Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

load a db table from excel

Posted on 2006-10-23
7
208 Views
Last Modified: 2010-04-16
I am new to .net and i wanted to know how to implemnet thisi project that i have  been given and wanted an experts advice on the best way to implement the project.Plz advice.

Requiremnets:

Read from multiple sheets of an excel file  and load the single sql db table with this data from the excel file and also run a stored procedure in the background
to manupilate other db tables using this table.
This is an windows application.
Thank you.
0
Comment
Question by:pgupta81
  • 2
  • 2
  • 2
  • +1
7 Comments
 
LVL 29

Expert Comment

by:Gautham Janardhan
ID: 17793627
If its a one time requirement u can directly import data from excel into sql table using DTS.
In EM , rt click DATABSE, all tasks - Import and there u give source and destination, Ur source will be excel file
0
 
LVL 5

Expert Comment

by:rameedev
ID: 17793709
IF it is not a One time requirement then

On some Button Click Event (Or whatever is the UI event)...You could probably do something like this


Function LoadDataFrom ExcelAndUpdateDB()
{
    // Write your Code for filling some dataset from the Excel file
    // This Could return a DataSet
   
    foreach(DataRow dr in DataSet.Tables[0].Rows)
    {
        //Write your Code to take all the rows from the datatable and call your SP
    }
}


0
 

Author Comment

by:pgupta81
ID: 17794078
I have to develop a windows application on this thats why i cannot use EM DTS to do this..

How to iterate through multiple sheets of excel to load sql table?
Do i need to follow certain naming convention ?
0
Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

 
LVL 8

Accepted Solution

by:
redpipe earned 125 total points
ID: 17794194
The following function takes a complete filepath to an Excel file and returns all sheetnames in the file as an string array.

public string[] GetSheetNames(string FilePath)
    {
      string connString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                          "Data Source=" + FilePath + ";" +
                          "Extended Properties=\"Excel 8.0;HDR=YES\"";
      OleDbConnection conn = null;
      string[] xlsSheets = null;
      DataTable dt = null;
      try {
        using (conn = new OleDbConnection(connString)) {
          if (conn.State != ConnectionState.Open) { conn.Open(); }
          dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
          if ((dt != null) || (dt.Rows.Count > 0)) {
            xlsSheets = new String[dt.Rows.Count];
            int i = 0;
            string sheetName;
            foreach (DataRow row in dt.Rows) {
              sheetName = row["TABLE_NAME"].ToString();
              if (sheetName.StartsWith("'")) { sheetName = sheetName.Remove(0, 1); }
              if (sheetName.EndsWith("'")) { sheetName = sheetName.Remove(sheetName.Length - 1, 1); }
              if (sheetName.EndsWith("$")) { sheetName = sheetName.Remove(sheetName.Length - 1, 1); }
              xlsSheets[i] = sheetName;
              i++;
            }
          }
        }
      } finally {
        if (conn != null) {
          try {
            conn.Close();
            conn.Dispose();
            conn = null;
          } catch (OleDbException exOleDb) {
            Logger.LogException(exOleDb);
          }
        }

        if (dt != null) {
          dt.Dispose();
        }
      }
      return xlsSheets;
    }
0
 
LVL 29

Expert Comment

by:Gautham Janardhan
ID: 17794198
Dim DS As System.Data.DataSet
Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
Dim MyConnection As System.Data.OleDb.OleDbConnection

MyConnection = New System.Data.OleDb.OleDbConnection( _
      "provider=Microsoft.Jet.OLEDB.4.0; " & _
      "data source=C:\myData.XLS; " & _
      "Extended Properties=Excel 8.0;")
' Select the data from Sheet1 of the workbook.
MyCommand = New System.Data.OleDb.OleDbDataAdapter( _
      "select * from [Sheet1$]", MyConnection)

DS = New System.Data.DataSet()
MyCommand.Fill(DS)
MyConnection.Close()
0
 
LVL 8

Expert Comment

by:redpipe
ID: 17794202
Forgot to submit the function for retrieving data from a given sheet.

public DataTable GetData(string FilePath, string SheetName, bool FirstRowIsHeader)
{
      string connString = null;
      if (FirstRowIsHeader) {
        connString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                     "Data Source=" + FilePath + ";" +
                     "Extended Properties=\"Excel 8.0;HDR=YES\"";
      } else {
        connString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                    "Data Source=" + FilePath + ";" +
                    "Extended Properties=\"Excel 8.0;HDR=NO\"";
      }
      OleDbConnection conn = null;
      OleDbCommand cmd = new OleDbCommand();
      DataTable dt = null;
      IDataReader dr = null;
      try {
        using (conn = new OleDbConnection(connString)) {
          if (conn.State != ConnectionState.Open) { conn.Open(); }
          cmd.Connection = conn;
          cmd.CommandText = "SELECT * FROM [" + SheetName + "$]";
          OleDbDataAdapter adapter = new OleDbDataAdapter();
          adapter.SelectCommand = cmd;
          dt = new DataTable(SheetName);
          adapter.FillSchema(dt, SchemaType.Source);
          adapter.Fill(dt);
        }
      } finally {
        if (cmd != null) {
        cmd.Dispose();
        cmd = null;
      }

      if (dr != null) {
        dr.Close();
        dr.Dispose();
        dr = null;
      }

      if (conn != null) {
        try {
          conn.Close();
          conn.Dispose();
          conn = null;
        } catch (OleDbException exOleDb) {
          Logger.LogException(exOleDb);
        }
      }
      }
      return dt;
    }
0
 

Author Comment

by:pgupta81
ID: 17891855
code Helped!! Thanks
0

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Question! 4 39
2 questions 10 29
Following an example - Why do I need to click Save button twice? 3 29
VS2013 publish C# application Created folder -- where is it??? 10 28
Article by: Ivo
C# And Nullable Types Since 2.0 C# has Nullable(T) Generic Structure. The idea behind is to allow value type objects to have null values just like reference types have. This concerns scenarios where not all data sources have values (like a databa…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question