Getting "final" Prepared Statement From MySqlCommand?
Aug 30, 2009
I have the following MySqlCommand:
Dim cmd As New MySqlCommand
cmd.CommandText = "REPLACE INTO `customer` VALUES( ?customerID, ?firstName, ?lastName)"
With cmd.Parameters
[code].....
I have a class that handles execution of MySqlCommands and I'd like to have it log every query to a file. I can retrieve the query/command being executed with:
cmd.CommandText
but that just returns the original CommandText with the parameters (?customerID, ?firstName, etc.) and not the actual substituted values added by the AddWithValue functions. How can I find out the actual "final" query that was executed?
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Nov 2, 2009
I'm developing a tiny program to update a single field in an MSSQL database table as needed.The user enters in an ID number, clicks Find Patient, and the TableAdapter output gets filtered into a DataGridView.Out of the entire table, I'm only displaying 3 columns (two locked for editing), and hiding the key column. When I go through the TableAdapter Configuration Wizard and have it build the Update queries, it complains: "Updating queries cannot be automatically generated because your SELECT query does not include some primary key columns. Do you wish to add primary key columns to your query?"
[Code]...
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Jul 11, 2011
I'm having a problem with Dim query As New MySqlCommand("Select count(*)....") I would like to take the variable query and do an If query <> 1 Then statement on it. Is this possible or is there a completely other way to go about this comparing the contents of a MySQL select statement. I'm rather new to Visual Basic.
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Sep 8, 2011
I cant really find any good sources for connecting to a database via connection string and executing prepared statements. Could someone show me an example or point me to a resource that might be useful?
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Jan 8, 2010
I just want to know how to create a prepared statement in VB. I know in java one would use ? and these would get replaced. I am aware that in VB you use @ParameterName. Basically my code gets down to where i use the prepare method and the error i get is that my syntax for my insert is incorrect. To me it seems that the parameter is not getting substituted in the insert statement
Eg.
Dim cmd As String = "insert into sites(id) values(@id)"
Dim odcmd As New OdbcCommand
odcmd.CommandText = cmd[code].......
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Aug 22, 2011
I'm trying to execute a MySQLCommand like so[code]...
It seems to be something to do with the "size" parameter, but I don't see what is wrong with it.
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Feb 26, 2012
I want to make a query like this.[url]...
When I test it on my mysql query browser, it works well.
Now, I want to execute it in VB with mysqlCommand. of course @rownum is defined as a parameter and waiting for its value. How can I execute that query in VB?
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May 29, 2011
I need to import data from Excel into a MySQL 5 database. The format of the column in excel is set to "Time". the field value looks something like this:
17:20:00 If I do this in my vb.net
strTimeIn1 = Trim(jobdt.Rows(j).Item(7).ToString)
I get this in my Immediate window when debugging:
"12/30/1899 4:10:00 PM"
what's the correct way to convert that string to a time value so I can insert into a datetime field in my database with no issues.
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May 12, 2012
I create a dictionary in a function which I pass to the function executing the sproc.
Dim PParamDict As New Dictionary(Of String, String)
PParamDict.Add("sname", name)
PParamDict.Add("sdescription", description)
PParamDict.Add("sLoggedInID", LoggedInID)
PParamDict.Add("sCompanyID", CompanyID)
The dictionary gets passed to the function PParamDict -> ParameterDict
Dim dbComm As New MySqlCommand(ProcedureName, PConnection)
Dim pair As KeyValuePair(Of String, String)
For Each pair In ParameterDict
dbComm.Parameters.AddWithValue(pair.Key, pair.Value)
[Code] .....
This works as long as the PParamDict.Add statements are in that order. If they're in a different order they get passed as they come in. This is the most ridiculous thing I've ever seen, I'm passing the keys to the MySqlCommand which are defined letter for letter in the sproc.
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Jun 1, 2009
I am using the following
Dim cmC As New MySqlCommand()
Dim daC As New MySqlDataAdapter()
Private Sub btnClientSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClientSave.Click
[code].....
When I add 1 client it works fine, but when I try adding another I get the following error:
When MySqlCommandBuilder.ReturnGeneratedIdentifiers is true, MySqlCommand.UpdatedRowSource must be set to None.
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Dec 18, 2011
Does anyone know how to implement in VB an algorithm for final differences that changes the network (the matrix) during the computation (decrease its dimensions)?
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May 5, 2011
The program I am making contains many Form ,and I see that adding Forms increase the size of the final .exe . Is there any way to avoid making the large .exe ,as I have came to know that Large .exe is not good and also consume more RAM memory.
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Aug 4, 2009
I've looked up this answer and changed 'build' option to embed the files but I still get a io file not found error. where exactly are my resources located? atm my code is this:
Private Sub TextBox1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
Select Case e.KeyCode
[Code].....
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Nov 19, 2010
this application for computing the gcd but it give me just the value for first iteration but i need the final values of x2 y2 a
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim x1 As Integer
Dim x2 As Integer
Dim y1 As Integer
Dim y2 As Integer
[Code]...
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Nov 20, 2010
phi(n) to any number in this code give me one?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim n As Integer
n = CStr(TextBox1.Text)
[code]....
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Nov 5, 2010
Dim Test_Output As System.Byte = 0
Try
For test_value As System.Byte = 0 To 255
Test_Output = test_value
Next test_value
Catch ex As Exception
MsgBox("Exception occurred: " & vbNewLine & "Test_Output is: " & Test_Output.ToString & vbNewLine & ex.Message)
End Try
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Sep 6, 2010
I have a BaseClass, a DerivedClass1 and a DerivedClass2 from a third party library. DerivedClass1 and DerivedClass2 both inherit from BaseClass.There's a ContainerClass, from the same library, with a member variable ActiveItem, which can be of DerivedClass1 or DerivedClass2, so it is declared as BaseClass.I want to know if ActiveItem is of DerivedClass1, as it can change in runtime without notice.If I do
Dim isDerivedClass1 as boolean = TypeOf(oject.ActiveItem) Is DerivedClass1
then I get a compile time error, telling me that ActiveItem can never be of DerivedClass1 type.I have tried several combinations of GetType and TypeOf but it doesn't seem possible to check this. I have also tried to declare an auxiliary DerivedClass1 variable and comparing their types, but haven't got any luck either.
Edit:The following code doesn't compile in vs2005 SP1.
Public Class Base
Public x As Integer
End Class
Public Class Derived1
[code]....
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Mar 1, 2012
Is there a way to delete the final line of a DataTable? I use - DataTable.Rows.Remove()But how can I find out which is the final line in the DataTable
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Feb 25, 2011
I need to build a comma-delimited string from an array.
For i=0 to ubound(arr)
str+= arr(i) & ","
Next i
The trouble is that I end up with an extra comma at the end.
My current method for removing the comma is:
If str<>"" then
Left(str, Len(str) - 1)
End if
But it seems pretty untidy, and non-generic. I have to do this so often, it's become a pain.
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Apr 24, 2012
I have a system that has a gridview on one page with an Update Panel. On selection of one row of a gridview the system posts-back using that CommandName and CommandArgument to post the row that is selected, and then set a Session variable as the ID of that posted selected row. The other controls run Async correctly and the button in question is already registered using this on the RowDataBound event.
Dim gvRowSelect As GridViewRow = e.Row
Dim imbSelect As ImageButton = DirectCast(gvRowSelect.FindControl("imbSelect"), ImageButton)
ScriptManager.GetCurrent(Page).RegisterPostBackControl(imbSelect)
I would like to try and get this session on the button command and somehow within the master page, set a label to the current Session. On the imbSelect command the code is:
Dim cellSnapshot As TableCell = gvSnapshots.Rows(e.CommandArgument).Cells(0)
Session("Snapshot") = cellSnapshot.Text
Within the masterpage is there anyway of calling a function after the Page_Load, and after it has resolved all Postback events?
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Dec 4, 2009
I am having trouble trying to get my shared class final value
Class name : Encryption
Public Shared Sub PassEn(ByVal PassTxt As String)
Dim strText As String = PassTxt
Dim salt As String = "61651616516161651615"
Dim bytHashedData As Byte()
[Code] .....
I am trying to call this from the call and get the return hash but when I try to make a global variable it doesn't allow it. How would I call this and get "HashValue" on to a textbox on my form.
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Sep 2, 2009
Over the last few weeks i have been trying to add a final level of nodes to my treeview from databases.Within each database is the title of the next node and the key of the node, the child nodes are linked to the parent nodes by the row number/ID column.That is my scenario.
Now comes the next "challenge" At the moment in my code i have had to take out the parts that cycle through each database to add the children as it was causing an error that is described (Learn how to insert hyperlink) here: [URL].. So to overcome that i removed it (dumb approach i know) My justification is that i wanted to see if "my" code worked to add all levels of the nodes. But instead of having All the nodes that should be visible, i only have all the last ones: heres a 'picture to show'What i have below; Whereas all the parents should have children, all the children grandchildren and the grandchildren greatgrandchildren.
[Code]...
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Mar 16, 2011
I have the following query:
Dim roommates = From p In dbroom.Residents _
Where p.room = queryStudent.First.r.id _
Where p.building = queryStudent.First.b.id _[co
de].....
But I still get the same error: The method 'First' can only be used as a final query operation. Consider using the method 'FirstOrDefault' in this instance instead.
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Dec 22, 2010
How do I get final output to display month, day, year? Would I need another replace array? Or can I dynamically format from SQL table?[code]...
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May 1, 2010
I'm running three subs in turn (one for each stage of the process that I'm carrying out).The first two of them run a VB Process using:
myProcess.StartInfo.RedirectStandardOutput =
True
[code]....
They then use the StandardOutput of their process to update one TextBox that I'm using for the output of all three stages.The final sub uses the shell because I can't get the EXE that I'm running with it to work properly using a process (this is not necessarily the problem though).The problem is that nothing changes in my textBox until the final sub has finished. The first two sub's output doesn't appear even though this should be just a linear process...
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Jul 18, 2009
I'm trying to put a scroll in the final message box that populates when you run the program but I can't seem to get around it.
Option Explicit On
#Region "Description"
#End Region
Public Class Week3
[code]....
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Mar 23, 2010
I am currently writing a code that prompts a user if they want to convert F to C or C to F, two functions with the calculations. My problem is my loop, it exits one time through and doesn't prompt again. And also doesn't display the final result.
' VB Script Document
option explicit
const menuBar = "Temperature Conversion"
Dim userPrompt, prompt, Temperature, toCelcius, toFahrenheit
prompt = vbOk
Do While prompt <> ""
[Code] .....
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May 3, 2009
I'm taking my first (and only) beginning programing class for Visual Basics 2008. I'm working on my final project and have hit a snag. A little background info - I have been able to code everything except for two final steps (but they are my most difficult steps), on these final steps I've gotten two suggestions on other sites, one person helped me with the coding which I used for my form1, but it I still have several errors, and another person suggested that I use a module.
Here is the issue. I have totals on three forms that need to pass through to a final form, and once they are on the final form they need to show up in an itemized list and need to then be totaled again. I actually have a total of 5 forms including my first form aptly named form1, which incidentally is where someone told me I should set up my whole 'connecting the totals' form, and I believe the guy was on the right path with helping me but, I'm still obviously pretty lost on this last segment of coding. Since I had little difficulty with the majority of my project, I didn't think this last bit would be so difficult. I'm going to list my coding for each form below. My project is due Tue morning May 5th Eastern Standard Time, just in case someone starts reading this on or after that date. Just in case it helps explain the issue, I will also post my listing of error codes from my VB project, and they all are centered around my form1 (which is the form that I'm trying to set up the transfer through of the form totals). I also see that I can post attachments so in case it will help I'm going to post my project in the attachment too.
Error Codes:
Error1Event 'Load' cannot be found.
Error2Handles clause requires a WithEvents variable defined in the containing type or one of its base types.
[Code].....
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Aug 9, 2011
THis code extract a value from a table to a var...
Dim var_IES_fornecedores as double = 0
For Each dRow In ds.Tables("Tabelavalor").Rows
If dRow("numeroconta").Equals("221") Then
[CODE]...
This is the problem...the numbers after the period should be just 2 and not a lot of numbers...everythin wrong with the code?
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Nov 20, 2010
this application for computing the gcd by using extended euclidean but it give me just the value for first iteration but i need the final values of x2 y2 a
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim x1 As Integer
Dim x2 As Integer
Dim y1 As Integer
[code]....
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