Develop Reference

How To insert data into SQL Sever with C# without using the database wizard(visual studio)

I'm having trouble inserting data into my table called "client" in my database called "vet".
I'm trying to do the connection manually as opposed to using the database wizard. I want to do it this way so that i can hide the majority of my code in a separate class.
I have a feeling I have the logic for this all wrong as I'm not making use of a data set, I was hoping someone could point me in the right direction.
This is for a school assignment and not for real world use. I have read a number of similar posts but am still unable to come to a solution.
public void CommitToDatabase()
{
using (var con = new SqlConnection(CLSDatabaseDetails.GlobalConnectionString))
{
DataTable client = new DataTable();
DataSet ds = new DataSet();
string commandString = "SELECT * FROM client";
SqlCommand cmd = new SqlCommand(commandString, con);
con.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(client);
DataRow newClientRow = ds.Tables["client"].NewRow();
newClientRow["ClientID"] = ClientID;
newClientRow["FirstName"] = FirstName;
newClientRow["LastName"] = LastName;
newClientRow["Phone"] = PhoneNumber;
newClientRow["CAddress"] = Address;
newClientRow["Email"] = Email;
newClientRow["CUsername"] = Username;
newClientRow["CPassword"] = Password;
client.Rows.Add(newClientRow);
da.Update(client);
}
}

A DataSet is a collection of DataTables. In your example, you're only referring to one table. The SqlDataAdapter.Fill method will populate either DataSet or DataTable. You're calling da.Fill(client) which is fine - it will fill the DataTable client. You could also call da.Fill(ds, "client") which will fill the DataSet ds. You can then extract your table via ds.Tables["client"]. Using a DataSet in this example is overkill, but you can show your tutor how a DataSet works.
You're filling the DataTable but then adding the new row with reference to the DataSet. But in your example, the DataSet ds has nothing in it, because you filled the DataTable not the DataSet. Try this:
DataSet ds = new DataSet();
string commandString = "SELECT TOP 0 * FROM client";
SqlCommand cmd = new SqlCommand(commandString, con);
con.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
SqlCommandBuilder builder = new SqlCommandBuilder(da);
da.Fill(ds, "client");
DataTable client = ds.Tables["client"];
DataRow newClientRow = client.NewRow();
... ... ...
client.Rows.Add(newClientRow);
builder.GetInsertCommand();
da.Update(client);
If you only want to insert a row, you don't need to SELECT all the rows. If you SELECT TOP 0 * from client you'll get the column names (which you need) but without the overhead of returning all the rows.

Try something like this:
public void CommitToDatabase()
{
using (var con = new SqlConnection(CLSDatabaseDetails.GlobalConnectionString))
{
DataTable client = new DataTable();
string commandString = "SELECT * FROM client";
SqlCommand cmd = new SqlCommand(commandString, con);
con.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(client);
DataRow newClientRow = client.NewRow();
newClientRow["ClientID"] = ClientID;
newClientRow["FirstName"] = FirstName;
newClientRow["LastName"] = LastName;
newClientRow["Phone"] = PhoneNumber;
newClientRow["CAddress"] = Address;
newClientRow["Email"] = Email;
newClientRow["CUsername"] = Username;
newClientRow["CPassword"] = Password;
client.Rows.Add(newClientRow);
da.Update(client);
}
}

I can't tell what the source of your data is. Anyway, here are two examples of moving data from a CSV file to SQL Server and from a DataGridView to SQL Server.
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Data.SqlClient;
using System.IO;
using Microsoft.VisualBasic.FileIO;
using System.Data.Odbc;
using System.Data.OleDb;
using System.Configuration;
public class Form1
{
private void Button1_Click(System.Object sender, System.EventArgs e)
{
dynamic headers = (from header in DataGridView1.Columns.Cast<DataGridViewColumn>()header.HeaderText).ToArray;
dynamic rows = from row in DataGridView1.Rows.Cast<DataGridViewRow>()where !row.IsNewRowArray.ConvertAll(row.Cells.Cast<DataGridViewCell>.ToArray, c => c.Value != null ? c.Value.ToString : "");
string str = "";
using (IO.StreamWriter sw = new IO.StreamWriter("C:\\Users\\Excel\\Desktop\\OrdersTest.csv")) {
sw.WriteLine(string.Join(",", headers));
//sw.WriteLine(String.Join(","))
foreach (void r_loopVariable in rows) {
r = r_loopVariable;
sw.WriteLine(string.Join(",", r));
}
sw.Close();
}
}
private void Button2_Click(System.Object sender, System.EventArgs e)
{
//Dim m_strConnection As String = "server='Server_Name';Initial Catalog='Database_Name';Trusted_Connection=True;"
//Catch ex As Exception
// MessageBox.Show(ex.ToString())
//End Try
//Dim objDataset1 As DataSet()
//Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
//Dim da As OdbcDataAdapter
System.Windows.Forms.OpenFileDialog OpenFile = new System.Windows.Forms.OpenFileDialog();
// Does something w/ the OpenFileDialog
string strFullPath = null;
string strFileName = null;
TextBox tbFile = new TextBox();
// Sets some OpenFileDialog box options
OpenFile.Filter = "CSV Files (*.csv)|*.csv|All files (*.*)|*.*";
// Shows only .csv files
OpenFile.Title = "Browse to file:";
// Title at the top of the dialog box
// Makes the open file dialog box show up
if (OpenFile.ShowDialog() == DialogResult.OK) {
strFullPath = OpenFile.FileName;
// Assigns variable
strFileName = Path.GetFileName(strFullPath);
// Checks to see if they've picked a file
if (OpenFile.FileNames.Length > 0) {
tbFile.Text = strFullPath;
// Puts the filename in the textbox
// The connection string for reading into data connection form
string connStr = null;
connStr = "Driver={Microsoft Text Driver (*.txt; *.csv)}; Dbq=" + Path.GetDirectoryName(strFullPath) + "; Extensions=csv,txt ";
// Sets up the data set and gets stuff from .csv file
OdbcConnection Conn = new OdbcConnection(connStr);
DataSet ds = default(DataSet);
OdbcDataAdapter DataAdapter = new OdbcDataAdapter("SELECT * FROM [" + strFileName + "]", Conn);
ds = new DataSet();
try {
DataAdapter.Fill(ds, strFileName);
// Fills data grid..
DataGridView1.DataSource = ds.Tables(strFileName);
// ..according to data source
// Catch and display database errors
} catch (OdbcException ex) {
OdbcError odbcError = default(OdbcError);
foreach ( odbcError in ex.Errors) {
MessageBox.Show(ex.Message);
}
}
// Cleanup
OpenFile.Dispose();
Conn.Dispose();
DataAdapter.Dispose();
ds.Dispose();
}
}
}
private void Button3_Click(System.Object sender, System.EventArgs e)
{
SqlConnection cnn = default(SqlConnection);
string connectionString = null;
string sql = null;
connectionString = "data source='Server_Name';" + "initial catalog='Database_Name';Trusted_Connection=True";
cnn = new SqlConnection(connectionString);
cnn.Open();
sql = "SELECT * FROM [Order Details]";
SqlDataAdapter dscmd = new SqlDataAdapter(sql, cnn);
DataSet ds = new DataSet();
dscmd.Fill(ds);
DataGridView1.DataSource = ds.Tables(0);
cnn.Close();
}
private void ProductsDataGridView_CellFormatting(object sender, System.Windows.Forms.DataGridViewCellFormattingEventArgs e)
{
if (e.ColumnIndex == DataGridView1.Columns(3).Index && e.Value != null) {
//
if (Convert.ToInt32(e.Value) < 10) {
e.CellStyle.BackColor = Color.OrangeRed;
e.CellStyle.ForeColor = Color.LightGoldenrodYellow;
}
//
}
//
}
//Private Sub ProductsDataGridView_CellFormatting(ByVal sender As Object, _
// ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) _
// Handles DataGridView1.CellFormatting
// '
// If e.ColumnIndex = DataGridView1.Columns("DataGridViewTextBoxColumn8").Index _
// AndAlso e.Value IsNot Nothing Then
// '
// If CInt(e.Value) < 5 Then
// e.CellStyle.BackColor = Color.OrangeRed
// e.CellStyle.ForeColor = Color.LightGoldenrodYellow
// End If
// '
// End If
// '
//End Sub
//If e.ColumnIndex = ProductsDataGridView.Columns(4).Index _
//AndAlso e.Value IsNot Nothing Then
//'
// If CInt(e.Value) = 0 Then
// e.CellStyle.BackColor = Color.OrangeRed
// e.CellStyle.ForeColor = Color.LightGoldenrodYellow
// End If
//End If
// ''To (you need to change the column name)
// If e.ColumnIndex = ProductsDataGridView.Columns("YourColumnName").Index _
// AndAlso e.Value IsNot Nothing Then
//'
// If CInt(e.Value) = 0 Then
// e.CellStyle.BackColor = Color.OrangeRed
// e.CellStyle.ForeColor = Color.LightGoldenrodYellow
// End If
//End If
private void Button4_Click(System.Object sender, System.EventArgs e)
{
DataTable tblReadCSV = new DataTable();
tblReadCSV.Columns.Add("FName");
tblReadCSV.Columns.Add("LName");
tblReadCSV.Columns.Add("Department");
TextFieldParser csvParser = new TextFieldParser("C:\\Users\\Excel\\Desktop\\Employee.txt");
csvParser.Delimiters = new string[] { "," };
csvParser.TrimWhiteSpace = true;
csvParser.ReadLine();
while (!(csvParser.EndOfData == true)) {
tblReadCSV.Rows.Add(csvParser.ReadFields());
}
SqlConnection con = new SqlConnection("Server='Server_Name';Database='Database_Name';Trusted_Connection=True;");
string strSql = "Insert into Employee(FName,LName,Department) values(#Fname,#Lname,#Department)";
//Dim con As New SqlConnection(strCon)
SqlCommand cmd = new SqlCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = strSql;
cmd.Connection = con;
cmd.Parameters.Add("#Fname", SqlDbType.VarChar, 50, "FName");
cmd.Parameters.Add("#Lname", SqlDbType.VarChar, 50, "LName");
cmd.Parameters.Add("#Department", SqlDbType.VarChar, 50, "Department");
SqlDataAdapter dAdapter = new SqlDataAdapter();
dAdapter.InsertCommand = cmd;
int result = dAdapter.Update(tblReadCSV);
}
private void Button5_Click(System.Object sender, System.EventArgs e)
{
string SQLConnectionString = "Data Source=Excel-PC\\SQLEXPRESS;" + "Initial Catalog=Northwind;" + "Trusted_Connection=True";
// Open a connection to the AdventureWorks database.
using (SqlConnection SourceConnection = new SqlConnection(SQLConnectionString)) {
SourceConnection.Open();
// Perform an initial count on the destination table.
SqlCommand CommandRowCount = new SqlCommand("SELECT COUNT(*) FROM dbo.Orders;", SourceConnection);
long CountStart = System.Convert.ToInt32(CommandRowCount.ExecuteScalar());
Console.WriteLine("Starting row count = {0}", CountStart);
// Get data from the source table as a AccessDataReader.
//Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
// "Data Source=" & "C:\Users\Excel\Desktop\OrdersTest.txt" & ";" & _
// "Extended Properties=" & "text;HDR=Yes;FMT=Delimited"","";"
string ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + "C:\\Users\\Excel\\Desktop\\" + ";" + "Extended Properties=\"Text;HDR=No\"";
System.Data.OleDb.OleDbConnection TextConnection = new System.Data.OleDb.OleDbConnection(ConnectionString);
OleDbCommand TextCommand = new OleDbCommand("SELECT * FROM OrdersTest#csv", TextConnection);
TextConnection.Open();
OleDbDataReader TextDataReader = TextCommand.ExecuteReader(CommandBehavior.SequentialAccess);
// Open the destination connection.
using (SqlConnection DestinationConnection = new SqlConnection(SQLConnectionString)) {
DestinationConnection.Open();
// Set up the bulk copy object.
// The column positions in the source data reader
// match the column positions in the destination table,
// so there is no need to map columns.
using (SqlBulkCopy BulkCopy = new SqlBulkCopy(DestinationConnection)) {
BulkCopy.DestinationTableName = "dbo.Orders";
try {
// Write from the source to the destination.
BulkCopy.WriteToServer(TextDataReader);
} catch (Exception ex) {
Console.WriteLine(ex.Message);
} finally {
// Close the AccessDataReader. The SqlBulkCopy
// object is automatically closed at the end
// of the Using block.
TextDataReader.Close();
}
}
// Perform a final count on the destination table
// to see how many rows were added.
long CountEnd = System.Convert.ToInt32(CommandRowCount.ExecuteScalar());
//Console.WriteLine("Ending row count = {0}", CountEnd)
//Console.WriteLine("{0} rows were added.", CountEnd - CountStart)
}
}
//Dim FILE_NAME As String = "C:\Users\Excel\Desktop\OrdersTest.csv"
//Dim TextLine As String
//If System.IO.File.Exists(FILE_NAME) = True Then
// Dim objReader As New System.IO.StreamReader(FILE_NAME)
// Do While objReader.Peek() <> -1
// TextLine = TextLine & objReader.ReadLine() & vbNewLine
// Loop
//Else
// MsgBox("File Does Not Exist")
//End If
//Dim cn As New SqlConnection("Data Source=Excel-PC\SQLEXPRESS;Initial Catalog=Northwind;Trusted_Connection=True;")
//Dim cmd As New SqlCommand
//cmd.Connection = cn
//cmd.Connection.Close()
//cmd.Connection.Open()
//cmd.CommandText = "INSERT INTO Orders (OrderID,CustomerID,EmployeeID,OrderDate,RequiredDate,ShippedDate,ShipVia,Freight,ShipName,ShipAddress,ShipCity,ShipRegion,ShipPostalCode,ShipCountry) values & OrdersTest.csv"
//cmd.ExecuteNonQuery()
//cmd.Connection.Close()
}
private void Button6_Click(System.Object sender, System.EventArgs e)
{
// Define the Column Definition
DataTable dt = new DataTable();
dt.Columns.Add("OrderID", typeof(int));
dt.Columns.Add("CustomerID", typeof(string));
dt.Columns.Add("EmployeeID", typeof(int));
dt.Columns.Add("OrderDate", typeof(System.DateTime));
dt.Columns.Add("RequiredDate", typeof(System.DateTime));
dt.Columns.Add("ShippedDate", typeof(System.DateTime));
dt.Columns.Add("ShipVia", typeof(int));
dt.Columns.Add("Freight", typeof(decimal));
dt.Columns.Add("ShipName", typeof(string));
dt.Columns.Add("ShipAddress", typeof(string));
dt.Columns.Add("ShipCity", typeof(string));
dt.Columns.Add("ShipRegion", typeof(string));
dt.Columns.Add("ShipPostalCode", typeof(string));
dt.Columns.Add("ShipCountry", typeof(string));
using (cn == new SqlConnection("Server='Server_Name';Database='Database_Name';Trusted_Connection=True;")) {
cn.Open();
Microsoft.VisualBasic.FileIO.TextFieldParser reader = default(Microsoft.VisualBasic.FileIO.TextFieldParser);
string[] currentRow = null;
DataRow dr = default(DataRow);
string sqlColumnDataType = null;
reader = My.Computer.FileSystem.OpenTextFieldParser("C:\\Users\\Excel\\Desktop\\OrdersTest.csv");
reader.TextFieldType = Microsoft.VisualBasic.FileIO.FieldType.Delimited;
reader.Delimiters = new string[] { "," };
while (!reader.EndOfData) {
try {
currentRow = reader.ReadFields();
dr = dt.NewRow();
for (currColumn = 0; currColumn <= dt.Columns.Count - 1; currColumn++) {
sqlColumnDataType = dt.Columns(currColumn).DataType.Name;
switch (sqlColumnDataType) {
case "String":
if (string.IsNullOrEmpty(currentRow(currColumn))) {
dr.Item(currColumn) = "";
} else {
dr.Item(currColumn) = Convert.ToString(currentRow(currColumn));
}
break;
case "Decimal":
if (string.IsNullOrEmpty(currentRow(currColumn))) {
dr.Item(currColumn) = 0;
} else {
dr.Item(currColumn) = Convert.ToDecimal(currentRow(currColumn));
}
break;
case "DateTime":
if (string.IsNullOrEmpty(currentRow(currColumn))) {
dr.Item(currColumn) = "";
} else {
dr.Item(currColumn) = Convert.ToDateTime(currentRow(currColumn));
}
break;
}
}
dt.Rows.Add(dr);
} catch (Microsoft.VisualBasic.FileIO.MalformedLineException ex) {
Interaction.MsgBox("Line " + ex.Message + "is not valid." + Constants.vbCrLf + "Terminating Read Operation.");
reader.Close();
reader.Dispose();
//Return False
} finally {
dr = null;
}
}
using (SqlBulkCopy copy = new SqlBulkCopy(cn)) {
copy.DestinationTableName = "[dbo].[Orders]";
copy.WriteToServer(dt);
}
}
}
public static bool GetCsvData(string CSVFileName, ref DataTable CSVTable)
{
Microsoft.VisualBasic.FileIO.TextFieldParser reader = default(Microsoft.VisualBasic.FileIO.TextFieldParser);
string[] currentRow = null;
DataRow dr = default(DataRow);
string sqlColumnDataType = null;
reader = My.Computer.FileSystem.OpenTextFieldParser(CSVFileName);
reader.TextFieldType = Microsoft.VisualBasic.FileIO.FieldType.Delimited;
reader.Delimiters = new string[] { "," };
while (!reader.EndOfData) {
try {
currentRow = reader.ReadFields();
dr = CSVTable.NewRow();
for (currColumn = 0; currColumn <= CSVTable.Columns.Count - 1; currColumn++) {
sqlColumnDataType = CSVTable.Columns(currColumn).DataType.Name;
switch (sqlColumnDataType) {
case "String":
if (string.IsNullOrEmpty(currentRow(currColumn))) {
dr.Item(currColumn) = "";
} else {
dr.Item(currColumn) = Convert.ToString(currentRow(currColumn));
}
break;
case "Decimal":
if (string.IsNullOrEmpty(currentRow(currColumn))) {
dr.Item(currColumn) = 0;
} else {
dr.Item(currColumn) = Convert.ToDecimal(currentRow(currColumn));
}
break;
case "DateTime":
if (string.IsNullOrEmpty(currentRow(currColumn))) {
dr.Item(currColumn) = "";
} else {
dr.Item(currColumn) = Convert.ToDateTime(currentRow(currColumn));
}
break;
}
}
CSVTable.Rows.Add(dr);
} catch (Microsoft.VisualBasic.FileIO.MalformedLineException ex) {
Interaction.MsgBox("Line " + ex.Message + "is not valid." + Constants.vbCrLf + "Terminating Read Operation.");
reader.Close();
reader.Dispose();
return false;
} finally {
dr = null;
}
}
reader.Close();
reader.Dispose();
return true;
}
}
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Excel Import Error in ASP.net

I am trying to import an excel to database from asp.net website through dataset.
Here is my first part.
int xlColCount = 1;
wb = app.Workbooks.Open(FilePath, 0, false, 5, "", "", true, Ex.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
ws = (Ex.Worksheet)wb.ActiveSheet;
xlColCount = ws.Columns.Count;
xlColCount = ws.UsedRange.Columns.Count;
ws.Columns.ClearFormats();
xlColCount = ws.UsedRange.Columns.Count;
//creating datacolumns
for (int i = 0; i < xlColCount; i++)
{
try
{
DSname.Tables[0].Columns.Add(((Ex.Range)ws.Cells[1,strColArr[i]]).Value2.ToString().Trim());
}
catch(Exception ex)
{
//error occured
}
}
First I am creating the column name based on the excel heading into dataset column. here xlColCount=198 (total no.of columns from the excel template and all are filled ) but when reaching 172th column (i=172) it is giving index out of range error.
What could be the reason? I need to create a dataset with column names from all excel column names.

Check your strColArr[i] array capacity..may be initialized with 172 or less in size.

May be you will have better results (and performance) with ADO.NET and System.Data.OleDb :
string filePath = #"C:\Workbook1.xls";
string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties=\"Excel 8.0\";";
OleDbConnection connection = new OleDbConnection(connectionString);
string cmdText = "SELECT * FROM [Sheet1$]";
OleDbCommand command = new OleDbCommand(cmdText, connection);
command.Connection.Open();
OleDbDataReader reader = command.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
Console.WriteLine("{0}\t{1}", reader[0].ToString(), reader[1].ToString());
}
}

string filePath = "":
OleDbCommand cmd = new OleDbCommand(); ;
OleDbDataAdapter oleda = new OleDbDataAdapter();
DataSet ds = new DataSet();
DataTable dt = new DataTable();
UserBase loginUser = (UserBase)Session["LoggedUser"];
SearchFilter filter = new SearchFilter();
string action = "ExportDocumentType";
filter.DocumentTypeID = Convert.ToInt32(cmbDocumentType.SelectedValue);
filter.DepartmentID = Convert.ToInt32(cmbDepartment.SelectedValue);
try
{
Logger.Trace("Started Extracting Soft Data", Session["LoggedUserId"].ToString());
// need to pass relative path after deploying on server
oledbConn = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
filePath + ";Extended Properties='Excel 12.0;';");
try
{
oledbConn.Open();
}
catch
{
string con = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + filePath + ";" + "Extended Properties=Excel 8.0;HDR=Yes;IMEX=1";
oledbConn = new OleDbConnection(con);
oledbConn.Open();
}
// Get the data table containg the schema guid.
dt = oledbConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
throw new Exception(" No sheets available!");
}
String[] excelSheets = new String[dt.Rows.Count];
int i = 0;
// Add the sheet name to the string array.
foreach (DataRow row in dt.Rows)
{
excelSheets[i] = row["TABLE_NAME"].ToString();
i++;
}
cmd.Connection = oledbConn;
cmd.CommandType = CommandType.Text;
// Get column names of selected document type
string SelectCommand = getIndexFieldsList();
SelectCommand = "SELECT " + SelectCommand + " FROM [" + excelSheets[0] + "]";
cmd.CommandText = SelectCommand;
oleda = new OleDbDataAdapter(cmd);
try
{
oleda.Fill(ds);
}
catch
{
throw new Exception("Selected file is not matching to " + cmbDocumentType.SelectedItem.Text + ".");//Bug Wrtier DMS ENHSMT 1-1012 M
}
string strXml = string.Empty;
if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
{
// note: Do ur code here.. i prefer to create a insert satement from here using looping it out
}
else
{
throw new Exception(" No data available in uploaded file!");//Bug Wrtier DMS ENHSMT 1-1012 M
}
}
catch (Exception ex)
{
Logger.Trace("Exception:" + ex.Message, Session["LoggedUserId"].ToString());
throw new Exception(ex.Message.ToString());
}
finally
{
// Clean up.
if (oledbConn != null)
{
oledbConn.Close();
oledbConn.Dispose();
}
if (dt != null)
{
dt.Dispose();
}
if (ds != null)
{
ds.Dispose();
}
}
}

How to replace all apostrophes in an excel sheet with double apostrophes

I have to export excel sheet to ms sql database table. For that I used oledb connection . It works well. But any cell value containing apostrophes(example : cell 1 value is - divya's ) shows an error “Unclosed quotation mark after the character string” .
I found that To insert single quote or apostrophe data in database we need to use two consecutive single quotes or apostrophes in data. How can it make possible in excel sheet ?
protected void btnSend_Click(object sender, ImageClickEventArgs e) //upload QB
{
SqlConnection con = obj.getcon();
string filename = Path.GetFileName(fileuploadExcel.FileName);
int fileSize = fileuploadExcel.PostedFile.ContentLength;
if ((Path.GetExtension(filename) == ".xlsx" || Path.GetExtension(filename) == ".xls") && (fileSize <= (1.049e+6)))
{
string excel_file = "my_excel_file";
var path1 = Server.MapPath("~/personal/" + excel_file + "");
var directory = new DirectoryInfo(path1);
if (directory.Exists == false)
{
directory.Create();
}
fileuploadExcel.SaveAs(path1 + "\\" + filename);
string filepath = path1 + "\\" + filename;
//Create connection string to Excel work book
string excelConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties=Excel 12.0;Persist Security Info=False";
OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);
//Create OleDbCommand to fetch data from Excel
OleDbCommand cmd = new OleDbCommand("Select [Name],[Address] from [mysheet$]", excelConnection);
excelConnection.Open();
OleDbDataReader dReader;
dReader = cmd.ExecuteReader();
string name = "";
string address = "";
while (dReader.Read())
{
name = valid(dReader, 0);
address = valid(dReader, 1);
insertdataintosql(name,address);
}
excelConnection.Close();
}
else
{
Label5.Visible = true;
Label5.Text = " Only Files Having .xlsx or.xls format and less than 1MB size can be uploaded**";
}
}
protected string valid(OleDbDataReader myreader, int stval)
{
//if any columns are found null then they are replaced by zero
object val = myreader[stval];
if (object.ReferenceEquals(val, DBNull.Value))
{
return Convert.ToString(0);
}
else
{
return val.ToString();
}
}
public void insertdataintosql(string name,string address,)
{ SqlConnection conn = obj.getcon();
conn.Open();
string query = "insert into sample_test(name,address) values('" + name + "','"+address+ "')";
SqlCommand cmd = new SqlCommand(query, conn);
cmd.ExecuteNonQuery();
conn.Close();
}

In your valid function:
Instead of
return val.ToString();
use:
return val.ToString().Replace("'","''");

Missing First Columns and First Row in Excel C#

I am trying to read an excel file in excel, but for some reason sometime, the first column is missing and first row is missing from the data.
When I open the file in excel and save it without any changes, the files are read correctly.
Any ideas about how this might happen?
Below is the code i am using to read the file:
string xlConn = "Provider=Microsoft.Jet.OLEDB.4.0;"
+ "Data Source="
+ txt_InputFile.Text
+ ";Extended Properties=Excel 8.0;";
using (OleDbConnection dbConnection = new OleDbConnection(xlConn))
{
dbConnection.Open();
// Get the name of the first worksheet:
DataTable dbSchema = dbConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dbSchema == null || dbSchema.Rows.Count < 1)
{
//"Error: Could not determine the name of the first worksheet."
throw new Exception(Program.lm_GetMethodLanguage(this.GetType().Name, "wp_InputFile_CloseFromNext", 5) );
}
string firstSheetName = dbSchema.Rows[0]["TABLE_NAME"].ToString();
using (
OleDbDataAdapter dbCommand = new OleDbDataAdapter("SELECT * FROM [" + firstSheetName + "]",
dbConnection))
{
using (DataSet myDataSet = new DataSet())
{
dbCommand.Fill(myDataSet);
inputData = myDataSet.Tables[0];
}
}
}

Use this.This will retrieve all the sheets in excel sheet.
private String[] GetExcelSheetNames(string excelFile)
{
try
{
excelConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + ""yoursourcepath"+ ";Extended Properties=Excel 12.0;Persist Security Info=False";
excelConnection = new OleDbConnection(excelConnectionString);
excelConnection.Open();
dt = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
return null;
}
excelSheets = new String[dt.Rows.Count];
int i = 0;
foreach (DataRow row in dt.Rows)
{
excelSheets[i] = row["TABLE_NAME"].ToString();
i++;
}
return excelSheets;
}
catch (Exception ex)
{
return null;
}
finally
{
if (excelConnection != null)
{
excelConnection.Close();
excelConnection.Dispose();
}
if (dt != null)
{
dt.Dispose();
}
}
}

How to take Excel file uploaded from website and import data to SQL Server programmatically?

I'm trying to do something like this:
public void ImportClick(object sender, EventArgs e) //the button used after selecting the spreadsheet file
{
if (fileUpload.HasFile) //ASP.Net FileUpload control
{
if (fileUpload.FileName.EndsWith(".xls", StringComparison.OrdinalIgnoreCase) || fileUpload.FileName.EndsWith(".xlsx", StringComparison.OrdinalIgnoreCase))
{
Excel sheet = new Excel(fileUpload.Open()); //not sure how to do this part
using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["our_database"].ConnectionString))
{
using (SqlCommand command = new SqlCommand("INSERT INTO table_name SELECT * FROM " + sheet, connection))
{
connection.Open();
command.ExecuteQuery(); //Intellisense only has "ExecuteNonQuery()" method, but that's for T-SQL
connection.Close();
}
}
}
else
{
error.Text = "File must be either *.xls or *.xlsx";
error.Visible = true;
}
}
else
{
error.Text = "No file was selected";
error.Visible = true;
}
}
There are a lot of classes and interfaces in the Microsoft.Office.Interop.Excel namespace, and I don't know which one to use.
I know making the Excel object, along with the SQL command, probably won't be as easy as what I have here, but those are the two things I need help with.
Any suggestions/advice would be greatly appreciated!

I would suggest using Microsoft Jet Engine.
private static void UploadExcelToDB(string p)
{
try
{
using (SqlConnection conn = new SqlConnection(DBConnString))
{
conn.Open();
if (conn.State == ConnectionState.Open)
{
Log("Opened connection to DB");
}
SqlBulkCopy sbk = new SqlBulkCopy(conn);
sbk.BulkCopyTimeout = 600;
sbk.DestinationTableName = DbTableName;
DataTable excelDT = new DataTable();
OleDbConnection excelConn = new OleDbConnection(ExcelConnString.Replace("xFILEx",p));
excelConn.Open();
if (excelConn.State == ConnectionState.Open)
{
Log("Opened connection to Excel");
}
OleDbCommand cmdExcel = new OleDbCommand();
OleDbDataAdapter oda = new OleDbDataAdapter();
cmdExcel.CommandText = "SELECT * FROM ["+ExcelTableName+"]";
cmdExcel.Connection = excelConn;
oda.SelectCommand = cmdExcel;
oda.Fill(excelDT);
if (excelDT != null)
{
Log("Fetched records to local Data Table");
}
excelConn.Close();
SqlCommand sqlCmd = new SqlCommand("TRUNCATE TABLE ICN_NUGGET_REPORT_RAW",conn);
sqlCmd.CommandType = CommandType.Text;
Log("Trying to clear current data in table");
int i = sqlCmd.ExecuteNonQuery();
Log("Table flushed");
Log("Trying write new data to server");
sbk.WriteToServer(excelDT);
Log("Written to server");
conn.Close();
}
}
catch (Exception ex)
{
Log("ERROR: " + ex.Message);
SendErrorReportMail();
}
finally
{
#if (DEBUG)
{
}
#else
{
string archive_file = ArchiveDir+"\\" + DateTime.Now.ToString("yyyyMMdd-Hmmss") + ".xlsx";
File.Move(p, archive_file);
Log("Moved processed file to archive dir");
Log("Starting archive process...");
}
#endif
}
}
This is how ExcelConnString looks like:
public static string ExcelConnString { get { return "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=xFILEx;Extended Properties=\"Excel 12.0;HDR=YES\";";} }
HDR=YES - this means that if you have column names in spreadsheet it will be treated as target table column names for matching each other.

I am thinking of creating an instance of excel.application class and writing codes to loop through the cells. And using SQL insert query to copy the rows one by one to the SQL table. I'm still working it out anyway and would paste the code when i'm done.