Parametrized Insert Query Not Working?

Nov 3, 2011

I am trying to run what I thought was a rather simple parameterized insert query, but am running into all sorts of problems. SQL EXPRESS 08R2, VB.net

Here is the VB code that builds the parameters...
UPDATED Variable names:

itemDataSource1.ConnectionString = ConfigurationManager.ConnectionStrings("MyConnectionString").ToString()
itemDataSource1.InsertCommandType = SqlDataSourceCommandType.StoredProcedure
itemDataSource1.InsertParameters.Add("@short_Text", short_Text)

[Code]....

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Now that I've switched over to parameterized queries, everything is great except along with handling all the special characters that would otherwise disrupt an all text SQL stament, it's handling the word NULL. My code basically does this for every variable used in the entire SQL statement:

If strCallName = "" Then
strCallName = "NULL"
End If

[Code]...

and that worked great for my old all text ones because leaving the word NULL out of single quotes would tell it yeah, that's actually null and pass it a true null value. Now with parameterized ones, it's literally passing it the word NULL I tried just leaving the string empty but then when I try to execute the command, it says that the parameter cannot be a zero length string. So how do you give a null value to a a parameterized query and make it actually send that to the database in the statement? Would strCallName = vbNull work or would it still say it's a zero length string?

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I got the whole database thing figured out now I've got a problem with these parametrized queries. If I remove them and just explicitly put in the data I'm looking for the datareader works, however doing as I have below returns no results in the datareader.

[Code]...

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I'm writing small VB.Net app which should build reports based on data gathered from some external MDB-files (Access 2007).

It was planned that this app will use parametrized SQL queries to collect data from DBs.

One of the parameters for these queries is path to the external MDB-file.

Here goes sample code:

Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:TempTemp.mdb;")
conn.Open()

[Code]....

Looks simple but doesn't works. After launch my app throws following exception - System.Data.OleDb.OleDbException: Disk or network error.

Have spent a whole day to make it work with no success. What have I done wrong?

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I'm writing small VB.Net app which should build reports based on data gathered from some external MDB-files (Access 2007). It was planned that this app will use parametrized SQL queries to collect data. One of the parameters for these queries is path to the external MDB-file.

Here goes sample code:

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[Code]....

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The data was being read from a Gridview which had the html encoding. The solution was the following...

Dim Sht_Text As String = HttpUtility.HtmlDecode(row.Cells.Item(0).Text)

I am trying to prevent from having to escape apostrophes and other special characters in my string variables by using a parameterized query with an OleDbConnection. I have all of the parameters in the same order, the insert is working, it just does not maintain the characters. I keep getting those pesky html codes. I am trying to insert into an Access db from a web pages. As I mentioned, its working, just not the special characters.

Here's the code:

Dim pConn As New OleDb.OleDbConnection pConn = New OleDbConnection(cb.ConnectionString)
Dim SqlString As String = "INSERT INTO Strings (Mlt_String_ID, Lng_ID, Strg_Name, Sht_Text, Lng_Text, Alt_Text) Values (?, ?, ?, ?, ?, ?)"

[code]....

jp and en records already existed, the insert of fr record pushes the html codes for the small circle which represents the degree symbol. Happens for all other special characters as well.

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Visual Studio 2008VB.NETFramework 3.5Windows Application

I have a SQL database names TestSQLVB

In it a table called tblTest2, with a three fieldstest2id , int, pk, increment by 1field1, varchar(50)field2, varchar(50)

I have a dataset named Dataset2.xsd

A tableadapter named tblTest2TableAdapter

A insert query names InsertTest2 with fields @f1, @f2 and ExecuteMode = Scalar

When I run the following code per MSDN [URL] the database does not get updated.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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[code]....

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Imports System.Data.SqlClient
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[code].....

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This is the updated code:

sql = "INSERT INTO Strings (String_Name, Long_Text, Short_Text, Alternate_Text, Multi_String_ID, Lang_ID) VALUES (?,?, ?,?,?,?)"
Dim command = New OleDbCommand(sql, pConn)
command.Parameters.AddWithValue("@webStringName", "String_Name")

[code]....

I am trying to create and INSERT statement with and OLE adapter. I had it working without paramtersm but now I am trying to add parms and am having issues with the syntax.Here is the code so far...

command = New OleDbCommand(sql, pConn)
sql = "INSERT INTO Strings (String_Name, Long_Text, Short_Text) VALUES (?,?, """ & ptsShortText & """)"
command.Parameters.Add("@webStringName", OleDbType.VarChar, 250, "String_Name")
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[code]....

Was just trying to get the first two variables parametrized.

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[Code]...

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[Code].....

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[code]......

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[Code]...

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[code].....

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[code].....

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[Code]....

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