row 4:
Code:
Dim CostingID As Long = Convert.ToInt64(Me.grvCostings.DataKeys(row.RowIndex).Values("CostingID").ToString)
Dim strValue As String = CType(row.FindControl("txtValue"), TextBox).Text
Code:
If e.Row.RowType = DataControlRowType.DataRow Then
If Not IsDBNull(DataBinder.Eval(e.Row.DataItem, "value")) Then
_SubTotal += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, _
"value"))
End If
[Code] ....
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Jul 26, 2010
I am trying to figure out how to get the text value from each textbox on a page that has a dynamically created number of text boxes. I need to store that value in a database row. I guess what i need is to be able to store the text box values in a collection or arrary of some sort and then be able to use textbox(i).value or something of that nature. Not really sure where to begin.
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Oct 20, 2010
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Nov 18, 2010
I have a website built that uses master page templates. In the master page I have a simple menu in a list. This is not dynamic (yet!).
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<div id="nav">
<ul>
<li><a class="selected" href="Default.aspx" title=""></li>
<li><a href="" title="ThisPage.aspx"></li> [code]....
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Jan 27, 2010
I want to dynamically add the value of query string, taking inputs from the database and thus building a link. I want this to work in an ASPX page.
Here is the snippet of what I want to achieve:
<asp:HyperLink NavigateUrl=""></asp:HyperLink>
Here I want to dynamically build the value of NavigatUrl, I tried doing this;
<asp:HyperLink NavigateUrl="Welcome.aspx?q=" + <%= Value From My Code Behind %>></asp:HyperLink>
However, this doesn't seem to work properly.
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Mar 27, 2011
I have a custom webpart which i am adding to webpartzone dynamically.., in the custom webpart am loading a usercontrol which has Gridview in it with data. On the page load it is working fine, when i click the paging button of the gridview , then nothing is visible on the page...
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Dec 20, 2010
I have a web form that insert a City recordinto DB.i need to upload images for each city, beacuse of the relationship between city and image is 1-Many.i want to design a from that user enter city info and below that form be a fileuploadcontrol say fileuploadcontrol1, if user browse the fileuploadcontrol1, another fileuploadcontrol, say fileuploadcontrol1 added to, if user browse fileuploadcontrol1, fileuploadcontrol2 added to from and so on, so user can upload as many as files he want. i want this without postback i mean with AJAX.
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Mar 9, 2011
i am hari,i am working on asp.net 1.1,i want to update meta tag content in page load, htmlmeta isnot working in asp.net 1.1
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Dec 6, 2010
I am trying to add wizard steps dynamically in code-behind but keep getting an exception
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I found I have some fundamental error in my building, since I got this error after trying to build the simplest wizard in a new web-site just opened...
[code]....
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May 25, 2010
Is there some way that qury string variables can be added dynamically ? Suppose Page one.aspx?Id=3 redirect me to Two.aspx
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Sep 21, 2010
I have a simple user control which contains a textbox and a dropdownlist. I need to add this control multiple times to my page then save the details to my db, validating each control. When they re-enter my page I need to load the user control for each record in the db populated with the data they entered. They can then edit the data, delete the row or add new rows.
I'm trying to find the cleanest most efficient way to accomplish this. I realise I would need to re-add the user controls after each postback re-populating the data. Would the best way be to add each row to an arraylist or list of type object, save it to the viewstate and re-add the controls with data on postback, or is there another method which would suit?
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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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Here's the markup from my ASPX file...
[Code]....
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Jun 14, 2010
I am creating an application which creates pages dynamically, therefore all controls are also created this way. Initially adding a Editor part to the editorZone loads fine, as follows:
[Code]....
Where am I doing wrong here?
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Feb 2, 2010
I am using Wizard control, my requirement is when drop down list selected index change event occurs , based on the selected item I should remove or disable some side bar links. I have seen many posts removing and adding dynamically. But I could able to remove dynamically but I could not able to add dynamically. I am getting Viewstate problem.
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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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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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Jul 21, 2010
I'm trying to add a DataList to a panel and add a chart to the DataList.
[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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Dec 17, 2010
I am using Editor in asp.net application.
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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.
Now comes the question - how do I add a ddl to the datatable? I've tried several ways, but I cannot get them added.
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Jul 21, 2010
I have a usercontrol that uses a callback to update itself. If I add the control to the aspx page everything works fine. However, when i add the control using Page.LoadControl and Control.Add on a Placeholder i get the following error: "The target 'ctl00$ContentPlaceHolder1$ctl00' for the callback could not be found or did not implement ICallbackEventHandler". I tryed assigning the ID of the control also which failed with the same error. I am using asp.net 2.0.
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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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