I have a control that has multiple tableadapters used to show various information.My delima is that I dont want to update all of them if the data for them was never modifed.Is it possible to check all bindingsources to see if they have any changes and force the ones that have modifed rows to update?
View 15 Replieswant to update values in an xml file. When users select the xml file, the form binds controls to a dataset. After updating some/all values, the changes are saved. It works for every field except for a calculated value.
View 2 RepliesI have a datagridview with contacts on a form with clients. The underlying table for contacts has a field for Contactnumber. This is a identity column so its new number is generated by SQL Server.
I add a row and when I move to the next record on the form, the form �nd the information in the datagrid is saved to the database. So far, so good. The problem is: when I move back and try to delete that newly made row I get an error about concurrency.
It's logical actually, the record is saved, but the dataset of the datagrid doesn't yet know what the new contactnumber is. Apparently it's not information that it gets back automatically from SQL Server.
How can I make the dataset know the new identity of the row that is saved to the database? I use a simple da.Update(dsVerwijderingen, Tabelnaam) to save the changes to the database.
is my code in VS 2008 (VB) to show Crystal Report. but crystal show saved data not my dataset:[code]
View 4 RepliesI am creating a simple button based rpg and was wondering if someone could help me with 3 things how to hold information within the game until the player save's the game, Saving the game, and Loading the game.I want the saved games to be saved onto a encryted file like .db or .dat file..
View 3 RepliesWhen the user clicks an "Edit" button on my form, I want a box to come up which allows the user to edit a DataTable in a strongly-typed DataSet. What's the best way to do this?
View 2 RepliesI have code running in the Datatable.ColumnChanging event in my dataset. This dataset underlies a form and conventional drag/drop controls are in place for data entry.when the event triggers and runs, I am running code in the form that checks the dataset.HasChanges property. It is showing False. But this is immediately after the ColumnChanging event has been triggered.Okay, I see by others posts and MSDN that .HasChanges will only be true after moving off the row with the changed column. I have also noted lots of discussion about the advanced binding property of DataSourceUpdate Mode, but that does not address this issue.I guess I can do this by checking the state of the row for the binding source. Just seems odd that the event behind the dataset can be triggered and that does not change the dataset.HasChanges property.
View 3 RepliesI have tried everything I can to get beyond this error which shows below as <<<<< error here. It is trying to fill a dataset from a data adapter. If I change the SELECT statement to just SELECT * FROM xTable I get the correct number of records in each table. But anytime I try with a more complex statement I get the error message shown below which indicates System.Data.Common.DbDataAdapter.Fill(DataSet dataSet. I've completely erased all data and entered a new set of test data so I know there is no problem with relationships. Each table has primary key which is foreign key in other table. IS there something wrong with the Imports section: Imports System
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i am trying to copy data from a standard Dataset to a Type Dataset (XSD) of same table structure. i want to use Automapper to do that one. So how can i do that using automapper?
View 1 RepliesI need to pick all data in my application from my database and use it in my form
my question : how to pick all data in my application then i use it
I have two Datagrids, One grid has all the customers garments on it with style number and contact length. The other grid has the users who have garment issued to them. the style number is in both grids. I need to loop through the users grid and say if the contract number is 1 from the first grid then the contract date on the second grid will be todays date + 365 days (year contract) I have looked at using a stored procedure and also a for each command but I am just getting stuck with it all. [Code]
View 1 RepliesI have a problem saving a dataset which contains rows that i have imported from another dataset. i can successfully view the imported rows in a gridview but i cannot commit the rows back to the database.
View 2 RepliesI have multiple datasets that I would like to combine into one. There is a common ID field that can be associated to each row. Calling Merge on the dataset will add additional rows to the dataset, but I would like to combine the additional columns. There are too many fields to do this in one query and therefore would make it unmanageable. Each individual query would be able to handle ordering to ensure the data is placed in the correct row.
For Example lets say I have two queries resulting in two datasets:
SELECT ID, colA, colB
SELECT colC, colD
The resulting dataset would look like
ID colA colB colC colD
1 a b c d
2 e f g h
ok, I've finally got my test database issues sorted out, however now I need to actually modify my existing report to add the two new fields from my test database. I have made a copy of the report so that I am not modifying the original. I have deleted the two old fields and now want to add my two new fields in there. In the Field explorer window, I see an object called "dataset1" and when I expand it, it is using a view that includes fields from the table that I added my two new fields to.
The problem I see here is that I have gone in and modified the view to include these two new fields in my test database - but again, they are not showing up as selectable fields here. I am just assuming that "dataset1" is somehow pointing to the live database again and that I need to change the datasource location.In my solution explorer, I see an object called "dataset1.xsd" but the properties of that do not tell me much about where it is actually pointing to...
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I want to access data using both the datasets.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Try
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In my code i have dataset name ds and table named Info1,when i write ds after that how tablename is coming,its not possible? How to do that ?
I have been searching the Forums for a solution to my problem, but I can't find anything that relates to my specific situation. All of the postings regarding not being able to save changes to a database have had to do with a datagridview. On forms that I do have a datagridview, my changes are saved.But I have a form with textboxes, comboboxes, and pictureboxes bound to a bindingsource,
Private Sub Back_Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Back_Button.Click
Try
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I have a module that has a load of properties in them but whenever I try to add data to the variables it doesn't save. Any reason why?
Public Class clsFormSettings
Public _colour As Color
Public _font As Font
Public _fontColour As Color
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I tried to set another form the background colour red and the variables are empty when I step through it.
i am looking to map a dataset of addresses on a map. basically, i want the users to type a street name in my town and be able to see the houses that have signed up already on that street. so a pinpoint should show up on the houses that came up on the dataset.
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I have some concern about designing Datasets. I was told that it would be good to have a dataset for each table for maintenance purpose. Because frequent change in database tables is expected, having one dataset including every tables would be pain to make the corresponding change in the application.
Q. is it good approach to have a dataset for each table ( I would end up having 30~40 datasets for each db table using Stored procedure) ?
I have a separate project for commonly used datasets. each project include "dataset project" as a reference, and use it by including needed dataset into Forms, classes, etc.
Q. Does this approach makes the whole system to be slower? If I have a set of datasets as a separate project, it would be beneficial, since It will be easier to make a change (I only need to make modification in one place)
it returns date, and value by date.
for ex:
01.01.2009 454
02.01.2009 785
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I am having difficulties with Filling a dataset. It seems to be automatically assigning a datatype to the column based off of the first field of data it finds in that column. The column sometimes contains an integer, but it may also contain letters and numbers. If the first field is an integer, it says the fields in the column that contain a letter are DBNull. I'd like for the entire dataset to be formatted as a string/text type since I do not know what the values will be that I'm importing 100% of the time. How do I tell the dataset to expect a certain datatype for all columns and rows i'm going to import?
View 19 RepliesWhat is the impact of creating variables using:
Dim ds as New DataSet
ds = GetActualData()
where GetActualData() also creates a New DataSet and returns it? Does the original empty DataSet that was 'New'ed just get left in the Heap?
What if this kind of code was in many places? Would that affect the ASP.NET process and cause it to recycle sooner?
I have a datagrid which is already bound to a dataset, I need to get this dataset,make changes on some data, then rebind the datagrid with the modified dataset.
here's my code
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I have a form that has 1 text box and has 2 queries that locate the data. One is by customer ID and the other is by customer last name. They both work but when the code works and the user enters a customer ID and the query locates it then enters a customer last name it also locates it. If the user enters the same customer id again the query seems to fail. This is why I'm sure I need to add some kind of code to reset the Dataset.
Here's the code in the load sub procedure:
EditBoxSearch.Focus()
' Start out clean.
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how to add items in combobox1 that will be saved....this pattern isn't do the way i want...Form2.ComboBox1.Items.Add("test") because after i close the form2 it would be back to nothing...is there a code that will do this? because it works only in design view...in items then collection..
View 4 RepliesAfter I finish messing around with my projects I open up VB 2008 and try to open them up again and there is so much stuff in the folders I press everything and none of it works?
EDIT: I can debug the program but can not find where to edit the coding and layout?
I have a very large Access database and the code which try to edit a record is below
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I am trying to copy a file from one location to other by clicking on a link label.the original file is saved at "D:\New Folder\" and the complete address of the file is stored on the link label.whenever i click on the click label, a form appears with three button Open, Save as, and cancel file is opening normally but when i click on save as , save as dialog box appears normally, but after entering the file name when i click on save button, file is saved on the destination but without any extension.
Here is the code...
ext1 = System.IO.Path.GetExtension(LinkLabel3.Text)
saveFile1.DefaultExt = ext1
saveFile1.Filter = ext1 + "All Files|"
If (saveFile1.ShowDialog() = System.Windows.Forms.DialogResult.OK) And (saveFile1.FileName.Length) > 0 Then
System.IO.File.Copy(Form3.LinkLabel1.Text, saveFile1.FileName.ToString)
End If
How do i save information thats stored in the clipboard to a varible?
View 3 RepliesUsers can configure settings in my program, and those settings need to be saved for the next time the program is used, How can I implement this?
View 5 Replies