Get the Row values from a excel based on the column Value

Get the Row values from a excel based on the column Value - c#

I am trying to a get the Row values from a excel sheet, based on the column Value.
e.g. I have CutsomerID as lets say 5 , so I want First name 5, last Name 5 and Address 5
I am converting whole excel sheet into DataTable and then trying to read on each DataRow, when I get CustomerID as 5, I copy all the values and break from the loop
Here is my code and it is working fine as well, but I was wondering is there any way to optimise it.
Here is my Code.
public ExcelData GetDataByCustomerID(String excelFilePath, String customerID)
{
OleDbConnectionStringBuilder connectionStringBuilder = new OleDbConnectionStringBuilder();
connectionStringBuilder.Provider = "Microsoft.ACE.OLEDB.12.0";
connectionStringBuilder.DataSource = excelFilePath;
connectionStringBuilder.Add("Mode", "Read");
const string extendedProperties = "Excel 12.0;IMEX=1;HDR=YES";
connectionStringBuilder.Add("Extended Properties", extendedProperties);
String connectionString = connectionStringBuilder.ToString();
// Create connection object by using the preceding connection string.
using( var objConn = new OleDbConnection(connectionString))
{
objConn.Open();
// Get the data table contaning the schema guid.
DataTable excelSheetsDataTable = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (excelSheetsDataTable == null)
return null;
// get all the tables in the Sheet
List<String> excelSheets = (from DataRow row in excelSheetsDataTable.Rows select row["TABLE_NAME"].ToString()).ToList();
// Our data is on First sheet only
OleDbCommand _oleCmdSelect = new OleDbCommand(#"SELECT * FROM [" + excelSheets[0] + "]", objConn);
OleDbDataAdapter oleAdapter = new OleDbDataAdapter();
oleAdapter.SelectCommand = _oleCmdSelect;
DataTable newDataTable = new DataTable();
oleAdapter.FillSchema(newDataTable, SchemaType.Source);
oleAdapter.Fill(newDataTable);
if (newDataTable.Columns.Contains("CustomerID"))
{
foreach (DataRow rowValue in newTB.Rows)
{
if ((string) rowValue["CustomerID"] == customerID)
{
var data = new ExcelData
{
customerFirstName = rowValue["Customer_First_ Name"].ToString(),
customerLastName = rowValue["Customer_Last_Name"].ToString(),
customerAddress = rowValue["Customer_Address"].ToString(),
};
return data;
}
}
String message = String.Format("The CustomerID {0} not found in Excel file {1}", customerID, excelFilePath);
MessageBox.Show(message);
}
else
{
String message = String.Format("The Column CustomerID not found in Excel file {0}", excelFilePath);
MessageBox.Show(message);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return null;
}
public class ExcelData
{
public String customerID;
public String customerFirstName;
public String customerLastName;
public String customerAddress;
}

Change your select query to like below -
#"SELECT * FROM [" + excelSheets[0] + "] WHERE CustomerID=<your_value>"

Courtesy msdn web site:
Link: MSDN
DataTable dt;
private void button1_Click(object sender, EventArgs e)
{
try
{
openFileDialog1.ShowDialog();
string connectionString = string.Format("Provider = Microsoft.Jet.OLEDB.4.0;Data Source ={0};Extended Properties = Excel 8.0;", this.openFileDialog1.FileName);
var con = new OleDbConnection(connectionString);
var cmd = new OleDbCommand("select * from [sheet1$] where [MRN#]=#c", con);
cmd.Parameters.Add("#c", "33264");
con.Open();
var dr = cmd.ExecuteReader();
if (dr.HasRows)
{
dt = new DataTable();
dt.Load(dr);
}
dr.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
DataGridView dv = new DataGridView();
this.Controls.Add(dv);
dv.DataSource = dt;
}
}
EDIT:
As per your code you should try the below lines of code:
OleDbCommand _oleCmdSelect = new OleDbCommand(#"SELECT * FROM [" + excelSheets[0] + "]" + " Where [CustomerID#] = #custID" , objConn);
_oleCmdSelect.Parameters.Add("#custID", customerID);
OleDbDataAdapter oleAdapter = new OleDbDataAdapter();
oleAdapter.SelectCommand = _oleCmdSelect;

Related

Importing data from excelsheet file into the mysql database C#

I have the following lines of code:
protected void btnUpload_Click(object sender, EventArgs e)
{
MySqlTransaction transaction;
string ex_id = "";
string file_name = Path.GetFileName(FileUpload1.FileName);
string Excel_path = Server.MapPath("~/Excel/" + file_name);
DataTable dtExceldata = new DataTable();//just added
FileUpload1.SaveAs(Excel_path);
OleDbConnection my_con = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Excel_path + ";Extended Properties=Excel 8.0;Persist Security Info=False");
my_con.Open();
OleDbDataAdapter da = new OleDbDataAdapter("select * from [Sheet1$]", my_con);
da.Fill(dtExceldata);
if (dtExceldata.Rows.Count > 0)
{
//foreach (DataRow row in dtExceldata.Rows)
for (int i = 0; i <= dtExceldata.Rows.Count - 1; i++)
{
string ex_dir = dtExceldata.Rows[i]["website_a"].ToString();
//string ex_dir = row["website_a"].ToString();
string ex_email = dtExceldata.Rows[i]["email_id"].ToString();
// string ex_email = row["email_id"].ToString();
string ex_email1 = dtExceldata.Rows[i]["email_id2"].ToString();
//string ex_email1 = row["email_id2"].ToString();
string ex_email2 = dtExceldata.Rows[i]["email_id3"].ToString();
//string ex_email2 = row["email_id3"].ToString();
string ex_company = dtExceldata.Rows[i]["company"].ToString();
//string ex_company = row["company"].ToString();
string ex_contact = dtExceldata.Rows[i]["contact_name"].ToString();
//string ex_contact = row["contact_name"].ToString();
string ex_proposal = dtExceldata.Rows[i]["proposal_status"].ToString();
// string ex_proposal = row["proposal_status"].ToString();
string ex_reason = dtExceldata.Rows[i]["reason"].ToString();
//string ex_reason = row["reason"].ToString();
int chk = 0;
int type = 0;
int dup = 0;
int dir = 0;
if (ddlwebsites.SelectedIndex != 0)
{
dir = Convert.ToInt32(ddlwebsites.SelectedValue);
if (dir == 8)
{
type = 1;
}
}
foreach (ListItem lstAssign in ddlevents.Items)
{
if (lstAssign.Selected == true)
{
chk = 1;
}
}
if (type == 1 && chk == 0)
{
evyerror.Text = "Please Select the Event!!";
return;
}
else
{
string querycomp = "", compID = "";
querycomp = "Select * from barter_company where website like '%' '" + ex_dir + "' '%'";
string connStr = ConfigurationManager.ConnectionStrings["BarterConnectionString"].ToString();
connect = new MySqlConnection(connStr);
connect.Open();
transaction = connect.BeginTransaction();
try
{
ClassDtBaseConnect clsDtResult = new ClassDtBaseConnect();
DataTable dt = clsDtResult.GetDataTable(querycomp);
if (dt.Rows.Count > 0)
{
compID = dt.Rows[0]["comp_id"].ToString();
ViewState["comp_id"] = compID;
if (type == 1)
{
dup = checkforDuplicates(Convert.ToInt32(compID));
if (dup == 1)
{
//Confirm_MP.Show();
// ScriptManager.RegisterStartupScript(this, this.GetType(), "script", "confirmation();", true);
}
}
//return;
}
else
{
string queryStr = "insert into barter_company (comp_name,website) values(?comp,?website)";
MySqlCommand cmd = new MySqlCommand(queryStr, connect, transaction);
cmd.Parameters.AddWithValue("?comp", ex_company);
cmd.Parameters.AddWithValue("?website", ex_dir);
cmd.ExecuteNonQuery();
cmd.CommandText = "Select LAST_INSERT_ID()";
compID = cmd.ExecuteScalar().ToString();
transaction.Commit();
connect.Close();
}
}
catch
{
transaction.Rollback();
}
if (dup == 0)
{
// create a connection string with your sql database
string connStr1 = ConfigurationManager.ConnectionStrings["BarterConnectionString"].ToString();
connect = new MySqlConnection(connStr1);
connect.Open();
DateTime date = new DateTime();
date = DateTime.ParseExact(txtsentdate.Text, "MM/dd/yyyy", null);
string SentDateString = date.ToString("yyyy/MM/dd");
//DateTime date = new DateTime();
//if (!string.IsNullOrEmpty(ex_date))
// {
//DateTime date = new DateTime();//added by chetan
//ex_date = ex_date.Split(' ')[0];//added by chetan
//date = DateTime.ParseExact(ex_date, "MM/dd/yyyy", null);//added by chetan
//string SentDateString = date.ToString("yyyy/MM/dd");//added by chetan
//DateTime SentDate = Convert.ToDateTime(SentDateString).Date;//added by chetan
//// DateTime date = DateTime.Parse(ex_date);//added by chetan
// }
//date = DateTime.ParseExact(ex_date, "MM/dd/yyyy", System.Globalization.CultureInfo.InvariantCulture);//added by chetan
//date = DateTime.ParseExact(ex_date, "MM/dd/yyyy", null);
// string SentDateString = date.ToString("yyyy/MM/dd");
transaction = connect.BeginTransaction();
try
{
string ex_uid = Session["session_barterUser_id"].ToString();
MySqlCommand cmd = new MySqlCommand("insert into barter_proposals(user_id, sent_date, website_a, email_id, email_id2, email_id3, company, contact_name, proposal_status, reason,type) values(?uid,?sentdate,?dir,?email,?email2,?email3,?comp,?cont_name,?pro_status,?reason,?type)", connect);
cmd.Parameters.AddWithValue("?uid", ex_uid);
cmd.Parameters.AddWithValue("?comp", compID);
cmd.Parameters.AddWithValue("?sentdate", SentDateString);
// command.Parameters.AddWithValue("?event", eventname);
cmd.Parameters.AddWithValue("?dir", dir);
// command.Parameters.AddWithValue("?bar_type", ddlbartertype.SelectedValue);
// command.Parameters.AddWithValue("?website_b", txtwebsite.Text);
//cmd.Parameters.AddWithValue("?comp", ex_company);
cmd.Parameters.AddWithValue("?cont_name", ex_contact);
cmd.Parameters.AddWithValue("?email", ex_email);
cmd.Parameters.AddWithValue("?email2", ex_email1);
cmd.Parameters.AddWithValue("?email3", ex_email2);
cmd.Parameters.AddWithValue("?pro_status", ex_proposal);
cmd.Parameters.AddWithValue("?reason", ex_reason);
cmd.Parameters.AddWithValue("?type", type);
// command.Parameters.AddWithValue("?type", type);
cmd.ExecuteNonQuery();
if (type == 1)
{
cmd.CommandText = "Select LAST_INSERT_ID()";
Int64 CurrentProId = Convert.ToInt64(cmd.ExecuteScalar());
int eventAssignID;
string QueryInqEventAssign = "insert into barter_propeventassign(prop_id,event_id) values(?pro_id,?event_id)";
foreach (ListItem lstAssign in ddlevents.Items)
{
if (lstAssign.Selected == true)
{
cmd = new MySqlCommand(QueryInqEventAssign, connect, transaction);
cmd.Parameters.AddWithValue("?pro_id", CurrentProId);
eventAssignID = Convert.ToInt32(lstAssign.Value);
cmd.Parameters.AddWithValue("?event_id", eventAssignID);
cmd.ExecuteNonQuery();
}
}
}//end of if
transaction.Commit();
connect.Close();
Response.Write("<script type=\"text/javascript\">alert('Proposal Added Successfully!!!');</script>");
}//end of try
catch (Exception ex)
{
transaction.Rollback();
Response.Write("<script>alert('There is an Error Ocurred:" + Server.HtmlEncode(ex.Message) + "')</script>");
}
finally
{
connect.Close();
}
}//ifdupzero
}//else
}//for//foreach
}//while //if
// dr.Close();//commented by chetan
my_con.Close();
if (System.IO.File.Exists(Excel_path))
{
System.IO.File.Delete(Excel_path);
}
}
suppose there are 2 entries in the excelsheet file.When trying to import,it is inserting those 2 rows entries into the database table.but the problem is that, the reader does not stop its execution.After reading 2 rows entry,it is reading 3rd row which is blank.i have used dr.close and it keeps on reading the rows entries which is blank.

Instead of checking if there are rows left (dr.Read()) as your loop condition, you could check if the first cell of the row is blank (dr[0].ToString() != String.Empty)
string file_name = Path.GetFileName(FileUpload1.FileName);
string Excel_path = Server.MapPath("~/Excel/" + file_name);
FileUpload1.SaveAs(Excel_path);
OleDbConnection my_con = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Excel_path + ";Extended Properties=Excel 8.0;Persist Security Info=False");
my_con.Open();
OleDbCommand command = new OleDbCommand("select * from [Sheet1$]", my_con);
OleDbDataReader dr = command.ExecuteReader();
dr.Read();
while (dr[0].ToString() != String.Empty)
{
ex_id = dr[0].ToString();
string ex_uid = dr[1].ToString();
//get second row data and assign it ex_name variable
string ex_date = dr[2].ToString();
//get thirdt row data and assign it ex_name variable
string ex_dir = dr[3].ToString();
//get first row data and assign it ex_location variable
string ex_email = dr[4].ToString();
string ex_email1 = dr[5].ToString();
string ex_email2 = dr[6].ToString();
//string ex_company = dr[7].ToString();
string ex_company = dr[7].ToString();
string ex_contact = dr[8].ToString();
string ex_proposal = dr[9].ToString();
string ex_reason = dr[10].ToString();
...............
//Insert operation
...............
dr.Read();
}
dr.close();
my_con.close();
The premise of course is, that the first column is always filled if the rest of the row isn't blank.
If that isn't the case you can also check other columns in the loop condition.

there is various way of doing that
you can load excel data to datatable and then you can for loop for each row with perticular column name like this
string file_name = Path.GetFileName(FileUpload1.FileName);
string Excel_path = Server.MapPath("~/Excel/" + file_name);
DataTable dtExceldata = new DataTable();
FileUpload1.SaveAs(Excel_path);
OleDbConnection my_con = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Excel_path + ";Extended
Properties=Excel 8.0;Persist Security Info=False");
OleDbDataAdapter da = new OleDbDataAdapter("select * from [Sheet1$]", my_con);
da.Fill(dtExceldata);
if(dtExceldata.Rows.Count>0)
{
for (int i = 0; i <= dtExceldata.Rows.Count - 1; i++)
{
//assign value to variable
//like below
//string ex_uid = dtExceldata.Rows[i]["columnName"];
//then insert operation here
}
}

see this excel file
and the datatable in c#
this loop will repeat for only number of row in datatable then also i practically tried this and it only loop for number of row (e.g two times) but i found a bug that if you will enter two row then five blank row then some data it will give you blank value in data table check your excel file there may some blank value as shown in attechment
then also you can skip blank value by checking null value in row like this
for (int i = 0; i <= dtExceldata.Rows.Count - 1; i++)
{
if (!String.IsNullOrEmpty(Convert.ToString(dtExceldata.Rows[i]["fieldvalues"])))
{
//assign value to variable
//like below
//string ex_uid = dtExceldata.Rows[i]["columnName"];
//then insert operation here
}
}

Setting a specific value in a DataTable + writing on DB - C#

The steps of my program are:
Read a CSV file
Read, from a DB, the ID from a specific file name (from step 1)
Create a DataTable with the CSV file
Add a column with the ID from step 2
Write the result on a DB
My problem:
The ID is not being written on the DB
The code has several parts. I will paste the main ones:
Calls:
string id_file = Get_id_file(filenameout, id_costumer);
//MessageBox.Show("the id of the file will be: " + id_file);
DataTable csvFileData = GetDataTabletFromCSVFile(filenameout, id_file);
InsertDataIntoSQLServerUsingSQLBulkCopy(csvFileData, destinytablename);
Reading from the DB:
public static string Get_id_file(string filenameout,string id_id_costumer)
{
var fileName = Path.GetFileNameWithoutExtension(filenameout);
string return_id_file = "";
using (SqlConnection dbConnection = new SqlConnection("XXXXX"))
{
try
{
dbConnection.Open();
SqlDataReader myReader = null;
// Using the DB to find the value
SqlCommand myCommand = new SqlCommand("select ID from TB_FILE_NAMES where path_name='" + fileName + "' and id_program='" + id_id_costumer + "'",
dbConnection);
myReader = myCommand.ExecuteReader();
while (myReader.Read())
{
MessageBox.Show("the ID selected for the file is: " + myReader["ID"].ToString());
return_id_file = (myReader["ID"].ToString());
}
//return_id_file = "9999";
return return_id_file;
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
return ("Error in return_id_file");
}
} // end of using (SqlConnection dbConnection)
}
Part of "GetDataTableFromCSVFile"
On this part, I just wanna set the ID (found in the previous step) to all rows for that specific CSV
// Add a column with the ID of the file
//DataColumn Col =
csvData.Columns.Add("ID_TB_FILE_NAMES", System.Type.GetType("System.String"));
// Set a value for the entire column - ID of the File
//var column2 = csvData.Columns["ID_TB_FILE_NAMES"];
foreach (DataRow row in csvData.Rows)
{
//row.SetField(id_file_name, column2);
row.SetField("ID_TB_FILE_NAMES", id_file_name);
}
return csvData;
} // end of GetDataTabletFromCSVFile
Writing, on the DB, the csvData:
static void InsertDataIntoSQLServerUsingSQLBulkCopy(DataTable csvFileData,string destinytablename)
{
using (SqlConnection dbConnection = new SqlConnection("XXXXX"))
{
dbConnection.Open();
// Clean the destiny table
//string query = "TRUNCATE TABLE " + destinytablename;
//SqlCommand cmd = new SqlCommand(query, dbConnection);
//cmd.ExecuteNonQuery();
using (SqlBulkCopy s = new SqlBulkCopy(dbConnection))
{
s.DestinationTableName = destinytablename;
//foreach (var column in csvFileData.Columns)
// s.ColumnMappings.Add(column.ToString(), column.ToString());
s.WriteToServer(csvFileData);
}
}
} // end of InsertDataIntoSQLServerUsingSQLBulkCopy
I spent 3 days trying to figure out... Any help is welcome.
Thank you.

How do you programmatically check if a spreadsheet has headers in C#

I am creating a winform application where every day, a user will select a xlsx file with the day's shipping information to be merged with our invoicing data.
The challenge I am having is when the user does not download the xlsx file with the specification that the winform data requires. (I wish I could eliminate this step with an API connection but sadly I cannot)
My first step is checking to see if the xlsx file has headers to that my file path is valid
Example
string connString = "provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + *path* + "';Extended Properties='Excel 12.0;HDR=YES;';";
Where path is returned from an OpenFileDialog box
If the file was chosen wasn't downloaded with headers the statement above throws an exception.
If change HDR=YES; to HDR=NO; then I have trouble identifying the columns I need and if the User bothered to include the correct ones.
My code then tries to load the data into a DataTable
private void loadRows()
{
for (int i = 0; i < deliveryTable.Rows.Count; i++)
{
DataRow dr = deliveryTable.Rows[i];
int deliveryId = 0;
bool result = int.TryParse(dr[0].ToString(), out deliveryId);
if (deliveryId > 1 && !Deliveries.ContainsKey(deliveryId))
{
var delivery = new Delivery(deliveryId)
{
SalesOrg = Convert.ToInt32(dr[8]),
SoldTo = Convert.ToInt32(dr[9]),
SoldName = dr[10].ToString(),
ShipTo = Convert.ToInt32(dr[11]),
ShipName = dr[12].ToString(),
};
Which all works only if the columns are in the right place.
If they are not in the right place my thought is to display a message to the user to get the right information
Does anyone have any suggestions?
(Sorry, first time posting a question and still learning to think through it)

I guess you're loading the spreadsheet into a Datatable? Hard to tell with one line of code. I would use the columns collection in the datatable and check to see if all the columns you want are there. Sample code to enumerate the columns below.
private void PrintValues(DataTable table)
{
foreach(DataRow row in table.Rows)
{
foreach(DataColumn column in table.Columns)
{
Console.WriteLine(row[column]);
}
}
}

private void GetExcelSheetForUpload(string PathName, string UploadExcelName)
{
string excelFile = "DateExcel/" + PathName;
OleDbConnection objConn = null;
System.Data.DataTable dt = null;
try
{
DataSet dss = new DataSet();
String connString = "Provider=Microsoft.ACE.OLEDB.12.0;Persist Security Info=True;Extended Properties=Excel 12.0 Xml;Data Source=" + PathName;
objConn = new OleDbConnection(connString);
objConn.Open();
dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
return;
}
String[] excelSheets = new String[dt.Rows.Count];
int i = 0;
foreach (DataRow row in dt.Rows)
{
if (i == 0)
{
excelSheets[i] = row["TABLE_NAME"].ToString();
OleDbCommand cmd = new OleDbCommand("SELECT * FROM [" + excelSheets[i] + "]", objConn);
OleDbDataAdapter oleda = new OleDbDataAdapter();
oleda.SelectCommand = cmd;
oleda.Fill(dss, "TABLE");
}
i++;
}
grdExcel.DataSource = dss.Tables[0].DefaultView;
grdExcel.DataBind();
lblTotalRec.InnerText = Convert.ToString(grdExcel.Rows.Count);
}
catch (Exception ex)
{
ViewState["Fuletypeidlist"] = "0";
grdExcel.DataSource = null;
grdExcel.DataBind();
}
finally
{
if (objConn != null)
{
objConn.Close();
objConn.Dispose();
}
if (dt != null)
{
dt.Dispose();
}
}
}
if (grdExcel.HeaderRow.Cells[0].Text.ToString() == "CODE")
{
GetExcelSheetForEmpl(PathName);
}
else
{
divStatusMsg.Style.Add("display", "");
divStatusMsg.Attributes.Add("class", "alert alert-danger alert-dismissable");
divStatusMsg.InnerText = "ERROR !!... Upload Excel Sheet in header Defined Format ";
}

How create Charts in SubReport in reportviewer

I try create a pdf with a subreport and a chart into subreport, when i create pdf, this error show:
The subreport 'Subreport' could not be found at the specified location
~\ReciboCargoConceptos.rdlc. Please verify that the subreport has been
published and that the name is correct.
.... I add subProcessingEvent
var appDomain = AppDomain.CurrentDomain;
var basePath = appDomain.RelativeSearchPath ?? appDomain.BaseDirectory;
var path = Path.Combine(basePath, "Vistas", "ReciboTres" + ".rdlc");
var reporteLocal = new ReportViewer();
reporteLocal.Reset();
reporteLocal.LocalReport.DataSources.Clear();
if (File.Exists(path))
reporteLocal.LocalReport.ReportPath = path;
var utils = new Utils();
DataTable dt = GetResult();
reporteLocal.LocalReport.DataSources.Add(new ReportDataSource("DSRecibo", dt));
reporteLocal.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(CargoConceptoSubReport);
Method SubreportProcessingReport
void CargoConceptoSubReport(object sender, SubreportProcessingEventArgs e)
{
int idContrato = int.Parse(e.Parameters["IdContrato"].Values[0]);
var dtGrafica= GetGrafica(idContrato);
ReportDataSource datasource= new ReportDataSource("Grafica", dtGrafica);
e.DataSources.Add(datasource);
}
Method GetGrafica
private DataTable GetGrafica(int id)
{
DataTable resultTable = new DataTable();
SqlConnection conn = new SqlConnection("ConnectionString");
try
{
using (conn)
{
string query = #"select top 24 Consumo.ConsumoAgua, PeriodoFacturacion.FechaFinal, PeriodoFacturacion.Id from Consumo inner join PeriodoFacturacion on " +
"PeriodoFacturacion.Id = Consumo.IdPeriodoFacturacion where Consumo.IdContrato = " + id + " order by PeriodoFacturacion.FechaFinal desc";
SqlCommand cmd = new SqlCommand(query, conn);
conn.Open();
SqlDataReader reader = cmd.ExecuteReader();
if (reader.HasRows)
{
resultTable.Load(reader);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
conn.Close();
}
return resultTable;
}
PDF With Error SubReport With Chart:

Simple Database Comparison

I am trying to compare two databases from different dates. I want to load my 'Orders' table from the ending database into a DataTable, then convert that DataTable to a Dictionary<string,int> where string = OrderNumber and int = ClientNumber.
Once I have the Dictionary into memory, I will run my function that goes out to the beginning database and performs a atrOrdersEND.ContainsKey(ordernumber) check. If it is exists nothing will be done, if it does not exist, I want the information of the DataRow to be saved somewhere.
Is this the best way to go about this?
If not, how should I?
static public DataTable getDatabaseInfo(string DB)
{
DB = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DB;
OleDbConnection conn = new OleDbConnection(DB);
string query = "SELECT * FROM ORDERS;";
OleDbCommand cmd = new OleDbCommand(query, conn);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
conn.Open();
try
{
da.Fill(dt);
}
catch (OleDbException ex)
{
}
return dt;
}
static Dictionary<string,int> ToDictionary(DataTable DT)
{ //this doesn't work, I get the 'An item with the same key has already been added' error
var Dict = (from order in DT.AsEnumerable()
select new
{
OrderNumber = order.Field<string>("OrderNumber"),
ClientNumber = order.Field<int>("Client")
}).AsEnumerable()
.ToDictionary(k => k.OrderNumber, v => v.ClientNumber);
return Dict;
}
static public void CheckHistoryBEG(string DB)
{
DB = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DB;
OleDbConnection conn = new OleDbConnection(DB);
string query = "SELECT * " +
"FROM Orders";
OleDbDataAdapter adapter = new OleDbDataAdapter(query, conn);
DataTable dt = new DataTable();
try
{
adapter.Fill(dt);
for (int i = 0; i <= dt.Rows.Count - 1; i++)
{
string ordernumber = dt.Rows[i]["OrderNumber"].ToString();
if (atrOrdersEND.ContainsKey(ordernumber))
{
atrOrdersEND[ordernumber] = atrOrdersEND[ordernumber] + 1;
}
else
{
atrOrdersEND.Add(ordernumber, 1);
}
}
}
catch (OleDbException ex)
{
}
}
public Main()
{
DataTable EndDB_Data = getDatabaseInfo(endDBLocation);
Dictionary<string, int> atrOrdersBEG = ToDictionary(EndDBData);
CheckHistoryBEG(beginningDBLocation);
}

You can avoid writing any C# code by using linked tables in your MS Access database. From one DB you can reference the table in the other database. Then you can do joins or existence queries between the two databases.

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