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  #1 (permalink)  
Old June 27th, 2007, 09:17 PM
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Default Importing Excel Data into a new Dataset

As per the subject title I am trying to create a dataset from scratch - populating with Excel data. I have come across some code that looks like it would do the job (taking two tables and putting them into one dataset):



Program FromDB uses this code to create a DataSet from scratch

Imports System.Data.SqlClient

Public Class Form1

Inherits System.Windows.Forms.Form



' Data adapter for the Students table.

Dim m_daStudents As New SqlDataAdapter( _

"SELECT * FROM Students", _

"User Id=sa;" & _

"Data Source=BENDER\NetSDK;" _

"Initial Catalog=TestScores")



' Data adapter for the TestScores table.

Dim m_daTestScores As New SqlDataAdapter( _

"SELECT * FROM TestScores", _

"User Id=sa;" & _

"Data Source=BENDER\NetSDK;" _

"Initial Catalog=TestScores")



' The DataSet.

Private m_DataSet As New DataSet("Student Scores")

Private Sub Form1_Load(ByVal sender As System.Object, _

ByVal e As System.EventArgs) Handles MyBase.Load



' Load the Students table.

m_daStudents.TableMappings.Add("Table", "Students")

m_daStudents.Fill(m_DataSet)



' Load the TestScores table naming



' the new table TestScores.

m_daTestScores.Fill(m_DataSet, "TestScores")



' Bind the DataGrid to the DataSet.

DataGrid1.DataSource = m_DataSet

End Sub

End Class





Now I would need to change replace the SqlDataAdapter objects with OleDbDataAdapter objects for excel,.... but I still have another couple of queries on the code:



1. I don't understand what the "User" or the "Initial Catalog" codes in the data adapters does. What is their purpose?

1a. This may be answered above,.... but why are both Initial Catalog = TestScores?

2. Other than using "Students" and "TestScores," what is the difference between the coding

i - m_daStudents.TableMappings.Add("Table","Students")

m_daStudents.Fill(m_DataSet, and

ii - m_daTestScores.Fill(m_DataSet, "TestScores")?



Is there an easier way to do all of this?




Juan

JP.
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Old July 3rd, 2007, 02:18 PM
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Default

Have you used the Import/Export Data Task Wizards? (I am 'assuming' you are using SQL 2005 - if you aren't, this won't apply.)

That is the absolute easiest way to populate data from Excel.

Unless, of course, I am not understanding what you are really trying to do ...

The initial catalog is the name of the database you are using.
The user id is exactly what it says.

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Old July 4th, 2007, 09:03 PM
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Default

thanks kscase

gus


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