I need a complete code reference for Detailsview and Formview using the code only:OnRowCreatedOnRowEditingOnRowUpdatingOnRowDeletingOnRowCancelingEditOnPageIndexChanged OnPageIndexChanging OnSorting OnRowDataBound
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I have a parent table and a child table. Essentially the parent table is called Contracts and the child is called Programs. Each Contract can have multiple Programs and in the Programs table I have a column called amount. On my page I have created a DetailsView that lists the columns of the Contract table. I would also like to include on this DetailsView a field that sums the Amounts column of all programs associated with this contract. How would I go about doing this? Currently I have a LinqDataSource that pulls all the columns from the Contract table and I have bound the DetailsView to this datasource.
View 1 RepliesIs Sqldatasource powerful? Is there any disadvantage using it over other controls?
And How to use Sqldatasource from code behind with datacontrols like gridview,detailsview and formview?
Is it possible to completely customize the gridview using sqldatasource from code behind?
Is there an equivalent of the GridView.RowDataBound event for the DetailView and FormView controls in ASP.NET 3.5?I need to manipulate data after Selecting it from my database, but before it gets presented to the user. I've read the documentation but I think I've missed something because I can only find FormView.DataBound which is called after the entire control has been data bound. Something like an ItemDataBound event would be what I need....?!?
View 6 RepliesI have a dropdown in the InsertItemTemplate of a FormView that I need to add code to it's SelectedIndexChanged property, however I can't seem to find any way to do this.
For example, if the dropdown was not in the FormView I would simply use...
[Code]....
...but because it's inside the FormView I can't use the above.
i have a webform to take user inputs. i am able to insert the data into database on clicking add button and also able to view the
records in the detailsview which is in the next webform.I have a edit and delete button in detailsview.
Now when i click edit button, i want the selected record from the detailsview to be populated in the first webform where i can update the record. also deleting record using delete button.i am using c# code,datatable and oracle stored procedure here.
I've been playing with a certain detailsview for most of last week. This particular control is located within a panel that is hidden until a user clicks a linkbutton on a gridview. Then the panel's visible property is set to true and the detailsview is populated based on the commandargument passed through the link button. What I've discovered is that with each postback, the datakey or control parameter, still not sure which or if both, is lost. I've discovered a lot about ViewState and how controls work and am a bit surprised that something as common as using a detailsview within a gridview wouldn't be handled better than it is now. I have been able to get the proper information to build a correct select statement when the user decides to edit a record. I am now working on an update statement, but for some reason while I have the right key to update the right record, I am unable to access the user-generated data that was entered in the details view.
For instance, I select record with ID of 1 in the gridview. It pulls up the detailsview and I can view it. I then click edit. The correct record is still there. (It was previously going to default). When I enter new text in a textbox and click update, the app still knows I am working with record #1 but doesn't seem to be able to find the textbox control. I have currently hard-coded a value into the field just to see if I could actually get the record to update and it did. I am using an OnInit to cause the sub to run and think this might be the problem. However, I have been unable to find a better way around this.
Here is the sub that executes on the OnInit() of the detailsview:
Protected Sub notes_binding()
If notesDetail.CurrentMode = DetailsViewMode.Edit Then
sqlNotesUpdate.UpdateCommand = "UPDATE [Oilchange_Notes] SET [notes] = '" & CType(notesDetail.FindControl("notes"), Textbox).Text & "' WHERE [vehicle_id] = " & Session("unitNumVal")
sqlNotesUpdate.UpdateCommandType = SqlDataSourceCommandType.Text
sqlNotesUpdate.Update()
End If
sqlNotesUpdate.SelectCommand = "SELECT * FROM [Oilchange_Notes] WHERE ([vehicle_id] = " & Session("unitNumVal") & ")"
End Sub
And this is the error I get: Object reference not set to an instance of an object. If I'm correct about why it's not pulling the actual value or even acknowledging the control exists and is actually 'notes' (it is), then at would point would be the best to place this code?
I have a radiobuttonlist in a details view. Databinding is happening in PageLoad (if not IsPostback), after a details view item is inserted, edited and upon clicking cancel when in edit mode.Everything works well except when clicking cancel which for some reason the radiobuttonlist appears as empty. The code is surely working because up till OnPreRender the radiobuttonlist contains the required items. However OnRender the list appears as empty.
View 1 RepliesOn my formview I have a drop down list that is populated with the names of the files in a certain directory. This works fine, but when the drop down list selected value is bound to the database field I get the following error :
'ImageFileDropDownList' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value
I have setup other drop down lists in the same formview populated from SqlDataSources and these all work fine. I can see perhaps why this is an issue because I have not specified a DataValueField or a DataTextField for this drop down that is populated in code (whereas I can for the SQL bound ones) because I'm not sure what these settings would be.
I need to have a "blank" option as well so that the field does not default to the first value in the list.
My code (I have stripped out some meaningless controls) :
[Code]....
My code behind populating the ddl :
[Code]....
I want this code to work in a DetailsView -
[Code]....
I have a details view in asp.net which I am dynamically replacing some of the controls using code behind (e.g. converting some text boxes to dropdowns). My problem is that I am unsure how to bind these to the field from the database on postback. I.e. I am trying to find the code behind equivalent bind('currency');
I can populate the dropdown with the current value from the database but cannot find how to save a new value on updating the detailsview.
I select a item from gridView and trying to show/update/delete in From view. In Form View I am using the dropdownlist filling it in Code behind. Then i bound the list. But the problem is it is not showing the slected value. Here is the code
asp code <asp:GridView ID="grdVRegion" runat="server" AllowPaging="True"
AutoGenerateColumns="False"
Width="525px" PageSize="20" DataKeyNames="intPKCountry_DetailID" [code]....
I have a formview with many textboxes, dropdownlist, labels etc. I want to populate these fields using code and not a datasource.
View 1 RepliesI'm trying to add an DropDownList to a DetailsView by code, because i'm writing a solution that let's the user select an table and view your records and edit them, some of theese tables, have a foreign key column and the user must have to select some item in the list.
Below is my sample code:
[Code]....
the code above is working correctly, when the user click in the buttons New or Edit , the DetailsView opens correctly, showing the DropDownlist, but when the user click in the buttons update or insert , an error occurs, the viewState cannot be loaded:
Failed to load viewstate. The control tree which viewstate is being loaded must match the control tree used to save viewstate during the previous request. For example, when controls are added dynamically, the controls added during a post must match the type and position of the controls added during the initial request.
I have a detailsview bound in the code behind file. I want to format the column headers. How can I do that in the code behind file.
SqlCommand Cmd = new SqlCommand(SQLquery, connection);
SqlDataReader Dr = Cmd.ExecuteReader();
dvEstQty.DataSource = Dr;
dvEstQty.DataBind();
Cmd.Dispose();
connection.Close();
connection.Dispose();
I have a very complex page with 11 formviews, 1 dropdownlist, and 11 sqlDataSources.I have several issues
Page: This page controls my website users and their info. There are 2 different users with 3 different permissions; users - 1 Primary(account Creator), and the rest; Permissions - View, Edit(Manage), Create/Delete(Author)
Each Formview controls one column in the table.
1st. After Permissions are read, the add, delete buttons are to be disabled if no permission. If the User selected is the PrimaryUser the delete button is disabled. On Page load, the delete button is enabled even though the displayed user is the Primary, when you select another user, then select the primary again, the delete button is disabled, but when you select another user the delete button is still disabled. This should not be!
2nd. I then added a check to see if there was one or more locations, and if there is only one, then disable the edit button that allows a user to assign a user to a specific location. example: if there are 3 locations, you may assign a user to that office location, but if there is only one location, there is no need. I try to disable the edit button in formview, but I get "object reference not set to instance" which is total cr#$ because the button is there in the form.
3rd. When a page loads and all of your sqlDataSources have a Select controlParameter that is determined by a DropDownList, how is the initial record determined other than it is the first record?No matter how I work my code, these issues do not work, and it is very frustrating and holding my project back. I have been working on thes for a week.
[Code]....
I am trying to arrange the information from a SQL record into a 3 column by 3 row table to fit the form presentation that I want. I have placed on the page 3X3 table and then tried to place a detailsview in the first cell for the first picture called P1dv.
I have place a detailsview in the last cell that would control the paging of information called Controldv. I need to fiqure out how to link P1dv paging to Controldv page action. I am using visual web dev. 2005. I am not updating or editing these are read only views.
example of what i need the form output to look like:
picture1 picture2 picture3
name1 name2 name3
Contact1 contact2 contact3
what i ave coded as of now:
[Code]....
I´m trying to link the gridview to detailsview and I used this page as my inspiration:
http://quickstarts.asp.net/QuickStartv20/aspnet/doc/ctrlref/data/detailsview.aspx
But I´m trying to do that programmatically, not with the sqldatasource. So I wrote the method that binds data to Detailsview and I call it in the page_load. The problem is that I have to click two times on the select button to view the detailsview. The first time I click on the select button nothing happens.
I have a gridview with a Select button. Clicking the Select button for a particular item, I need its full details displayed in DetailsView. how I can bind to DetailsView? Here is what I have so far.
.aspx
<asp:GridView ID="GridView1" runat="server" AllowSorting="True" AllowPaging="True" PageSize="10" OnPageIndexChanging="countryGrid_PageIndexChanging"
CellPadding="4" ForeColor="#333333" Width="400px" Font-Size="9pt" [code].....
I would like to ask if it is possible to access data on a master FormView from a nested detail FormView.
I have a main form (master) with several tabs (detail) and would like to display a label with text from main form that is hidden by the tab at the moment of editting. My asp page looks like this.
[Code]....
Is it possible to get the value of the label CompanyTextLabel from CompanyTextBox using just ASP.NET expressions or something similar without writing c# code in .cs file?
I have a nested formview. I need to set a value for a textbox when I'm in insert mode from parent formview which is editmode.
View 4 RepliesI have a formview that use the formview iteminserted event. The information inserts into the formview fine, but all cells blank out after the insert. How can I make it so I can show all the values I have inserted show up in the formview after the inteminserted event?
View 2 RepliesI'm a learner..i like to create a program like gmail or any other mail service provider like yahoo..outlook..how to create a program using tree view control?
View 4 RepliesI have a page with a FormView on it. The page is strictly for adding records to a Table. I have the FormView bound to an EntityDataSource and everything works greate except for one thing.
I want to initialize a date field in the FormView to today's date. So, in my page_load event I have:
if (!Page.IsPostBack)
{
//Initialize SetupDate to today.
TextBox setupdate = (TextBox)fvJob.FindControl("txtSetupDate");
setupdate.Text = DateTime.Now.ToShortDateString();
}
The first time this page loads, the txtSetupDate field is initialized.
Although, and subsequent loads of the page doesn't initialize the Text Box. I step through the code in the debugger and I can see that the code is executig, but something (the FormView bind?) is "clearing" the Text Box.
In my office I am the only Web Developer. There are no other Web Developer.
I was confused by my co-worker programmers regarding the meaning of Code Behind. They told me there is no such Code Behind.
highlight which is CodeBehind from these 2 sets of sample coding:
these are from HTML
[code]....
Of the 2 sets of sample cpding which one is called CodeBehind ?
