SQLCommand Not Clearing Text In Loop

Mar 3, 2010

In a for each loop I am adding rows to a table for a cross reference. Using the following code:

For Each cp In pCheckPoints
If cp <> String.Empty Then
Dim insertSQL As New StringBuilder
With insertSQL
.Append("INSERT INTO [CheckpointMessage] ( ")

Without the objCommand.CommandText = String.Empty line the CommandText is appending the insertSQL but that doesn't make any sense to me because I would expect the objCommand's commandText to be empty since it is in a using block.

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VS 2010 - Loop Through And Clearing CheckBoxes

Mar 18, 2011

I'm doing an assignment for Uni and in my VB.NET form I have some checkboxes, I'm trying to loop through and clear them (I have a button which will clear the form). My problem is that there seems to be no property I can use to set the state of a checkbox when not explicitly telling VB which checkbox I want to use. for example, I can go
WineCheckBox.Checked = False

That will check the box, but I wand to DRY the code up a bit and not have to repeat this for each check box I have, this is what I was trying to do:
If TypeOf element Is CheckBox Then
element.Checked = False
End If
I've tried using element.CheckState and element.Checked and both times I get "Checked (or CheckState) is not a member of System.Windows.Forms.Control".

This is the whole block of code:
'clear the controls
For Each element As Control In Me.Controls
If TypeOf element Is TextBox Then
[Code] .....

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Trying To Update Record Via SqlCommand With .Text Value

Jun 16, 2010

I'm trying to update a record by using the following code but it's not updating it, the value stays the original database value.[code]

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Once Again With Clearing Just The Text Boxes?

Apr 19, 2011

Option Explicit On
Option Strict On
Public Class formFat

[Code]....

i have discovered a way to clear just errors in text boxes involving =>0 using if statements. if i could use the same and state if <> numeric then etc.

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Clearing Multiple Text Fields

Aug 2, 2010

I tried searching for a solution, but couldn't find anything, so if I am re-asking a common question, don't beat me too badly. For a class, I have to create a form that allows someone to enter in the names of six students, as well as five test scores each. It also averages the scores, and displays them in a label.

What I am wondering is if there is a way to clear the text from all 36 text fields, as well as the 6 labels without having to do everything individually?
I could certainly go through, and write out txtField1.text = String.Empty 36 times, but it seems there would be a more elegant solution. Also, if there is a way to do so, would the same would apply for putting the data entered into an array, or saving it to a file?

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Clearing Text Of Cell In DataGridView

Jun 18, 2012

I am new in VB2008. How I can programmtically delete/remove/clear the content of a cell of DataGridView? Say, for example, I have the following code that populates with data in DataGridView. Now,how can I clear/delete the "Test4" text from the cell of DataGridView? The GridView is not bound to any database.

Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim dt As New DataTable
dt.Columns.Add("income")
[Code] .....

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Clearing The Text In A Dropdownlist Combo Box?

Aug 26, 2010

I have a combo box that is set to dropdownlist. After a user enters and saves the data, the data for all non-dropdownlist fields auto clears. How do I clear the data for this type of field? I have tried combobox.text = "" but that does not work. There are no data bound items with this combo box.

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Clearing Needless Text From IRC Server Input

Feb 21, 2011

I'm making a simple IRC client for myself because I really don't see the need for a lot of mIRC's functionality, but I'm having problems cleaning up the input from the server.

Right now, on connect, I'm getting the following:
[16:37] :young.home.net NOTICE AUTH :** Looking up your hostname...
:young.home.net NOTICE AUTH :** Found your hostname
PING :DE7AED31
[16:37] :DE7AED31!nospoof@young.home.net PRIVMSG Logan :VERSION
:young.home.net 451 PING :You have not registered .....

I've read the IRCP (RFC 1459) and I understand the formatting of the server input, but I can't seem to strip out the unwanted stuff... A friend suggested loading the input into an array and deal with each item individually, but I can't seem to make it work. I have tried, but it doesn't seem to make a difference...

Here's my code
Public Function recv() As String
Dim mail As String
Try
Dim Data(4096) As Byte
sock.Receive(Data, 4096, Net.Sockets.SocketFlags.None)
[Code] .....

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Clearing Text Fields On Project Vs2008

Apr 28, 2010

web page has a few fields to allow the user to enter payments. After the system processes the payments, the fields weren't cleared out.so my task is to simply clear them out.[code]The procedure is writing an HTML receipt into the strBody and displaying it to the user.They see the 'File download, do you want to open or save this file' and can open the receipt in ms-word. Without those three lines, the resetting works. So clearly they are messing up something, I just don't understand what.I've got a workaround, but I'd like to know what is going on.Even to the tune of is this a correct way of creating/downloading a document.This in an inherited system, the original designer is long gone.

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Clearing Text From A Cell Based On A Condition?

Feb 17, 2011

write a macro that removes the letters "TBD" from any cell it is in in a range of cells (J5:PJ421)n a different worksheet. This is probably very simple, but I am new to VBA and can't figure it out.

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Problem : While Clearing Drop Down List Box Displaying Text

Sep 5, 2011

When an item is selected from the list it displays in the text field of the combo box and I want to clear it without clearing the items in the list. I've tried [dropdown list_name].text = ""[Eg:- CBSelect.Text = ""] but it doesn't work since the text entering field in a drop down list box is read only.How should I do that. By the way, I'm coding in VB.NET 2005 so please give answers in VB.NET 2005.And my selection is from combobox its clear. same combobox property ( DropDown style = DropDown List ) text is not clear.

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Run 2 SqlCommand Together?

Jan 17, 2012

[code]...

Is this possible to run 2 SqlCommand together??

Because after executed somehow the 2nd inside the loop did not execute or insert data.

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C# - Convert SqlCommand To T-SQL Command

Oct 15, 2010

I have an SqlCommand with parameters. Due to some external requirement (see PS), I need one T-SQL string instead, i.e., I need ... @parameter ... replaced by ... the-value-of-@parameter-encoded-correctly ... (e.g. O'Brien --> 'O''Brien', 02 Mar 2010 --> '20100302', 3.5 --> 3.5).

I know that I could home-brew such a solution quite easily, but correct escaping is tricky (make sure you get the right date and number formats, watch for quote signs in strings, etc.), and I guess that I'm not the only one needing this, so my question is:

[Code]...

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Sql :: Get SqlCommand ExecuteNonQuery Result?

Aug 29, 2011

In order to check if specific user is db_owner, i excute the following query:

"select is_rolemember('db_owner', '" & p_userName & "')"

using the SqlCommand ExecuteNonQuery method.How do I get the query result?

Here is my code:
Dim com As SqlCommand = New SqlCommand(sql, m_connection)
com.ExecuteNonQuery()

[code].....

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Sqlcommand Parameters Not Executing?

Aug 13, 2010

I am encountering a strange problem when attempting to execute a DELETE query agains a SQL Server table using VB.NET, SQL Command, and Parameters.

I have the following code:

Try
sqlCommand.Transaction = transaction1
sqlCommand.Connection = conn

[Code]....

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Supply SqlCommand Parameter Value?

Aug 8, 2009

Below is an UpDate Statement I am practising with David Sceppa's book ADO .NET 2.0 Core Reference pages 467 - 468. I can supply the parameter values for "parameter_New" by doing something like:

da.UpDateCommand.Parameters("@OrderID_New").Value = myTextBox.Text

And so on...My problem is how to supply the value of "paramete_Old" to be able to compare before update. I gues it has to do with obtaining the Original values of the rows based on RowVersion but I don't know how to effect it.

strSQL = "UPDATE [Order Details] " & _
"SET OrderID = @OrderID_New, ProductID = @ProductID_New, " & _
"Quantity = @Quantity_New, UnitPrice = @UnitPrice_New " & _

[code]....

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Using SqlClient.SqlCommand, SqlParameter, Etc?

May 19, 2010

I am experiementing with table updates and the code below gives me the following error message: "The variable named "@Processed" has already been declared... at the following code line: clsWTAdapter.Update("clsWTDataTable"). I fear that all of my code is a general mess, and I am sure there is a much better way to go about it.

Dim clsCmd As New SqlClient.SqlCommand
Dim clsCMAdapter = New SqlClient.SqlDataAdapter("SELECT * FROM CatalogMaster WHERE Processed <>-1", clsCnn)
Dim clsCMDataTable = New DataTable("CatalogMaster")

[code]....

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.net - SqlCommand.ExecuteScalar - Specify A Particular Data Item?

Jun 1, 2011

I have a Stored Procedure which returns 10 columns of data. Using cmd.ExecuteScalar() returns the value of the 1st column from the 1st record. How can I change this so that I can return different columns, by specifying their alias/dataitem name?

I want to be able to do something like: Dim FirstName as String = cmd.ExecuteScalar("FirstName")

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Are Object SqlConnection And SQLCommand Disposed

May 20, 2010

[code]in this code, do the objects con and cmd get disposed because the return statement is placed before the end using statement.

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Assign Date To SqlCommand Parameter?

Nov 19, 2009

sqlCmd.Parameters.Add(New SqlParameter("@DateCreated", SqlDbType.DateTime)).Value = CDate(Now)

it throws error. Kindly suggest how can I assign date to sqlcmd parameter.

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Capture SQL With Parameters Substituted In (.NET - SqlCommand)?

May 19, 2010

If there an easy way to get a completed SQL statement back after parameter substitution? I.e., I want to keep a logfile of all the SQL this program runs. Or if I want to do this, will I just want to get rid of Parameters, and do the whole query the old school way, in one big string? Simple Example: I want to capture the output:

[Code]...

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Create A Lookup Using SqlCommand Select

Apr 8, 2009

I am almost finished building my application. All the data need is being inputted from various locations. I have a form that is suppose to consolidate all this data into a specific format. There are 47 fields that have to be populated and/or calculated based on two fields, the Username and a date range (this part is done). I was trying to set each of the TextBoxes equal to the SQLCommand that would return the proper value, but i am not calling it correctly. Would somebody please take look, is there something i am missing, do i need to write it in a function? I have had to use the Select statement itself in a couple of filters so I'm pretty sure that is correct, but i need help getting it to run the sqlcommand.[code]

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Possible To Run An SQL Script With System.Data.Sql.SqlCommand?

Oct 23, 2009

After the SQL Publishing Wizard has generated a database script I would like to know if it would be possible to execute the whole SQL script using the SqlCommand object, to recreate the database all over again, in case anything goes wrong?

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SQLCommand Insert Netstat Results

Feb 8, 2012

I have a VB.net script that runs a simulation on several machines within the domain. During this simulation, a login is initiated to an application via a web portal. After the login, the connection to a specific Citrix server (whichever is least busy) is established. At this point, I want to run a Netstat -r | find (IP Range of server farm) in command line. From what I have deduced, I probably won't be able to do what I want from the command line and everything will have to be with in the VB.net module using System.Net.NetworkInformation. I am a Citrix Administrator with a decent level of .net experience but I am having trouble with this.

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Sqlcommand.ExecuteScalar Return Dbnull?

Apr 17, 2009

i tried this sqlcommand select max(food) from foods and i tried this dim x as double=cdbl(cmd.executescalar)and it throws the the exception {System.Invalid CastException}because the food table is empty and the max(food) is null how can i fix that because i want to take the value and add one to it so do i need to catch the error or try another conversion option?

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Value Of Type String Cannot Be Converted To SQLCommand

Apr 11, 2011

I'm a novice VB programmer and I am getting the above error when I try to display the results of one of my Stored Procs in SQL Server which doesn't need any parameters.

My code excerpt:
Dim SQLCmd as SQLCommand = new SQLCommand()
SQLCmd.CommandText = "Exec AllTableCount"
SQLCmd.CommandType = CommandType.StoredProcedure
SQLCmd.Connection = GlobalFunctions.GlobalF.GetDevSQLServerStoredProcedure(SQLCmd.CommandType)
SQLCmd.ExecuteNonQuery()
[Code] .....

I can see this SP from VS 2008 in the Server Explorer. So the problem seems to be that I don't know how to connect a data adapter to an SP. Just a string query.

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Evaluates Loop Condition In Do...Loop Statment To Determine Whether Loop Instructions Should Be Processed

Mar 14, 2011

Makes the following statement about the code below:

**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.

Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?

See below.

Option Explicit On
Option Strict On

Imports System.Globalization

[CODE]...

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Auto-CompleteExtender SqlCommand Select Statement?

Feb 6, 2010

I'm using the following select statement and it works fine but I need it to AutoComplete the results that contain the term as well and not just the results that start with the term. To clarify, if I type in "phrase" it won't AutoComplete the result "my phrase" but if I type in "my" it will. Anyone have a clue what I'm doing wrong? I've tried to use "contains @term" instead of "like @term" but

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Using SqlCommand Object In - One Open Connection In One Procedure

Nov 5, 2009

Can I use two command object with one open connection in one procedure at VB.NET?

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.net - View T-SQL Syntax Of A Stored Proc-based SqlCommand?

Mar 18, 2010

retrieve the actual T-SQL that is to be executed by a SqlCommand object (with a CommandType of StoredProcedure) before it executes...My scenario involves optionally saving DB operations to a file or MSMQ before the command is actually executed. My assumption is that if you create a SqlCommand like the following:

Using oCommand As New SqlCommand("sp_Foo")
oCommand.CommandType = CommandType.StoredProcedure
oCommand.Parameters.Add(New SqlParameter("@Param1", "value1"))
oCommand.ExecuteNonQuery()
End Using

It winds up executing some T-SQL like:

EXEC sp_Foo @Param1 = 'value1'

Is that assumption correct? If so, is it possible to retrieve that actual T-SQL somehow? My goal here is to get the parsing, validation, etc. benefits of using the SqlCommand class since I'm going to be using it anyway.

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