Is there an easier way to prevent a duplicate insert after refresh? The way I do it now is to select everything with the all fields except ID as parameters; if a record exists i don't insert. Is there a way to possible detect refresh?
View 8 RepliesHow do I prevent a duplicate entry from a text field by using SQL Query?
View 3 RepliesI have a form with 4 textboxes. How would I prevent the user from entering a duplicate value upon keypress?
View 8 RepliesHow Can i prevent duplicate record entry in vb.net.
View 3 Replieshow to prevent duplicate RECORDS in datagridview cell vb.net
View 2 RepliesHow do I prevent users from a inserting a duplicate value using SQL Query
datatype is VarChar(50)
e.g. the name field has already been defined as "Josh", I don't want it to be able to add another "Josh"
There is PreviewKeyDown but I don't know how to prevent it from passing the keypress to the browser using that method & WebBrowserShortcutsEnabled will disable them but not allow other stuff like Control+C,Control+V and even the delete key in a textbox wont function as well as technically any F keys will not be passed to the flash I have running in the web browser control so the reason for disabling was made moot because the keys still aren't usable in the flash game either because they don't function at all anymore or it has an action already(F5-refresh)How do I disable it without stopping it from being used by the underlying webpage - flash in this example....
Return returns execution to it so it ends up calling keydown like normal, there is no actual keydown event for the webbrowser control or id use that....I cant block navigation because a refresh appears to not call any of the navigation stuff....End stops execution of the whole program it seems, not just stopping that part of code in its tracks...Stop just pauses the program in the debugger....Exit has the same result as return does....
Is there no way to either use PreviewKeyDown to not return execution to the caller....or maybe some kind of await procedure(visual Studio 2011 & its await procedures/async procedures) or something which will never finish... them using it a lot(the F5 key) wont use a lot of cpu while it waits for something that would never happen....Or just any other method which could make this work how I need it....
I need to disable a button after its pressed so the user does not have the ability to click it again as this would replicate the process in some cases.After alot of searching I found some tips - alot of code I found I could not understand.This is what I have come up with:
On page load:
If Me.Page.IsPostBack Then
'lblDetails.Text = "disabled"
[code]....
I also read somewhere that I should use: System.Threading.Thread.Sleep(1000) to delay the process or something - not entirely sure why I would do this though.Although, the problem with my above code is that when the code behind page performs validation checks, it exits sub before executing my INSERT SQL code - so when it does this it also disables the button.I am not entirely sure if the above method is fool proof or whether it is a **** piece of code that won't work 100% of the time.On another website I found a script to put on the actual HTML page with <script> tags:
Code:
<script type="text/javascript">
disableSubmit(frm) {
[code].....
Every time I refresh the browser, my button's event handler fires again. How do you prevent this?
View 2 Repliesprevent a button serverClick event from firing on page refresh?
Markup:
<INPUT id="btnGo" type="button" value="Go" runat="server">
VB.net:
Public Sub btnGo_ServerClick(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles btnGo.ServerClick
The btnGo_ServerClick function needs to fire on the button click, but not on page refresh.I've tried using IsPostback, but that is always true- even on the button click.N.B. I'd rather not go into the reasons behind why I'm using a serverclick, rather than an asp:button and a click event. Suffice to say it just isn't suitable for I am doing.
I need to disable a button after its pressed so the user does not have the ability to click it again as this would replicate the process in some cases. After alot of searching I found some tips - alot of code I found I could not understand.This is what I have come up with:
[code]...
I also read somewhere that I should use: System.Threading.Thread.Sleep(1000) to delay the process or something - not entirely sure why I would do this though.Although, the problem with my above code is that when the code behind page performs validation checks, it exits sub before executing my INSERT SQL code - so when it does this it also disables the button.I am not entirely sure if the above method is fool proof or whether it is a **** piece of code that won't work 100% of the time.On another website I found a script to put on the actual HTML page with <script> tags:
[code]...
But although this works, it does not execute my VB code in the code behind page so I am a little confused where to go here.
I have script like this :
Private Sub cmd_save_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmd_save.Click
If txt_kdbrg.Text <> "" Then
[Code]....
give me alternative script, if object is duplicate script give alert or message "already exist"
i'm using below code to save data to sql but i need to save the new data only not all data
table name :
CHECKINOUT
key :
CHECKTIME
[Code]...
I have a form where two fields on the first page of the form make up the primary key. I want to check for duplicate values before attempting to insert the record, since I don't want the user to go all the way through the form only to find out they can't submit it. So I'm trying to check for duplicate values when the user tries to go to the next page of the form. I wasn't quite sure how to do it, and sure enough I'm getting an error. ("Object reference not set to an instance of an object.") The problem is apparently in my if statement, "If myValue.Length > 0 Then", but I'm not sure what needs to be in place of that.
Protected Sub CustomValidator1_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles CustomValidator1.ServerValidate
'get values
[code].....
I have two table, src_table and dest_table src_table contain multiple rows including duplicates I want to copy rows from src_table to dest_table without duplicates.
View 3 RepliesI have a grid but it does not refresh after i enter data into the table.
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="DriverID"
DataSourceID="SqlDataSource1" EmptyDataText="No Data">
[Code].....
How to make only one record at a time get inserted in the database table and also delete from the other table?
Once the details are filled ,I insert it in table1 as the new record and I delete the same record from table2.[code]...
Is there any reason to favor one of these approaches over the other when inserting into a generic dictionary with the possibility of a key conflict? I'm building an in-memory version of a static collection so in the case of a conflict it doesn't matter whether the old or new value is used.
If Not mySettings.ContainsKey(key) Then
mySettings.Add(key, Value)
End If
[code].....
My environment: VS2008/VB using Data Sources (datasets, binding sources, table adapters) to interact with MS Access 2007 database.
My application: A Master form displaying a 4-level hierarchy of data using listboxes instead of grids. Data source for each listbox is a query containing child table data and a stub (foreign key provided by a cross-reference table) to parent record.
Processing: User double clicks Listbox on the Master form to call a popup form bound to child table (to enable data entry). When popup SAVE is clicked, new data is saved to Child table and a new cross-reference record is created to enable future Parent-Child connections. Changes are posted directly to the underlying Access 2007 database.
Problem: On return to Master form, impacted Listbox does not refresh even though I've done another tableadapter.fill on the control. I have been unsuccessful over the last week in finding ANY way to refresh the set of queries that supply data to the Master form or the form itself. When I close/reopen the Master form, Listbox includes the new record.
Need: a way to refresh the Master table without closing/reopening.
i am new to vb.net. after insert the data datagrid should automatically refressh itself. how can i do it? for example in C#
[Code]...
I have insert data to MS.Access and re-load data to DataGridView, it's always do at LoadAllData() but some time datagridview is not refresh.
[Code]...
I have a form with gridview data with database data. With query I run INSERT INTO from one table into another, with button. I would like when I run procedure, also reset/update/refresh gridview with new import data??!!
For info, I have try with some methods, such as me. gridview.refresh() or update(), but nothing. Maybe I have also using this methods wrong.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim TEST = New WindowsApplication1.IdisDataSetTableAdapters.Queri esTableAdapter
TEST.InsertQuery()
End Sub
I have a page that add Items to RadioButtonList with this code :
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
RD.Read()
RBQ1.Items.Add(RD.GetString(3))
[code]....
When I click in any button in the same page, the entire page reload and it display 8 items in the RadioButtonList, If I click for the second time I get 12 items in the RBL...How can I prevent the page to reload if I click in this button. ?
I have an app. MDI Parent and several forms,connected to SQL server 2005 via ODBC, and form1 is my app. main form.What I try to do is,
1-when insert data into the database if data already exist then it don't do anything and popup message let you data already in the database.
2- How to prevent end user modify textboxt1 on from1 if there is value in textbox1?
there are two computer connect to one shared database one of the user (user1) will insert new record then the records in (datagridview) of the user (user1) who insert the record will be 11 record but the(datagridview) of other user (user2) will still have 10 record.what the possible way that may allow me to refresh the records..Also how I can make a new record in datagridview of the user2 can be colored by yellow or red back color.
View 2 RepliesI have an issue that I can't seem to tackle. Going on 3 weeks. I have a VB.NET app with an sqlce 3.5 database. I have created several tables in this database. I have attached them to my form using DataSet then BindingSets and so forth. Done this many time before. VS automatically created a TableAdapterManager for me.I was having an issue getting the Refresh of the primary key value of a newly inserted row. Ok, find out that sqlce does not do big transaction, or multiples rows at a time, found Beth Massi's blog on how to work around this:Ok, got it somewhat to work, but I had to take one of the tables out of the tableadaptermanager so I can update it by itself so insted of doing this:
frmMain.Validate()
frmMain.bsRunInformation.EndEdit()
frmMain.TableAdapterManager1.UpdateAll(frmMain.DS1)
[code].....
i'm working on a desktop application in vb.net, using vs 2005 and mssql 2005. i want to refresh the pages everytime i insert a record, but i only succeeded by having a load button where user has to click everytime they add a record to view the new record. Is there any way(s) to auto refresh those pages?
View 3 RepliesI have been struggling with getting FormViews to work the way Microsoft expects me to for about a day and have figure a bunch of great stuff out.
I can catch e.Exception and e.ReturnValue in the ObjectDataSource.Inserting Event Handler and I can even cheat and check other properties of the Object in the ObjectDataSource.ObjectDisposing by checking the e.ObjectInstance ... and I even learned that FormView's Inserting Handler Runs AFTER the ObjectDisposing Handler so If there is a problem found I still have time to react to it and st the e.KeepInInsertMode to true on the FormView.
My problem is, it seems that the values entered by the user into the Insert form are cleared regardless.
So, How do I Prevent a FormView from clearing after it's Insert Method has fired?
(Using ASP.NET + VB)
I don't think posting my code here will really do much good and i would have to modify it to trim out confidential business logic stuff... so I'll skip it for now.
edit:
I have found a temporary and admittedly terribly cludgy solution (in case no one ever finds a REAL solution to the problem).
I have a page variable defined as:
Dim eInsertArgs As FormViewInsertedEventArgs
And then I do the following in my ItemInserted handler
If boolInsertErrorOccurred = False Then
e.KeepInInsertMode = True
eInsertArgs = e
[Code].....
The effect of this is that I am setting the values BACK to the submitted values AFTER ASP.NET binds the FormView to the default (blank) Template.
Lets say i label "label1" , and 2 buttons named "button1" and "btnRefresh " [code]So , when user press the button 1 , the text will change. But what should i put inside btnRefresh to reload the forms ? and display the default label.text = "Form Load" ???
View 9 RepliesI have this data in txt file and the data keeps changing all the time.
[code]...
I would like to read all lines and compare, if the same name and same address is found, which is in the [......], then i need to count it and show the most frequent buyer!should i read it all and put in array, and compare and put the duplicate data and count into another array?