DetailsView ItemUpdate / Not Being Able To Retrieve The Updated Values
Oct 24, 2010
I have been struggling with DetailsView for quite some time.
Only chkActive and txtStatement in the code below are Editable. So when I click Edit, edit the fields and click Update, it does go to the ItemUpdating event, but I'm not being able to retrieve the updated values.
I get error-
Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.Label'.
I'm using a detailsview control to update a record, however in this particular case there's only one field that can be changed out of a many. The update method for my object takes all fields as parameters. When the detailsview's updating method fires, the values for the readonly fields (those rendered as a Label) are not available in the e.NewValues collection.
I'm currently grabbing a reference to the object when the detailsview is databound (in the objectdatasource selected event handler), storing it in session and manually adding entries to the e.NewValues collection when updating fires. It works but seems kind of heavy handed. So, is there a better way to get the read only values back into my update method? Or is there a better way of doing this altogether?
Updates to the edited item are not passing the new / updated values but rather the original values. And I can't for the life of me figure out why when I change the original value in an edit textbox and post the update the new value is not being passed. I get the original value. Perhaps fresh eyes can spot the problem. This should be super basic but apparently I'm missing something.
Here's the code for the Item and Edit templates. The code behind is below this.
For my project, i have decided to use AjaxControlToolkit's ModalPopup controls. I have obtains codes from this website: [URL] After following all the steps provided by Matt, I am getting some problems when i want to save my edited information. Scenario 1: Select the first item from the gridview, modify the details at the details view and click save, gridview updates and shows the edited information and it is stored into the database.
Scenario 2: Select the second item onwards from the gridview, modify the details at the details view and click save, screen remains at detailsview and edited information is not saved, click cancel button to return to gridview, data at the gridview was not updated. So basically, the update function works only for the first item from the gridview. The following is parts of my code:
<%-- Display list of Activities according to the Project--%> <asp:UpdatePanel ID="UP_ActList" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:GridView ID="GV_ActList" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDS_ActList" DataKeyNames="dbID" OnSelectedIndexChanged="GV_ActList_SelectedIndexChanged"> <RowStyle BackColor="#EFF3FB" /> <Columns> <asp:BoundField DataField="dbID" HeaderText="dbID" Visible="false" SortExpression="dbID" ReadOnly="true" InsertVisible="False" /> <asp:BoundField DataField="ActID" HeaderText="ActID" SortExpression="ActID" />
.......Other BoundField were deleted for this post purpose............
I have a DetailsView Control, inside as a template a TextBox. I need to findout the value for a TextBox when Inserting data Event handler-, _ItemInserting. The script does not work.
protected void uxInsertAuthor_ItemInserting(object sender, DetailsViewInsertEventArgs e) { //// Find control on page TextBox myAuthorProfile = (TextBox)uxInsertAuthorInput.FindControl("uxContentAuthorDisplayer"); // Set a default value in Data Base if field has been left empty (DB field NOT NULL) if (string.IsNullOrEmpty(myAuthorProfile.Text)) { string myAllert = "Field is NULL"; } else { string myAllet = "Field is NOT NULL"; } }
I've got a gridview connected to an objectdatasource which is bound to some custom objects in my code (code is below). The problem I'm having is that the value passed into my update method is the old value, not the new value. Thoughts?
Partial Public Class ManageUsersControl Inherits System.Web.UI.UserControl Dim auth As AuthenticationSection Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Users.DataBind() End Sub End Class
Public Class Users Private sName As String Private sPassword As String Public Sub New() End Sub Public Sub New(ByVal nm As String, ByVal pass As String) Name = nm Password = pass End Sub Public Property Name() As String Get Return sName End Get Set(ByVal value As String) sName = value End Set End Property Public Property Password() As String Get Return sPassword End Get Set(ByVal value As String) sPassword = value End Set End Property End Class
Public Class UserData Dim auth As AuthenticationSection Shared userTable As List(Of Users) Public Sub New() auth = CType(WebConfigurationManager.GetSection("system.web/authentication"), AuthenticationSection) End Sub Public Function CreateData() As List(Of Users) Dim dt As New List(Of Users) For Each user As FormsAuthenticationUser In auth.Forms.Credentials.Users dt.Add(New Users(user.Name, user.Password)) Next userTable = dt Return userTable End Function Public Function SelectMethod() As List(Of Users) If userTable Is Nothing Then Return CreateData() Else Return userTable End If End Function Public Function UpdateMethod(ByVal userInfo As Users) As Integer Dim user As FormsAuthenticationUser = auth.Forms.Credentials.Users(userInfo.Name) Dim pass As String Dim sha As New SHA1CryptoServiceProvider() Dim enc As New System.Text.ASCIIEncoding() pass = enc.GetString(sha.ComputeHash(enc.GetBytes(userInfo.Password))) userTable.Add(New Users(userInfo.Name, pass)) user.Password = pass Return 1 End Function End Class
I have a hidden variable and its value is being updated using javascript(client side) which I make a call from server side code. After making the call I am not able to retrieve the updated value from Server side variable. I went through this forum [URL] but not able find a way how to implement functionality with IFRAME. I am trying to call the client side code and retrieve the updated value from server side in page_load event.
I have data entry form like...There are some empty rows and some of them have values. User can Update existing values and can also fill value in empty rows.I need to map these values in my DB table and some of them will be inserted as new rows into the database and existing record will be updated.I need your suggestions, How can I accomplish this scenario with best approach.
I have a ListView control that is inside of an update panel. I have a Button control that calls code behind when clicked and I have a trigger in the update panel that is triggered based on the click event of the button. The button that calls the code behind and inserts a record into the database works fine but I get a full page refresh and the ListView Data is not updated as expected. I then can go to another page, come back and the new data is there. I'm not sure what I missing. Please see the code below.
I am trying to retrieve Detailsview records filtered by dropdownlist which is populated within Detailsview template.
not sure if this is possible but,
i have three cascading dropdownlists within the detailsview and want to set the third dropdownlist value and dependant dropdownlist values according to retrieved record.
at moment they cascade values independant of what record set is retrieved in detailsview and obtain there parameter from selected dropdownlist in pagebehind.
below is select statement bound to Detailsview and itemtemplate for third Dropdownlist control
I am using ASP.net MVC for the developement. My Model class looks like
class MyModel { string name; string desc; string[] labels; }
When I bind this model to the view, all the values are displayed on the view successfully. But on Postback method public ActionResult MyPost(MyModel obj) obj.labels is null whereas name and desc contains updated values. why is it so?
How to retrieve the particular row of detailsview into textbox on page load event if details view defaultmode is readonly i want to retrieve the email id from detailsview email row in textbox1 on page load event ?
I really have a big problem(stuck) with two dropdownlists inside a detailsview.I have 4 detailsview : DdlRt,DdlRt2,ddlMobv1,ddlMobv2. Basically what happens here is that DdlRt2 gets populated when DdlRt is selected and ddlMobv2 gets populated when a specific value from ddlMobv1 is selected.
In code posted above the detailsview has a "Update" command and the problem is when the update command is executed the data is successfully posted to the db BUT! THE VALUES from DdlRt2 and ddlMobv2 dissapear! And I can't insert any more Items. The only Item that stays in these two dropdownlists is the default "Select Department" item which is't set in codebehind but is set in .aspx.....I can't figure what I'm doing wrong here It must be something with databinding & events.
So my question is "Why can't I insert any more items to these two dropdownlists after the "Update" command on the DetailsView is set or how can I preserve the values that are already in"?
Is there an easy way to trim values in a details view during edit mode? I tried modifying the database query to trim the values, but it didn't like to do both ways databinding after that. I tried looking through all the properties of the text boxes themselves and found nothing. I know I could add an event handler for the databound event, and set all of the values one by one, but this is an application that has existed since before my employment and there are over 40 values in this details view, all in text boxes with seemingly random names that have little to do with the values they represent or obvious naming scheme.
I thought maybe there was a way to way to iterate over the DetailsView.Fields property, but couldn't figure anything out there either. I am not allowed to change the schema from CHAR to VARCHAR either. Any other quick ideas? There is a strong likelihood this page will change again, and I would like something that might take care of this problem for any new fields added in the future without extra work. Unfortunately, redesigning it is not anywhere near a top priority right now, so a quick fix to alleviate some of the headache of using this monstrosity is all I am looking for.
I have a problem I have been googling the entire day and still have no soloution. I have a detailsview with 2 dropdownlists. Fisrt one is ddlCaregory. Second is ddlSubCategory. The value is passed from the first ddl to display the SubCategory linked to ddlCategory. Both ddlCategory and ddlSubCategory are Templatefields. This is also in VB.
The Details view has a sqlDataSource (sdsApplicants), ddlCategory has a Datasource (sdsCategory) and ddlSubCategory (sdsSubCategory). ddlCategories lists the data returned from sds Categories and save any changes to sdsApplicants. I can get ddlSubCat to display the correct SubCatagory bases on ddlcategory sesection but as soon as I try bind it to sdsApplicants I get the following error
'ddlSubCategory' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value
I have a simple web app built in asp.net webforms c#where and how would be the best way to save info from the code behind?(and also retrieve that info)eg all i want to save is a dateTime. and a flag set to True or False.and be able to access them in the code behind.Im not using a db for this web app.Edit: and can't really use session variables for this purpose.
how to retrieve a value from a typed dataset. I am trying to retrieve a value from a row within a row return from a tabale adapter method. Example:
Dim transAPI As New PN_TransactionBLL() Dim trans As PN.RetrieveGEmailDataTable = transAPI.getGEmail(itemtId)
The tabeadapter method retrieves 1 row of data and I would like to pull the values retrived such as "trans.rowproperty"(if thats the correct syntax) where "rowproperty" would contain the actual value returned.
