Enter Data Using Databound Dynamically Created Dropdownlist
Jan 6, 2010
my folowwing code is generating error - selectedItem does not of string type. Basically i am unable to insert values through dropdownlist genrated dynamically.
Imports System.Data.SqlClient
Imports System.Configuration
Imports System.Data
Partial Class open_temp2
Inherits System.Web.UI.Page
Dim conn As New SqlConnection(ConfigurationManager.ConnectionStrings("ABC").ConnectionString)
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim da As New SqlDataAdapter("select partyNameID, partyName from tblParty", conn)
Dim ds As New DataSet
da.Fill(ds, "ds_tblParty")
da.SelectCommand = New SqlCommand("select quotedPositionID, quotedPosition from tblQuotedPosition", conn)
da.Fill(ds, "ds_tblQuotedPosition")
Dim I As Integer
Dim J As Integer = 1
For I = 1 To ddlNo.SelectedItem.Value
Dim MyDDL = New DropDownList
Dim MyDDL1 = New DropDownList
MyDDL.ID = "ddlParNam" & I
Session("a" & I) = MyDDL.ID
MyDDL1.ID = "ddlQuoPos" & I
Session("b" & J) = MyDDL1.ID
MyDDL.DataSource = ds.Tables("ds_tblParty").DefaultView
MyDDL.datatextfield = "partyName"
MyDDL.datavaluefield = "partyNameID"
MyDDL.DataBind()
MyDDL1.DataSource = ds.Tables("ds_tblQuotedPosition").DefaultView
MyDDL1.datatextfield = "quotedPosition"
MyDDL1.datavaluefield = "quotedPositionID"
MyDDL1.DataBind()
Panel1.Controls.Add(MyDDL)
Panel1.Controls.Add(MyDDL1)
Dim MyLiteral = New LiteralControl
MyLiteral.Text = "<BR>"
Panel1.Controls.Add(MyLiteral)
J += 1
Next
End Sub
Protected Sub btnCancel_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnCancel.Click
Response.Redirect("Default.aspx")
End Sub
Protected Sub btnSave_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSave.Click
Dim comm As New SqlCommand("insert into tblOBDDetails(specNoID, partyNameID, quotedPositionID) values (@specNoID, @partyNameID, @quotedPositionID)", conn)
comm.Parameters.Add("@specNoID", Data.SqlDbType.Int)
comm.Parameters("@specNoID").Value = ddlSpecNo.SelectedItem.Value
conn.Open()
Dim I As Integer
Dim J As Integer = 1
For I = 1 To ddlNo.SelectedItem.Value
comm.Parameters.Add("@partyNameID", SqlDbType.SmallInt)
comm.Parameters("@partyNameID").Value = Session("b" & I).selectedItem.value
comm.Parameters.Add("@quotedPositionID", SqlDbType.TinyInt)
comm.Parameters("@quotedPositionID").Value = Session("b" & J).selectedItem.value
comm.ExecuteNonQuery()
J += 1
Next
conn.Close()
End Sub
End Class
I am having Gridview ie : inside i have placeholder, So on Gridview_RowDataBound - according the Specific Condition getting from DB then - i am Creating the Dropdownlist dynamically here and assign Datasource. so up to this its ok. My Problem When the user Select any value on the Dropdownlist on Gridview ,
i have one button outside the Gridview so if i click the button i am want to get the dropdownlist selectedValue so on the Button_Click Event
i used foreach row in the Gridview.. but i do no how to get the value. as the Dropdownlist is create dynamically on Gridview_RowDatabound event. but here what i have to write to get the dropdownlist?
I need to create a TemplateField column dynamically , which will contain dropdowlist controls. I've been using this example to create my first dynamic columns and for the last column, the one that contains dropdowlist controls, I've written this class:
[Code]....
But what I don't know is, where should I populate the dropdownlist control?
I've got my Drop down list databound to an sql data source, now I need to change the data in a few of the fields before it gets displayed. I've been messing with this all morning and I can't find anything useful, this is what I've got so far and it's clearly not working.
Protected Sub ddlBookType_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlBookType.DataBound 'ddlBookType.Items.Insert(0, "Any") Dim i As Integer For i = 0 To ddlBookType.Items.Count - 1 If ddlBookType.Items(i).Attributes.Equals("mod_cook") Then ddlBookType.Items(i).Text.Replace("mod_cook", "Modern Cooking") End If Next End Sub
I am trying to select a value, automatically, out of ddlCounsellorNameb by selecting a value in ddlCounsellorID. I've been getting a databinding error whenever the first dropdownlist posts back. How do I do about this without getting an error?
I'm writing a code for a custom webpart that will retrieve data via data reader or data set (not sure which is better). In the code I will separate data into 4 categories (always just 4). Each category of data will be displayed in a tab panel, so a total of 4 tabs in the tab container. All of this is created dynamically in the CreateChildControls() method. So far I have it working for with one tab and I don't know how to separate the data into the 4 tabs.
Here the what I've got so far (simplified for posting):
_dr = bll.drGetData(id); Panel panel1 = new Panel(); while (_dr.Read()){ DataList dl = new DataList();
NOTE: This is where I think I need to branch off the data into the 4 categories but I'm not sure how to implement it.
dl.ItemTemplate = new MyTemplate(LIstItemType.Item); dl.DataSource = _dr; dl.DataBind(); panel1.Controls.Add(dl); AjaxControlToolKit.TabPanel tp = new AjaxcontrolToolkit.TabPanel(); tp.Controls.Add(panel1); TabContainer tc = new TabContainer(); tc.Tabs.Add(tp); this.Controls.Add(tp); public class MyTemplate : ITemplate{ ListItemType _itemType; public MyTemplate(ListItemtype Type){_itemType = Type;} pubilc void InstatiateIn(System.Web.UI.Control container){ LinkButton linkb1 = new LinkButton(); linkb.DataBinding += new EventHandler(TemplateControl_DataBinding); container.Controls.Add(linkb); } private void TemplateControl_DataBinding(object sender, System.EventArgs e){ LinkButton linkb = new LinkButton(); linkb = (LinkButton)sender; DataListItem container = (DataLIstItem)linkb.NamingContainer; if(Convert.ToInt32(DataBinder.Eval(container.DataItem, "id")) >= 1) {
NOTE: Although here is where the databinding takes place so I woud assume the categorization the data can take place here as well but I dont see how.
It happened to add an extra Gridveiw Header in row_databound event , It did worked fine on !Postback but disappered on Page.Postback . Quick google search guided me to move the event to Row_Created event and every thing is okay .
Can any expert post some pointers , differnces between grid row_created vs row_databount with some sample table data created dynamically behaviour of both the events in !Postback and page.Postback .
I'm creating an quiz application which queries the database and extracts the questions and choices. I use dynamically created controls such as a checkbox list and fill the values dynamically. How do I do this? Right now I have these functions:
array_random_init(); this creates a 10 element integer array from 1-20 - extract_question(i): this extracts a question indexed at i in DB, I created the controls and set the appropriate text in this function. - validate_question(i); this is called by button_click and validates the question i according to DB.
I understand I have to recreate the controls in Page_init on postback, but what should it look like? Do I need to add "if IsPostBack" in page_init, or do I create the controls in page_init() and reset their properties in page_load when I use extract_question(i)? Also, I cannot seem to clear the selected boxes on postback, I added page directive "enableviewstate=false" but it doesn't work.
I have a website that sales associates access to view account information with clients. S.A's can only view information for accounts that they are tied to. Some clients have more than one account, S.A's can be tied to more than one account, but not all accounts of one client need to be tied to one S.A.
On the account info pages, I have account numbers (dynamically displayed labels) displayed of other accounts that the account client is associated with, which the S.A's can see. I'm modding this so that if the S.A has viewing permissions of any of the other accounts on that list of accounts, that instead of a label being displayed, a button directing them to that account page will display instead. In order for this to work, I have to attach a security function to the button, otherwise the page will blow out on the S.A's.
So I'm running a piece that is displaying a button instead of a label, which is working fine. My problem is when I try to attach the security event to the dynamically displayed buttons. It seems that the page just posts back and doesn't execute my code at all.
On my Page_Load, I'm running this after the buttons and labels are displayed:
For x = 0 to tblAccountList.Rows.Count - 1 'use a try to target the button, use catch to handle if it's instead a label, only one cell per row. Try Dim accountLink as Button = tblAccountList.Rows(x).Controls(0) Addhandler accountLink.Click, AddressOf Me.PermissionViewCheck Catch ex as InvalidCastException Continue For End Try Next
I don't have any code checking for postbacks or anything like that, but the "PermissionViewCheck" event never fires and just reposts the page.
I have it setup so that when a user selects an item from a DropdownList, that some DropdownLists are dynamically created, based on the results from the Database that are returned after selecting the item in the first DropDownList.
Then, I have a button that takes the data and saves it to an object I've created for this, and I try to iterate through the Controls of the Placeholder that I added the DropdownList controls to.
However, the Placeholder says there are no controls in it, when I press the button, but I can obviously see them there.
Here is some code:
When a "Pilot" is selected, I get all of the Upgrade Types that that "Pilot" has access to, then I create a DropdownList for each type of Upgrade with all the actual Upgrades of that Type:
VB Code: For Each u As UpgradeTypeList In upgrades      Dim lbl As New Label      Dim ddl As New DropDownList       ddl.AutoPostBack = False      Â
[Code] ....
Then, when the "Add Squad Member" button is pressed, I am trying to iterate through the controls, pick out any DropdownLists and get the values from them and add them to a List Of in an object for the Pilot info:
VB Code: Protected Sub btnAddSquadMember_Click(sender As Object, e As EventArgs) Handles btnAddSquadMember.Click  For Each c As Control In rowUpgrades.Controls      If TypeOf c Is DropDownList Then        Dim DoesExist As Boolean = False        Â
[Code] ....
But, the controls supposedly don't exist and no values get added to the List(Of).
i have followed this article and created dynamic rows in gridview on button click: URL....Now i want to save the dynamically created rows data in database/
Once again i am faced with an issue. I must allow a user to add as many pieces of data as they wish. I have therefore employed some javascript from an tutorial
[URL]
I would now like to return the data from the dynamic fields through the c#(.cs page)
What I am trying to achieve:I am trying to take the value of the selected index and depending on what this value is (e.g. the case selection in the code below) run a different query on the dataset and then create a repeater control dynamically to output each row with an item template that I can use css to style.
In other words: When a user choses a list item it shows only rows from the dataset that match the list item chosen. For example if a user choses Closed Tickets they only see rows from the dataset that have a STATUS of 'CLOSED'.
What I have done so far: [Code]....
What I'm struggling with at the moment is:
1) That the case selection works but the selection of the appropriate data from the dataset doesn't seem to be happening. And this data isn't getting stored in rows as I had hoped.
2) I'm not sure entirely how to display the dynamically created repeater control in the admin.aspx page.
I have a page that I am creating 5 separate GridViews on, depending on the button the user clicks, a different GridView will show up. On a few of the GridView's there is a need for paging, so in the CodeBehind I did the following billingGridView.ID = "BillingGridView"
I am new to asp.net. I am trying to display some data from a database table using dynamic table in my page. I want to add checkboxes to a field in the database and would like to perform several tasks based on the values checked. The checkboxes are tied with the primary key field of the database. Here is the code snipet :
[Code]....
Now I have a button in my page. The functioanlity which I desire is on clicking that button I should be able to extract the values of checked checkboxes and perform some function.
I have created one user control in which I have taken a gridview. Columns of this gridview are getting generated dynamically. (i.e. I read Column name from Xml file) But now I want my first coloumn of this gridview as a checkbox field.
I have a database with some data in. Now I'm trying to show that data on my page whit a ListView.
For each object from the database a ListView will generate a dropdownlist.
I also have a DataPager on my page and this is where the problem occurs.
Each object generated from the database has a field that may look like this example.: 1,2,3.
In my code now I´m trying to split this string of comma character and add new items to my dropdownlist.
This works as long as I do not have DataPager on. But if I choose to view an x number of pages at the time when the page loads, I have value in the dropdownlists, only on my first page.
I want to create a gridview with the first column being the Job Number and then a variable number of subsequent column which are fordates. This grid is a data entry for hours worked on a particular date for a particular job. I wrote the code to get the correct number of columns and column headers but I am having trouble getting textboxes into the grid cells.
public partial class _Default : System.Web.UI.Page { #region constants
i am working on Accounting software.in this software i am to implement voucher entries form.In this form on page load a table (two rows and four columns) should be created after that one row should be appended to that table dynamically on button click event.
I have a listview control which is created dynamically, it is nested inside a repeater's itemtemplate. I'm trying to attach a datapager to it, which is also created dynamically but the datapager will not display and the listview will just display all its records in its entirety.
I have a menu. I use the menu's menuitemclick event to create a gridview (several actually) that is then added to a panel for display.The gridview paints perfectly until I try to add paging.I have successfully used paging and sorting declaratively for years, but this is my first attempt to do everything in code.When the gridview tries to databind, it throws an error:
[NullReferenceException: Object reference not set to an instance of an object.] System.Web.UI.WebControls.GridView.get_StateFormatter() +25 System.Web.UI.WebControls.GridView.BuildCallbackArgument(Int32 pageIndex) +56
I am creating a project that dynamically creates radiobuttons. So far, i'm done with creating those radiobuttons dynamically. My problem is getting the values from those radiobuttons. To get those values, I need to click the submit button, however it seems that the radiobutton value or the radiobutton itself is lost after I click the submit button.
here are my codes, though not my exact codes, it follows the same logic...
