The below written code working fine for insert a table and its value in Already existing excel file(D:\MySamplefile.xls).
private void WriteToExcel()
{
string connectionString = "Provider=Microsoft.Jet.OleDb.4.0; Data Source=D:\\MySamplefile.xls; Extended Properties=Excel 8.0;";
using (OleDbConnection Connection = new OleDbConnection(connectionString))
{
Connection.Open();
using (OleDbCommand command = new OleDbCommand())
{
command.Connection = Connection;
command.CommandText = "CREATE TABLE [EMPLOYEE](EmpFirstName Char(100), EmpLastName char(100), EmpDept char(250))";
command.ExecuteNonQuery();
}
//Add values to the table (EMPTable) in the Worksheet
string strSql = "INSERT INTO EMPLOYEE (EmpFirstName, EmpLastName, [EmpDept]) VALUES (?, ?, ?)";
using (OleDbCommand dbCmd = new OleDbCommand(strSql, Connection))
{
dbCmd.CommandType = CommandType.Text;
dbCmd.Parameters.AddWithValue("EmpFirstName", "xyz");
dbCmd.Parameters.AddWithValue("EmpLastName", "abc");
dbCmd.Parameters.AddWithValue("[EmpDept]", "pqr");
dbCmd.ExecuteNonQuery();
}
}
}
My requirement is that, I need to write the same thing on a newly created excel worksheet, which not saved any where.For new excel doc creation code given below.
public void createExcelDoc( int rowHeight,int sizeCol1, int sizeCol2)
{
app = new Application();
app.Visible = true;
workbook = app.Workbooks.Add(1);
worksheet = (Worksheet)workbook.Sheets[1];
worksheet.Columns[1].ColumnWidth = 5;
worksheet.Rows.RowHeight = rowHeight;
worksheet.Columns[2].ColumnWidth = sizeCol1;
worksheet.Columns[3].ColumnWidth = sizeCol2;
workbook.Windows.Application.WindowState = XlWindowState.xlMaximized;
}
I need to replace connectionString in WriteToExcel() method Data Source=D:\\MySamplefile.xls; to some thing else. I have no idea.
You can connect to Excel via OleDb, just like with Access. Connection string examples can be found here:
https://www.connectionstrings.com/excel/
For clarity, an old (.xls) file would look like this:
string connectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;" +
#"Data Source=D:\MySamplefile.xls;Extended Properties=Excel 8.0;";
HOWEVER, it this does seem a little overkill for what your method is doing. Where is the data coming from what you're inserting into Excel? There may be better (and simpler) ways to do this.
Related
I want to insert record in excel start from 5th row to nth row using OleDbConnection connection. anyone having any code in c#, it will be really helpfull for me.
Thanks in advance
assuming you have 3 columns in your excel table
OleDbConnectionStringBuilder connStringBuilder = new OleDbConnectionStringBuilder();
connStringBuilder.DataSource =tmpFilePath; // Set path to excel file
connStringBuilder.Provider = "Microsoft.ACE.OLEDB.12.0";
connStringBuilder.Add("Extended Properties", "Excel 12.0;HDR=NO");
string connectionString = connStringBuilder.ConnectionString;
using (OleDbConnection conn = new OleDbConnection(connectionString))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;
DataTable objSheetNames = conn.GetSchema("Tables");
cmd.CommandText = string.Format(#"INSERT INTO [{0}](F1,F2,F3) VALUES('{1}','{2}','{3}');",
objSheetNames.Rows[0][2], "", "", "");
cmd.ExecuteNonQuery();
}
I am trying to create an Excel data uploader to upload Excel files to SQL Server using Winforms in C#.
After bulkcopy.WriteToServer(dr); I get this error :
Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.
The Connection for viewing your linked Microsoft Excel worksheet was lost.
I got information about regedit here and tried to follow it but still the same error:
class Pass
{
static string _excelfilepath;
public static string excelfilepath { get { return _excelfilepath; } set { _excelfilepath = value; } }
public void importdatafromexcel()
{
//declare variables - edit these based on your particular situation
string ssqltable = "tStudent";
// make sure your sheet name is correct, here sheet name is sheet1, so you can change your sheet name if have different
string myexceldataquery = "select idnum,fname,gname,mname,coacro,year,yrstat,sex,stat,telno,addr1,addr2,addr3,dbirth,mothname,fathname,civstat,religion,hssch from [masterlist$]";
try
{
//create our connection strings
string sexcelconnectionstring = #"provider=microsoft.jet.oledb.4.0;data source=" + _excelfilepath +
";extended properties=" + "\"excel 8.0;hdr=yes;\"";
string ssqlconnectionstring = #"Data Source=LYNDON-PC\LYNDON;Initial Catalog=trial;Persist Security Info=True;User ID=sa;Password=14323531";
//execute a query to erase any previous data from our destination table
string sclearsql = "delete from " + ssqltable;
SqlConnection sqlconn = new SqlConnection(ssqlconnectionstring);
SqlCommand sqlcmd = new SqlCommand(sclearsql, sqlconn);
sqlconn.Open();
sqlcmd.ExecuteNonQuery();
sqlconn.Close();
//series of commands to bulk copy data from the excel file into our sql table
OleDbConnection oledbconn = new OleDbConnection(sexcelconnectionstring);
OleDbCommand oledbcmd = new OleDbCommand(myexceldataquery, oledbconn);
oledbconn.Open();
OleDbDataReader dr = oledbcmd.ExecuteReader();
SqlBulkCopy bulkcopy = new SqlBulkCopy(ssqlconnectionstring);
bulkcopy.DestinationTableName = ssqltable;
while (dr.Read())
{
bulkcopy.WriteToServer(dr);
}
oledbconn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
What does the error mean and get the code to upload my Excel file to my table in my database in SQL Server...
I think you should use
bulkcopy.WriteToServer(dr);
instead of using
while (dr.Read())
{
bulkcopy.WriteToServer(dr);
}
I have developed a functionality, where I import Excel sheet to the table. But when I upload the file and click on the button to import. The code doesn't works and gives me the below mentioned error. I tried with DataAdapter but that was also not working. Please see the error below:-
The Microsoft Office Access database engine could not find the object
'TableName'. Make sure the object exists and that you spell its
name and the path name correctly.
Also, Please see the code for your reference:-
private void ImporttoSQL(string sPath)
{
string sSourceConstr1 = string.Format(#"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\AgentList.xls; Extended Properties=""Excel 8.0;HDR=YES;""", sPath);
string sSourceConstr = string.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 Xml;HDR=YES;""", sPath);
OleDbConnection sSourceConnection = new OleDbConnection(sSourceConstr);
using (sSourceConnection)
{
string sql = string.Format("Select [Merchant_Name],[Store_Name],[Store_Address],[City] FROM [MerchantTempDetail]", "Sheet1$");
OleDbCommand command = new OleDbCommand(sql, sSourceConnection);
sSourceConnection.Open();
conn.Open();
using (OleDbDataReader dr = command.ExecuteReader())
{
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(conn))
{
bulkCopy.DestinationTableName = "MerchantTempDetail";
//You can mannualy set the column mapping by the following way.
// bulkCopy.ColumnMappings.Add("Mini_Category_Id", "Mini_Category_Id");
//bulkCopy.ColumnMappings.Add("CategoryId", "CategoryId");
bulkCopy.ColumnMappings.Add("Merchant_Name", "Merchant_Name");
bulkCopy.ColumnMappings.Add("Store_Name", "Store_Name");
bulkCopy.ColumnMappings.Add("Store_Address", "Store_Address");
bulkCopy.ColumnMappings.Add("City", "City");
bulkCopy.WriteToServer(dr);
}
}
}
}
Edited code :-
public static void ExcelToSqlServerBulkCopy()
{
// Connection String to Excel Workbook
// Jet4
string excelConnectionString = #"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=AgentList.xls; Extended Properties=""Excel 8.0;HDR=YES;""";
// Ace Ole db 12
string excelAceOleDb12ConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=AgentList.xls;Extended Properties=""Excel 8.0;HDR=YES;""";
// Create Connection to Excel Workbook
using (OleDbConnection connection = new OleDbConnection(excelAceOleDb12ConnectionString))
{
OleDbCommand command = new OleDbCommand("Select [Merchant_Name],[Store_Name],[Store_Address],[City] FROM [Sheet1$]", connection);
// open excel
connection.Open();
// Create DbDataReader to Data Worksheet
using (DbDataReader dr = command.ExecuteReader())
{
// SQL Server Connection String
string sqlConnectionString = ConfigurationManager.ConnectionStrings["DefaultSQLConnectionString"].ConnectionString;
// Bulk Copy to SQL Server
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString))
{
bulkCopy.DestinationTableName = "MerchantTempDetail";
bulkCopy.WriteToServer(dr);
}
}
}
}
protected void btnImport_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
string sPath = Server.MapPath(FileUpload1.FileName);
FileUpload1.SaveAs(sPath);
ExcelToSqlServerBulkCopy();
}
}
You need to define 2 connections, one for the Excel source, another for the sql database you are bulk copying to. (This code has been tested) If you need to copy to an in-memory data table, use this example on MSDN.
public static void ExcelToSqlServerBulkCopy ()
{
// Connection String to Excel Workbook
// Jet4
string excelConnectionString = #"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=AgentList.xls; Extended Properties=""Excel 8.0;HDR=YES;""";
// Ace Ole db 12
string excelAceOleDb12ConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=AgentList.xls;Extended Properties=""Excel 8.0;HDR=YES;""";
// Create Connection to Excel Workbook
using (OleDbConnection connection = new OleDbConnection(excelAceOleDb12ConnectionString))
{
OleDbCommand command = new OleDbCommand("Select [Merchant_Name],[Store_Name],[Store_Address],[City] FROM [AgentList$]", connection);
// open excel
connection.Open ();
// Create DbDataReader to Data Worksheet
using (DbDataReader dr = command.ExecuteReader ())
{
// SQL Server Connection String
string sqlConnectionString = #"Data Source=.\SQLEXPRESS;Initial Catalog=StackOverflow;Integrated Security=True";
// Bulk Copy to SQL Server
using (SqlBulkCopy bulkCopy = new SqlBulkCopy (sqlConnectionString))
{
bulkCopy.DestinationTableName = "Q26382169";
bulkCopy.WriteToServer (dr);
}
}
}
}
Very important details using variable names above:
the database you are copying to (StackOverflow) must be created a priori.
the destination table (Q26382169) must exist in that database, DDL trivial, same columns as your Excel file.
Since you are using HDR=YES option, first row of Excel sheet must contain specified column names: Merchant_Name, Store_Name, Store_Address, City (without [])
The name of the sheet in the OleDbCommand (AgentList$)
Finally solved by debugging it.
private void ImporttoSQL(string sPath)
{
string sSourceConstr1 = string.Format(#"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\AgentList.xls; Extended Properties=""Excel 8.0;HDR=YES;""", sPath);
string sSourceConstr = string.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 Xml;HDR=YES;""", sPath);
// string sSource = string.Format(#"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + sPath + ";Extended Properties=Excel 8.0", sPath);
// string sDestConstr = ConfigurationManager.ConnectionStrings["DBConnection"].ConnectionString;
OleDbConnection sSourceConnection = new OleDbConnection(sSourceConstr);
using (sSourceConnection)
{
SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultSQLConnectionString"].ConnectionString);
string sql = "Select [Merchant_Name],[Store_Name],[Store_Address],[City] FROM [Sheet1$]";
OleDbCommand command = new OleDbCommand(sql, sSourceConnection);
sSourceConnection.Open();
conn.Open();
using (OleDbDataReader dr = command.ExecuteReader())
{
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(conn))
{
bulkCopy.DestinationTableName = "MerchantTempDetail";
bulkCopy.ColumnMappings.Add("Merchant_Name", "Merchant_Name");
bulkCopy.ColumnMappings.Add("Store_Name", "Store_Name");
bulkCopy.ColumnMappings.Add("Store_Address", "Store_Address");
bulkCopy.ColumnMappings.Add("City", "City");
bulkCopy.WriteToServer(dr);
}
}
}
}
I have excel file with 2 tables. I need to read this tables and get all the values from this tables. But all for what I have is:
OleDbConnection cnn = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\MigrateExelSql\Include\TestDb.xlsx; Extended Properties=Excel 12.0;");
OleDbCommand oconn = new OleDbCommand("select * from [Sheet1$]", cnn);
cnn.Open();
OleDbDataAdapter adp = new OleDbDataAdapter(oconn);
DataTable dt = new DataTable();
adp.Fill(dt);
And I don't uderstand what I need to write for get the all values from Username and Email tables. Here is the .xlsx table TestDb Please can somebody help me, because I'm googling the second day and I have no idea for what I must to do.
And when I try to get values by this method it return me an error:
var fileName = string.Format("{0}\\Include\\TestDb.xlsx", Directory.GetCurrentDirectory());
var connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0}; Extended Properties=Excel 12.0;", fileName);
var adapter = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", connectionString);
var ds = new DataSet();
adapter.Fill(ds, "Username");
var data = ds.Tables["Username"].AsEnumerable();
foreach (var item in data)
{
Console.WriteLine(item);
}
Console.ReadKey();
One more Edit:
string con =
#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\MigrateExelSql\Include\TestDb.xlsx; Extended Properties=Excel 12.0;";
using(OleDbConnection connection = new OleDbConnection(con))
{
connection.Open();
OleDbCommand command = new OleDbCommand("select * from [Sheet1$]", connection);
using(OleDbDataReader dr = command.ExecuteReader())
{
while(dr.Read())
{
var row1Col0 = dr[0];
Console.WriteLine(row1Col0);
}
}
}
Console.ReadKey();
This will read only first column, but when I try to read dr[1] it will return error: Index was outside bound of the array.
Your xlsx file contains only one sheet and in that sheet there is only one column.
A sheet is treated by the OleDb driver like a datatable and each column in a sheet is considered a datacolumn.
You can't read anything apart one table (Sheet1$) and one column (dr[0]).
If you try to read dr[1] then you are referencing the second column and that column doesn't exist in Sheet1.
Just to test, try to add some values in the second column of the Excel file.
Now you can reference dr[1].
I have Excel file shown bellow
I want to read 1st read only all school names & school address & insert them in SchoolInfo table of mySql database.
After that I want to read data for each school & insert it in StudentsInfo table which has foreign key associated with SchoolInfo table.
I am reading excel sheet something like this.
public static void Import(string fileName)
{
string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName +
";Extended Properties=\"Excel 12.0;HDR=No;IMEX=1\"";
var output = new DataSet();
using (var conn = new OleDbConnection(strConn))
{
conn.Open();
var dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
if (dt != null)
foreach (DataRow row in dt.Rows)
{
string sheet = row["TABLE_NAME"].ToString();
var cmd = new OleDbCommand("SELECT * FROM [+"+sheet+"+]", conn);
cmd.CommandType = CommandType.Text;
OleDbDataAdapter xlAdapter = new OleDbDataAdapter(cmd);
xlAdapter.Fill(output,"School");
}
}
}
Now I am having data in datatable of dataset, Now how do I read desired data & insert it in my sql table.
Try the following steps:
Reading from Excel sheet
First you must create an OleDB connection to the Excel file.
String connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + path + ";" +
"Extended Properties=Excel 8.0;";
OleDbConnection xlConn = new OleDbConnection(connectionString);
xlConn.Open();
Here path refers to the location of your Excel spreadsheet. E.g. "D:\abc.xls"
Then you have to query your table. For this we must define names for the table and columns first. Click here to find out how.
Now create the command object.
OleDbCommand selectCmd = new OleDbCommand("SELECT * FROM [Sheet1$]", xlConn);
Now we have to store the ouput of the select command into a DataSet using a DataAdapter
OleDbDataAdapter xlAdapter = new OleDbDataAdapter();
objAdapter1.SelectCommand = selectCmd;
DataSet xlDataset = new DataSet();
xlAdapter.Fill(xlDataset, "XLData");
Save the data into variables
Now extract cell data into variables iteratively for the whole table by using
variable = xlDataset.Tables[0].Rows[row_value][column_value].ToString() ;
Write the data from the variables into the MySQL database
Now connect to the MySQL database using an ODBC connection
String mySqlConnectionString = "driver={MySQL ODBC 5.1 Driver};" +
"server=localhost;" + "database=;" + "user=;" + "password=;";
OdbcConnection mySqlConn = new OdbcConnection(mySqlConnectionString);
mySqlConn.Open();
Construct your INSERT statement using the variables in which data has been stored from the Excel sheet.
OdbcCommand mySqlInsert = new OdbcCommand(insertCommand, mySqlConn);
mySqlInsert.ExecuteScalar()