oledb

问题 [Sample.xlsx] Column 0, Row 0 = "ItemA" Column 0, Row 1 = "ItemB" Column 0, Row 2 = "ItemC" Column 0, Row 3 = "ItemD" [Application] DataSet dsData = new DataSet(); string strConn = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=Sample.xlsx;Extended Properties='Excel 12.0;'"; OleDbDataAdapter daGetExcel = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strConn); daGetExcel.Fill(dsData); foreach (DataRow row in dsData.Tables[0].Rows) { lbExcelData.Items.Add(row[0].ToString()); } lbExcelData is

问题 Attempting to execute an update command against an Excel 2007 file gives the error: Operation must use an updateable query. I'm using System.Data.OleDb with a connection string like this: Dim strConn As String = "Provider=Microsoft.ACE.OLEDB.12.0;" & _ "Data Source=""" & pathToFile & """;" & _ "Extended Properties=""Excel 12.0;HDR=YES""" I have tried setting ReadOnly=false but that gives Could not find installable ISAM. I have also tried setting Mode=ReadWrite and IMEX=1 which didn't seem to

问题 Using taglib-sharp and OleDb, I'm attempting to index a folder of music files and store all the metadata from said files in an Access Database (I'll probably switch to SQL Compact or something later but the book I have uses Access). The below code should retrieve and store the metadata of the first 1000 files in a given folder and subfolders OleDbCommand cmd = con.CreateCommand(); DirSearch(@"C:\Users\Stephen\Music"); TagLib.File tagFil; for (int i = 0; i < 1000; i++) { tagFil = TagLib.File

问题 I have an ASP.NET page that needs to push some data to an older program that uses an Access 2003 database for a backend. I have my connection strings all set up to do this (successful to a local copy of the DB) but when I try to read from the database on its network share location, I get the following error: Record(s) cannot be read; no read permission on 'tblDevice'. There are no passwords or any security on the database, so I'm pretty sure this is network related. I'm not aware of any way

问题 I have written to append functions that insert data from custom c# list into MSAccess. The first simply sets up a new connection for each individual recordset: public static void appenddatatotable(string connectionstring, string tablename, string[] values) { var myconn = new OleDbConnection(connectionstring); var cmd = new OleDbCommand(); cmd.CommandText = "INSERT INTO " + tablename + " ([RunDate],[ReportingGroup], [Tariff], [Year]) VALUES(@RunDate, @ReportingGroup, @Tariff, @Year)"; cmd

问题 I'm trying to build a webpage that allows a user to choose an excel file and then the page will read the contents of the page and upload the data to the DB after validation. I have a fileUpload asp control with a button for execution and a gridview to display the data. This isn't the end-goal, but I have it simply to test if the script is reading the file successfully (which it isn't). The error I keep getting is: "The Microsoft Office Access database engine could not find the object 'Sheet1'

问题 I am trying to update multiple rows in a access database using parameters. I already have to code to insert to a database, but I need same type of code to update the database. My update string looks like this Update tblitem set instock='value' where itemcode='value2' Here is my code to insert: strSQL = "insert into tbltrans2 (transid,itemcode,itemname,qty,price,[total],btw) values ( ?,?,?,?,?,?,?)" Using cn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Application

问题 I am currently trying to move an application from a Microsoft Access database to an SQL Server Compact Edition one. I have managed to convert the database using SSMA and SQL Toolbox, but I am having some errors using the old c# code for queries (as expected). I have been able to fix things as I go along so far, but I am a bit stumped with this one: OleDbDataAdapter internal error: invalid row set accessor: Ordinal=# Status=UNSUPPORTEDCONVERSION After looking around on stackoverflow and google

问题 I have a query that I'm executing from a .NET application to a SQL Server database and it seems to take quite a while to complete (5+ Minutes). I created a test app in c# to try to see what was talking so long (the query should return quickly). As I was reconstructing the query by adding in elements to see which portion was taking so long, I ended up reconstructing the query practically verbatim where the only difference was the spaces in the original query and a capitalization difference.

问题 private void button1_Click(object sender, EventArgs e) { string tablename = label2.Text; string name = TextBox1.Text; DBconnection.savetodb(tablename, name); } I call the method below from another form to save the name into a specific table. But it wont save into my table in database. public static void savetodb(string tablename, string name) { OleDbConnection connection = GetConnection(); string query = String.Format("INSERT INTO {0} (Name) VALUES (@Name)", tablename); OleDbCommand cmd = new