Importing Excel
I figured this was already posted but I couldn't find it. I'm developing a web app that allowers the user to upload me a formatted excel file and then I need to transfer the data into a database. For the most I got it all working... upload to excel file, throw the data into a dataset and throw the dataset into my table. Whan I'm having trouble with is the first line of the excel file. For whatever reason it's reading the first line as headers. Is there an easy way around that?
Thanks in advance.
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Blackhawksq
11/12/2004 2:22:51 PM
asp.net.web-forms
93655 articles. 
6 followers.
4 Replies
821 Views
Before we dive into our sample code, there are a couple of other points to consider. First, by default, the OLE DB provider for Jet assumes that the first row of your Excel spreadsheet consists of column headings that it can use as field names. This isn't a requirement, but if this isn't the case, then you need to tell the provider. Otherwise, it will very happily make the assumption, and you'll lose the first row of your data. To properly inform the provider, add an HDR element to the Extended Properties component of your ConnectionString, like this:
AdoCn.ConnectionString = _
"Data Source=d:\MySpreadsheet.xls;" & _
"Extended Properties=Excel 8.0;HDR=No;"
There are only two possible values, Yes and No, depending upon whether your spreadsheet contains a header row. If you tell the provider that your spreadsheet doesn't have a header row, it will arbitrarily assume each column a field name of the form F1, F2, etc.
A second issue to bear in mind involves mixing data types. Because Excel doesn't maintain the same kind of detailed information about each field that a relational database would, the OLE DB provider has to make certain assumptions about the data format of each spreadsheet column. It does so by scanning a certain number of rows and examining the data in each column. This has the potential to create problems for you, though, so consider yourself advised to populate columns only with the same internally consistent data. For example, one column might consist of numbers only, while another might contain text data.
kind regard,
piets
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnasdj01/html/asp0193.asp
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pietswieb
11/17/2004 9:25:06 AM
Thanks!.. As for the data types I'm giving users a specific format to put the excel spreadsheet in.. so needless to say someone is going to be messing it up! :).. Thanks again.
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Blackhawksq
11/17/2004 2:09:40 PM
does anyone get an unspecific error when they import data from excel?
System.Data.OleDb.OleDbException: Unspecified error at System.Data.OleDb.OleDbConnectionInternal.InitializeProvider() at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnection conn, OleDbConnectionString constr) at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object providerInfo, DbConnectionBase owningObject) at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnectionBase owningConnection, DbConnectionPoolGroup poolGroup) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnectionBase owningConnection) at System.Data.ProviderBase.DbConnectionClosed.Open(DbConnectionBase outerConnection) at System.Data.ProviderBase.DbConnectionBase.Open() at ASP.excel1_aspx.LoadExcelIntoDS() in c:\excel_dev\excel1.aspx:line 25
<%@ Page language="c#" %>
<%@ Import Namespace="System.Runtime"%>
<%@ Import Namespace="System"%>
<%@ Import Namespace="System.Data"%>
<%@ Import Namespace="System.Data.OleDb"%>
<script runat=server>
void Page_Load(Object src, EventArgs e)
{
LoadExcelIntoDS();
}
void LoadExcelIntoDS()
{
OleDbConnection MyConnection = new OleDbConnection();
try
{
String conn = "Provider=Microsoft.Jet.OLEDB.4.0;";
conn += @"Data Source=C:\excel_dev\demo_banc.xls;";
conn += "Extended Properties=Excel 8.0;";
MyConnection = new OleDbConnection(conn);
MyConnection.Open();
}
catch(ArgumentException ae)
{
Response.Write(ae.ToString() + "<BR>");
}
catch(OleDbException e)
{
String err_msg = "";
for (int i = 0; i < e.Errors.Count; i++)
err_msg += "----------------<br>Index #" + i + "<br>Message: " + e.Errors[i].Message + "<br>NativeError: " + e.Errors[i].NativeError + "<br>Source: " + e.Errors[i].Source + "<br>SQLState: " + e.Errors[i].SQLState + "<br>";
Response.Write(err_msg + "<br>");
Response.Write(e.ToString() + "<BR>");
}
catch(Exception e)
{
Response.Write(e.ToString() + "<br>");
}
finally
{
MyConnection.Close();
}
}
</script>
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hltommy
11/30/2004 11:47:48 PM
solved. pls refer to:
http://www.asp.net/Forums/ShowPost.aspx?tabindex=1&PostID=314899
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hltommy
12/14/2004 9:08:44 PM
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