I have searched for an answer for a long time now, both generally ont he web and in several forums including this one. There are many people who asks this or similar qusetions, but the answers are often hard to understand, and quite often are answers to something other than what was asked from the beginning.I know that there are many skilled programmers out there, but most are not great teachers. So here is what I need: I have constructed a program in which the user can write values in textboxes, choose from lists (comboboxes) and make some choices by checking checkboxes. The data in the lists comes from a database, but I don't think that is really relevant here. What I want is, when all the choices are made and when the textboxes, comboboxes and so on have data (text or numbers) in them, I want the user to be able to save this to a file (XML perhaps?).
To speak plainly and visualize this to you, think of a roleplaying game (RPG), and that you fill out a character form with details about your character. Of course you want to save all this, and at some point retrieve it to make changes when you level up. I am not all that stupid when it comes to programming, but I have never tried to do something like this. My applications have had a database engin behind the GUI, and all the saving was done in tables at the far end of everything. Now I want to save data to a file instead. I have tried to find books (or a good tutorial here on the web), but most answers are for C (++. #, etc), or else they are hard to understand.
Is there anyone here who can help me or point me in the right direction? I'm not asking you to do my work for me, but som examples that are valid and that will help me understand the process whould be nice. So far I have recieved good help here on this forum from nice people.
when an exception occures, I want to save the data available on the stack and log it. how can I serialize all the available local variables and save them?
If a class is serialized and has events fired from it that are handled on a form you get the error "Form1 cannot be serialized" in c# you can use (to work around this):
how to save data (for example some text that user type [as password etc]) and save that password on same location where is application. After saving I want to have also Load option so we can load saved data.
Dim js As JavaScriptSerializer = New JavaScriptSerializer() dim jsonString as string jsonString=js.serialize(dt)
when it serialize the data table on the last line,it got an error:
An unhandled exception of type 'System.InvalidOperationException' occurred in System.Web.Extensions.dll Additional information: A circular reference was detected while serializing an object of type 'System.Globalization.CultureInfo'I even make the simplest datatable with only 1 column and 1 row, but it just won't serialize it?
I'm trying to serialize/deserialize data in vb. I've made a .dat file from a blank plain text file (not sure if this is suitable) which seems to connect ok, as do both the classes. Here's the
I've got a web app that sends a request to a WCF service. The WCF service gets a LINQ resultset (anon. ilist) and sends that in reply, back to the web app.In order to get it working quickly, inside the WCF app, i'm using copytodatatable and sending it to my web app in a DataSet.
My web app then takes the DataSet and writes it to xml, some xslt is performed and the resulting data is shown on screen. Perfect.
I'm still (relatively) new to WCF. I understand that sending DataTables/DataSets is a bit cumbersome. The web app wants the data in xml format (for the xslt operation), so I figured I'd get the WCF web service to do the DataTable -> xml work for me, and simply reply with a nice XmlDocument to the client webapp.However a XmlDocument cannot be serialized.
What's the best way of sending the XML data down to the client over wcf?
I am exporting data to excel and try to save to a folder which is in my application...but the excel is saving defaultly in C:Documents but i wanted to save in E:ApllicationReports Here is my code to generate excel sheet
If ComDset.Tables(0).Rows.Count > 0 Then Try With Excel .SheetsInNewWorkbook = 1
I have developed an application on my phone to manage my money. I would like to create an application on my pc to get the local database from my winphone to be able to display informations... and have a backup. I would also like to be able to restore my data back to my winphone if there is a crash.
I'm trying to serialize a data structure and pass it to another report via parameter, and this line of code:
Dim s As New System.Xml.Serialization.XmlSerializer(GetType(System.Collections.HashTable))
Produces this error:
An error occurred during local report processing. The definition of the report '/myReport' is invalid. There is an error on line 22 of custom code: [BC30002] Type 'System.Xml.Serialization.XmlSerializer' is not defined.
How can I get around this? I have been able to use fully defined .NET classes in other lines of code, including the following:
Dim outStream As New System.IO.StringWriter()
and
Private colorMapping As New System.Collections.Hashtable()
I am running an application from my desktop as you see on the picture,and I don't know how to run File Save command on active form without mouse click,only with vb.application?
I work in an engineering design house and programming is not my actual profession. And I am relatively new to VB .net (previous i had worked in vb 6)
I am working on an in house application. I am coding a simple application in vb .net. This applications takes a few inputs from user and calculates a result. Now I want to implement a simple functionality that user should be able to save the input and results just like most of the windows programs can in a new file format. And user should be able to open the save file when desired.
I have a form that has around 4 txtboxes. Data is inserted into these boxes and then a "Save" Button is pressed. I have a GridView added to my form and want to view the entries. The issue I am having is that when I click the save button the data doesn't show up in the DataGridView until I close the application and then re open it.
how to code for the save button in vb.net datagrid view by using insert into sql and update sql statements (it should be able to insert & update the data grid and save the changes) when the save button is clicked .
in my form i have 4 textboxes and i want all not to be empty while saving the data.I have put condition in save button,when user presses the save button to save data, to check all the textboxes not to be empty. My question is that, i want to focus to that particular textbox which is empty during saving the data.
For example: i have txt1,txt2,txt3,txt4 as textboxes in the form if txt1 is empty while saving, the focus should switch to txt1 rather user himself have to go there.
I've written a very simple program that writes a tiny "config.cfg" (text) file to the computer (using StreamWriter), and a second program that is supposed to read that data back.
Unfortunately, it appears you can't save to the same folder as your program under Win7 ("Program Files (x86)" is a restricted folder.) So instead, VB automatically saves my data to the "C:Users(myname)AppDataRoaming..." folder. This is annoying, but tolerable.
PROBLEM IS: How does my second app then FIND my data file (without doing a time-wasting drive search every time the program is run?)
My code:
' Program #1: Private Sub cmdSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSave.Click Dim FileWriter As New StreamWriter("config.cfg")
I have three tables under one database. I'm using the built-in Navigator control for now until I get this figured out, but I'm using a button command instead of the built in navigator button. I need the "Save" button to save the data in the text fill boxes to save to the corisponding table. I used the drag and drop option to drop rows from each table to the form. See code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e
I am trying to call a rest service..that service returns json object...I am able to send the request but unable to serialize the json...here is the code i am trying
This is for a web project so i have several classes that inherit from Web.UI.
I only want to serialize very particular properties (basically, only local properties)
I'm aware of the XMLIgnore property that can be placed on a property to ignore items, but this won't work in my context since that would require modifying a bunch of stuff that i really don't want to modify (and probably can't).
So how do i tell the xml serializer to ignore everything except for X and Y or tell it to seralize just X and Y?
i could just create my own xml in a string builder or something and if that's the only way, so be it. however i'm looking for a method that will employ the built in XML stuff.
I am trying to read in an XML document, add a record with a tag for the filename and write to a different XML document.I have been told I must use serialization.
I have a hash table in which the key is of type Point and the value is of type PieceOfBoard. PieceOfBoard is derived from PictureBox. How do I serialize this hashtable to save it to a file?Do I need to add anything to the PieceOfBoard class?
I'm writing a test application in order to figure out how to serialize a structure to XML. I can not get the following code to work for me and it's not obvious to me.
The following defines the structures I am attempting to serialize. I think I have the xml decoration correct - but the errors I'm receiving (see below) don't really give me much information.
Imports System.IO Imports System.Xml.Serialization Public Module modTestSerialization
