I have following code which is not working and giving Null Reference Exception.
Dim x As New XmlDocument
x.LoadXml("<HostTxnAmt>123C,</HostTxnAmt> ")
x.InnerText = "123"
MessageBox.Show("Done")
I need to simply update text from xml node and save it back into string.
I'm using VB 2010 Express with a local Access DB. I am having trouble determing whether there are changes in a DataGridView to save back to the underlying DB.
The DB has been copied to the project directory and its properties (by selecting it in the Solution Explorer) include Copy to Output Directory: Copy Always, so I know that any changes I make when running a build will disappear on the next build. The problem I'm having is within a run / test session, working with the application.
The Access database has the following connection string, with Application scope:
Provider=Microsoft.Jet.OLEDB.4.0;Data Source="|DataDirectory|Component MI.mdb"
What i am trying to do is save text from a number of text boxes to a user named file then subsequently be able to reload the data back into the same text boxes at a later date.so far i have this which was provided for elsewhere on the web, this allows me to save comma delineated data to a file which is fine but i can't seem to reload the data. As an experiment i have just tried to reload it back into a rich text box to see if the process would work but nothing as yet.
Private Sub SAveToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SAveToolStripMenuItem.Click
Dim savedfile As String
savedfile = TextBoxinc1.Text & "," & TextBoxinc2.Text & ","
[code]....
I have implemented the filestream feature of SQL Server 2008 in a VB.Net application. I can insert files, and then retrieve/view them just fine. However, I have huge problems trying to update a file. Eg. The user selects a file from the grid which I execute via process.start. If that file is a .txt file, the user may choose to edit it. In case that happens, I need to save the changed file back to the database. So far I have failed to do that.
What I do, is take the retrieved file, copy it (cause i got some errors about it being used), and then Process.Start it. After that, via .NET filestream, I convert the file to bytes and try to update the record. SQL Profiler and a manual SELECT on the varbinary(max) column tell me that the file is updated properly, but the very next try to retrieve it I get an unchanged file.
After that I also tried to update the file by changing its File-System Version, but the file still wouldn't seem to update. Does Anyone have a code sample of how I can achieve this operation? Like 500 sites on the internet have examples of how to Insert And Retrieve the file, but not a single example on how to update. This is how my second attempt of trying to update the file via the filesystem looks like. The code for inserting/retrieving is very similar and it works properly. [Code]
I am trying to get the webpage back as a string a used this in it own function. It comes back ip followed by <!--ipaddres (ipagine) --> I had the code done but my computer crashed and lost it all. If you get it as a string you can count the extra letters and and sub the extra ones then divided by 2 to get the half that will be the ip something like this:
*gethttp is the other function
function realIP as string
dim a as string
dim out as string
dim i as integer
[Code] .....
I would like to read an HTML file, search each line to see if it starts with </head>. Then add the centering code after it. That line at destination file should read:
</head><table border="0" cellpadding="0" cellspacing="2" width="760"align="center"><tr><td>
After this I don't care to search for anything. Just read from source and write to destination. I know there are programs out there to find/replace text in series of files but I am not allowed to use external programs.
These is the content of my txt file which is saved in D drive in my pc abc,1,2,3..I tried the flowing but it didn't work:[code]I am getting error on this line.. data = line.Split(","c)...it says this line isn't in use anymore or something and that I rather use LineInput but thats asks for filenumber and i don't know what that is. I am sorry but I am a complete beginner. what else can I try? [code]ok that error is gone now but now if I want to add these values to a list box..how can i do that?
View 1 RepliesI have thios code that will load a php file (text file) into a sting via streamreader then its supposed to find and replace a portion of the text and write the changes back out to the file via streamwriter. I put my code together and after running it look at the file and it's unchanged. After looking closer it appears the problem is the find & replace operation I am doing on the string. Here is my code:
[Code]...
# TAG NAME = is saved to a file using the code below but when I load that same file back into a RichTextbox Control using additional code below, I get inconsistent results as I try to parse the text. Has anyone else had this problem?'Save the contents of the RichTextBox into the file.richTextBox.SaveFile(saveFile1.FileName, RichTextBoxStreamType.RichText);'Retrieve contents of File into RichTextBox control Dim logData As String
logData = System.IO.File.ReadAllText(path + "\" + filenname);
I want to check for a node in a XML document and if it is not present I should insert some dummy values .I am not able to select/search the node. Below is the sample xml where I need to check if dummy1 and dummy 2 both have node1 and node2 :-
[Code]...
I'm looking for a way to update a certain part of xml node. I would like to be able to change only the date part ('2009-02-01') in the SELECT command in the following xml[code]...
View 4 Repliesi'm trying to refresh a few form checkboxes based on text typed into machinetxt.text with what is currently stored in the database. i put this into the refresh button click event. here is my code:
Private Sub machinerefreshbutton_click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles machinerefreshbutton.Click
Dim mycon As SqlCeConnection
[Code].....
i've tried tweaking the select statement but it still gives the error that the machinetxt.text string is not found in the database. Even though i type it in exactly as shown in the database.
is there way to update having quote string eg. drug's name ('s) in vb text field ' this corrector REFUSING TO UPDATE TO DATABASE. this kinds of error always comes up Incorect Syntax Near 'S'.Unclosed Quotation Mark After character string '))'.
View 3 RepliesHow can i make a program that will read a text file (.txt) and save each seperate line as a variable? [cde]...
View 5 RepliesI've created a private sub called addIRCRoom Which makes the Tab and the TextBox, but i can't figure out how to update the text in the TextBox.I've made this function to handle it:
Private Sub displayOut(ByVal Channel As Object, Optional ByVal User As String = "", _
Optional ByVal Message As String = "")
Channel.Text = "<" & User & "> " & Message & vbCrLf
End Sub
But i just get this error all the time: "Public member 'Text' on type 'String' not found."how to update the text
I am creating a dice game that you try and obtain a straight with.This is my equation for the random roll.
Private Function CreateRnd() As Integer
Randomize()
CreateRnd = CInt(Int(Rnd(1) * 6) + 1)
End Function
This is what I am trying to do
Private Sub RollBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RollBtn.Click
'checkboxes
Dice1.Enabled = True
Dice2.Enabled = True
[code]....
I have a rich text box in my form, and formatting will be applied to the text.
I need it to save the text with its formatting as a string (to be entered into a database)
My problem is, my current code only takes the text unformatted, so when the form reloads, the text is plain
My app builds a string based on user input. Once the string is complete and ready for output I'd like the user to be able to save that to a text file on the HDD, preferrably to My Documents.
View 1 RepliesI need to save an XML file with close to 10k child nodes and i need to know which approach is best for it.[code]This is a web application so the choice is very important.
View 5 RepliesI have a treeview which has 3 noderoots and each noderoot have many child nodes.
In my program , the child node can change forecolor itself.
I want when formclose, i can save each changed forecolor node to application setting.
i tried to use properties binding : forecolor , linecolor.
i want to save String in File Who not Able to open in Text Editor Open it Only on my Application Suposly i want to save Phone Book Contact In this file
Three Text Boxes
1. Name
2. Phon Number
3. @mail Address
i already read these stuff but still not Understand i already check Kaymaf Provided link , but i m not understand Create Your Own Custom File Type
How do I read all the text from a text file and save it as a string variable? For some reason I remembered it being something like this: IO.FromFile.ReadAllText("path") but thats not it.
View 3 Replieshow 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 .
View 2 RepliesIts a League Organizer, basicly ive started it off with 16 teams and end up with 1(winner) 16 box's on the far left, then 8, then 4, then 2, then 1. the 16 box's have "Team 1" "Team 2" etc... ive put a new/clear/open/save button in that order.
BUT this is my problem..when i save(Save Button) the text file saves all the text wrong it ends up like this...Team 1Team 2Team 3Team 4 Etc...
But i want it to save like this
Team 1
Team 2
Team 3
Team 4
Etc...
The code is...
Dim Save As New SaveFileDialog
Save.Filter = "Text Files (*.txt)|*.txt|ALL FILES (*.*)|*.*"
[CODE]...
private
void bindingNavigatorDeleteItem_Click(object
sender, EventArgs e)
{
[Code]....
code does not make chages to database when i reopen the application the records exists as earlier.
VB.NET i have only one colum in back end database that is roll. .. Now i want to update a particular data .. the data types is integer.. i has a data like 12 and i ant to update it 13 how can i do..
[Code]...
Not entirely sure where I've gone wrong with this, basically the problem is I have an access database linked and currently I can create new entries successfully but when I edit a record and the user attempts to save back to the database it throws up the below error.[code]...
View 4 RepliesI have a DataGridView bound to a data table. I have one column where I permit updates. After I fill the table (at form load), I make an update to this column Then I attempt to update the change back to the bound table. I get the error 'Update requires a valid Updatecommand when passed dataRow collection with modified rows'. I have seen some examples on-line to define, load, and update but since I have the generated datagridview with bindings, shouldn't the update method me a simple 1-liner? [Code]
View 2 RepliesI am connecting to a web service that returns a dataset that I use as a datasource for a windows client datagridview.
Once a user has made changes to the datagridview record(s), how do I get those changes back to the connected dataset and back to the remote database.
I wrote the sql update function in the service:
Code Snippet from web service
<WebMethod()> _
Public Sub Update_equipment_repair(ByVal repair_id As Int64, ByVal date_entered As DateTime, ByVal date_sent_in As DateTime, ByVal date_returned As DateTime, ByVal damage_description As String, ByVal vendor_id As Int64, ByVal repair_description As String)
[Code]....
This displays the records perfectly and I figured out how to delete and insert records via web service.
writing updates from the datagridview back to the database.
I am writing a small windows client application that accesses data using a web service that returns datasets.When the dataset is returned, a datagridview's datasource is set to the dataset.
My question is, how do I write changes that were made in the datagridview back to the dataset and then back to the remote database.
[Code]...
Now the client snippet that connects to the service and lists the equipment