VS 2010 Filling 2 Comboboxes, 1st Determing Data For 2nd?

Mar 27, 2012

I am having difficulty trying to fill two different comboboxes (cbo) with data from a database. More accurately, the 1st cbo gets filled correctly, but when I attempt to do something similar with the second, I'm getting an error about not being able to use the & Operator in my SQL string (Operator is not defined for string and DataRowView types). So evidently the SelectValue from my combobox isn't acting the way I expect.

The overall goal of what I am attempting to do is to fill two cbo's, one with a list of contracts and a second as a list of parts given the selected contract from the first cbo. There are 3 tables in the database that I am drawing the data from: the "contract" table, the "parts" table, and a bridge table called "partList" that has foreign keys pointing to the two other tables. The first cbo is a basic query to the "contract" table using "ContractName" as the display member and "idContract" as the value member. The 2nd cbo I would like to display the name of the part from the "parts" table but use the id of the part from the "partsList" table, and to further filter this list based on what contract was selected.

I am writing the code in VB.Net from VS 2010, storing the data in a MySQL DB, and using a DBFactory to create all the components from ".GetFactory(MySql.Data.MySqlClient)"Below is the code that has the two places I am attempting to fill the two cbo's. Also if there is a better way to handle this, please let me know.

[Code]...

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My problem in the Combo Box and SQL query .. I have three comboboxes linked to an Access 2007 database

[Code]...

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I finally got this code to work:
vb
Dim path As String = OpenFileDialog1.FileName
Dim myDataset As New DataSet()
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So replace:
vb
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With:
vb
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I would like to do something like this if I could:
vb
For x = 1 To xldoc.rows.length - 1
DataGridView1.Item(0, x).Value = CType(xlDoc.Cells(0, x + 1), Excel.Range).Text
Next

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[Code]...

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[Code]....

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[Code]...

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Public Class frmCalculatedAnalyte
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Public Sub New()

[code]....

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[Code]...

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[Code]...

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........
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my code so far

Imports
System.Data.OleDb
Public

[code]....

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[code].....

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[Code]...

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Info:
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Dim con As New SqlConnection

[code].....

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[code]....

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[Code]......

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Code:
Imports System.Data.SqlClient
Public Class Main[code]....

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Code:
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Exceptions

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