In my code has an issue but I can't see what issue in this. Column names are same word by word and it is working, If I use 1 column in csv file but when I try out more then 2-3 column fields it is giving the error below. I have checked read lots of article so I can't fix the error. What can be happen with is this lines. DB already was created with similar fields.
private void DBaktar()
{
string SQLServerConnectionString = "Server =.\\SQLEXPRESS; Database = Qiti; User Id = sa; Password = 7731231xx!!;";
string CSVpath = #"D:\FTP\"; // CSV file Path
string CSVFileConnectionString = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};;Extended Properties=\"text;HDR=Yes;FMT=Delimited\";", CSVpath);
var AllFiles = new DirectoryInfo(CSVpath).GetFiles("*.CSV");
string File_Name = string.Empty;
foreach (var file in AllFiles)
{
try
{
DataTable dt = new DataTable();
using (OleDbConnection con = new OleDbConnection(CSVFileConnectionString))
{
con.Open();
var csvQuery = string.Format("select * from [{0}]", file.Name);
using (OleDbDataAdapter da = new OleDbDataAdapter(csvQuery, con))
{
da.Fill(dt);
}
}
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(SQLServerConnectionString))
{
bulkCopy.ColumnMappings.Add("LKod", "LKod");
bulkCopy.ColumnMappings.Add("info", "info");
bulkCopy.ColumnMappings.Add("Codex", "Codex");
bulkCopy.ColumnMappings.Add("LthNo", "LthNo");
bulkCopy.ColumnMappings.Add("Datein", "Datein");
bulkCopy.DestinationTableName = "U_Tik";
bulkCopy.BatchSize = 0;
bulkCopy.EnableStreaming = true;
bulkCopy.WriteToServer(dt);
bulkCopy.Close();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
Error exception;
The given ColumnName 'LKod' does not match up with any column in data
source.
ex.StackTrace;
at
System.Data.SqlClient.SqlBulkCopy.WriteRowSourceToServerCommon(Int32
columnCount) at
System.Data.SqlClient.SqlBulkCopy.WriteRowSourceToServerAsync(Int32
columnCount, CancellationToken ctoken) at
System.Data.SqlClient.SqlBulkCopy.WriteToServer(DataTable table,
DataRowState rowState) at
System.Data.SqlClient.SqlBulkCopy.WriteToServer(DataTable table)
Some information can be found here: https://sqlbulkcopy-tutorial.net/columnmapping-does-not-match
Cause
You didn't provide any ColumnMappings, and there is more column in the source than in the destination.
You provided an invalid column name for the source.
You provided an invalid column name for the destination.
Solution
ENSURE to provide a ColumnMappings
ENSURE all values for source column name are valid and case sensitive.
ENSURE all values for destination column name are valid and case sensitive.
MAKE the source case insensitive
I have found a solution and working 100% true.. The link below, I hope become a path who need that.
https://johnnycode.com/2013/08/19/using-c-sharp-sqlbulkcopy-to-import-csv-data-sql-server/
Related
I've created a custom Magic command with the intention of generating a spark query programatically. Here's the relevant part of my class that implements the MagicCommandFunctionality:
MagicCommandOutcomeItem execute(MagicCommandExecutionParam magicCommandExecutionParam) {
// get the string that was entered:
String input = magicCommandExecutionParam.command.substring(MAGIC.length())
// use the input to generate a query
String generatedQuery = Interpreter.interpret(input)
MIMEContainer result = Text(generatedQuery);
return new MagicCommandOutput(MagicCommandOutcomeItem.Status.OK, result.getData().toString());
}
This works splendidly. It returns the command that I generated. (As text)
My question is -- how do I coerce the notebook into evaluating that value in the cell? My guess is that a SimpleEvaluationObject and TryResult are involved, but I can't find any examples of their use
Rather than creating the MagicCommandOutput I probably want the Kernel to create one for me. I see that the KernelMagicCommand has an execute method that would do that. Anyone have any ideas?
Okay, I found one way to do it. Here's my solution:
You can ask the current kernelManager for the kernel you're interested in,
then call PythonEntryPoint.evaluate. It seems to do the job!
#Override
MagicCommandOutcomeItem execute(MagicCommandExecutionParam magicCommandExecutionParam) {
String input = magicCommandExecutionParam.command.substring(MAGIC.length() + 1)
// this is the Scala code I want to evaluate:
String codeToExecute = <your code here>
KernelFunctionality kernel = KernelManager.get()
PythonEntryPoint pep = kernel.getPythonEntryPoint(SCALA_KERNEL)
pep.evaluate(codeToExecute)
pep.getShellMsg()
List<Message> messages = new ArrayList<>()
//until there are messages on iopub channel available collect them into response
while (true) {
String iopubMsg = pep.getIopubMsg()
if (iopubMsg == "null") break
try {
Message msg = parseMessage(iopubMsg) //(I didn't show this part)
messages.add(msg)
String commId = (String) msg.getContent().get("comm_id")
if (commId != null) {
kernel.addCommIdManagerMapping(commId, SCALA_KERNEL)
}
} catch (IOException e) {
log.error("There was an error: ${e.getMessage()}")
return new MagicKernelResponse(MagicCommandOutcomeItem.Status.ERROR, messages)
}
}
return new MagicKernelResponse(MagicCommandOutcomeItem.Status.OK, messages)
}
I have some word templates(maybe thousands). Each template has merge fields which will be filled from database. I don`t like writing separate code for every template and then build the application and deploy it whenever a template is changed or a field on the template is added!
Instead, I'm trying to define all merge fields in a separate xml file and for each field I want to write the "query" which will be called when needed. EX:
mergefield1 will call query "Case.Parties.FirstOrDefault.NameEn"
mergefield2 will call query "Case.CaseNumber"
mergefield3 will call query "Case.Documents.FirstOrDefault.DocumentContent.DocumentType"
Etc,
So, for a particular template I scan its merge fields, and for each merge field I take it`s "query definition" and make that request to database using EntityFramework and LINQ. Ex. it works for these queries: "TimeSlots.FirstOrDefault.StartDateTime" or
"Case.CaseNumber"
This will be an engine which will generate word documents and fill it with merge fields from xml. In addition, it will work for any new template or new merge field.
Now, I have worked a version using reflection.
public string GetColumnValueByObjectByName(Expression<Func<TEntity, bool>> filter = null, string objectName = "", string dllName = "", string objectID = "", string propertyName = "")
{
string objectDllName = objectName + ", " + dllName;
Type type = Type.GetType(objectDllName);
Guid oID = new Guid(objectID);
dynamic Entity = context.Set(type).Find(oID); // get Object by Type and ObjectID
string value = ""; //the value which will be filled with data from database
IEnumerable<string> linqMethods = typeof(System.Linq.Enumerable).GetMethods(BindingFlags.Static | BindingFlags.Public).Select(s => s.Name).ToList(); //get all linq methods and save them as list of strings
if (propertyName.Contains('.'))
{
string[] properies = propertyName.Split('.');
dynamic object1 = Entity;
IEnumerable<dynamic> Child = new List<dynamic>();
for (int i = 0; i < properies.Length; i++)
{
if (i < properies.Length - 1 && linqMethods.Contains(properies[i + 1]))
{
Child = type.GetProperty(properies[i]).GetValue(object1, null);
}
else if (linqMethods.Contains(properies[i]))
{
object1 = Child.Cast<object>().FirstOrDefault(); //for now works only with FirstOrDefault - Later it will be changed to work with ToList or other linq methods
type = object1.GetType();
}
else
{
if (linqMethods.Contains(properies[i]))
{
object1 = type.GetProperty(properies[i + 1]).GetValue(object1, null);
}
else
{
object1 = type.GetProperty(properies[i]).GetValue(object1, null);
}
type = object1.GetType();
}
}
value = object1.ToString(); //.StartDateTime.ToString();
}
return value;
}
I`m not sure if this is the best approach. Does anyone have a better suggestion, or maybe someone has already done something like this?
To shorten it: The idea is to make generic linq queries to database from a string like: "Case.Parties.FirstOrDefault.NameEn".
Your approach is very good. I have no doubt that it already works.
Another approach is using Expression Tree like #Egorikas have suggested.
Disclaimer: I'm the owner of the project Eval-Expression.NET
In short, this library allows you to evaluate almost any C# code at runtime (What you exactly want to do).
I would suggest you use my library instead. To keep the code:
More readable
Easier to support
Add some flexibility
Example
public string GetColumnValueByObjectByName(Expression<Func<TEntity, bool>> filter = null, string objectName = "", string dllName = "", string objectID = "", string propertyName = "")
{
string objectDllName = objectName + ", " + dllName;
Type type = Type.GetType(objectDllName);
Guid oID = new Guid(objectID);
object Entity = context.Set(type).Find(oID); // get Object by Type and ObjectID
var value = Eval.Execute("x." + propertyName, new { x = entity });
return value.ToString();
}
The library also allow you to use dynamic string with IQueryable
Wiki: LINQ-Dynamic
I'm trying to save a "history" I'm building after you sent a command from a line, so every time you press Enter the commands goes to the jTextPane with a line separator... However when I save the file it doesn't seem to get the line separator. Example, my jTextPane has something like:
Create database user
use database user
show tables from database
Instead of saving the workspace just like that, it gives me this:
Create database useruse database usershow tables from database
What should I do? Here's my code
String ar;
String TEXTO = jTextPane1.getText() + System.lineSeparator();
FileFilter ft = new FileNameExtensionFilter("Text Files", ".txt");
FC.setFileFilter(ft);
int returnVal = FC.showSaveDialog(this);
if (returnVal == javax.swing.JFileChooser.APPROVE_OPTION) {
java.io.File saved_file = FC.getSelectedFile();
String file_name = saved_file.toString();
File archivo;
ar = "" + file_name + ".txt";
archivo = new File(ar);
try {
if (saved_file != null) {
try (FileWriter GUARDADO = new FileWriter(ar)) {
GUARDADO.write(TEXTO);
}
}
} catch (IOException exp) {
System.out.println(exp);
}
}
You need to use :
jTextPane1.getDocument().getText(0,jTextPane1.getDocument().getLength());
The issue is that you need to use /n instead of System.lineSeparator. The JTextPane behavior doesn't depends on the System.
The System.Author Windows property is a multiple value string. Windows Search returns this value as an array of strings in a DataColumn. (The column's data-type is string[] or String().) When I call the WriteXML method on the resulting data-table, I get the following InvalidOperationException exception.
Is there a way to specify the data-table's xml-serializer to use for specific columns or specific data-types?
Basically, how can I make WriteXML work with this data-table?
System.InvalidOperationException:
Type System.String[] does not
implement IXmlSerializable interface
therefore can not proceed with
serialization.
You could easily copy your DataTable changing the offending Authors column to a String and joing the string[] data with a proper delimiter like "|" or "; ".
DataTable xmlFriendlyTable = oldTable.Clone();
xmlFriendlyTable.Columns["Author"].DataType = typeof(String);
xmlFriendlyTable.Columns["Author"].ColumnMapping = MappingType.Element;
foreach(var row in oldTable.Rows) {
object[] rowData = row.ItemArray;
object[] cpyRowData = new object[rowData.Length];
for(int i = 0; i<rowData.Length; i++) {
if(rowData[i] != null && rowData[i].GetType() == typeof(String[])) {
cpyRowData[i] = String.Join("; ", (rowData[i] as String[]));
} else {
cpyRowData[i] = rowData[i];
}
xmlFriendlyTable.Rows.Add(cpyRowData);
}
}
xmlFriendlyTable.WriteXml( ... );
NOTE Wrote the above in the web browser, so there may be syntax errors.
I'm attempting to parse SQL using the TSql100Parser provided by microsoft. Right now I'm having a little trouble using it the way it seems to be intended to be used. Also, the lack of documentation doesn't help. (example: http://msdn.microsoft.com/en-us/library/microsoft.data.schema.scriptdom.sql.tsql100parser.aspx )
When I run a simple SELECT statement through the parser it returns a collection of TSqlStatements which contains a SELECT statement.
Trouble is, the TSqlSelect statement doesn't contain attributes such as a WHERE clause, even though the clause is implemented as a class. http://msdn.microsoft.com/en-us/library/microsoft.data.schema.scriptdom.sql.whereclause.aspx
The parser does recognise the WHERE clause as such, looking at the token stream.
So, my question is, am I using the parser correctly? Right now the token stream seems to be the most useful feature of the parser...
My Test project:
public static void Main(string[] args)
{
var parser = new TSql100Parser(false);
IList<ParseError> Errors;
IScriptFragment result = parser.Parse(
new StringReader("Select col from T1 where 1 = 1 group by 1;" +
"select col2 from T2;" +
"select col1 from tbl1 where id in (select id from tbl);"),
out Errors);
var Script = result as TSqlScript;
foreach (var ts in Script.Batches)
{
Console.WriteLine("new batch");
foreach (var st in ts.Statements)
{
IterateStatement(st);
}
}
}
static void IterateStatement(TSqlStatement statement)
{
Console.WriteLine("New Statement");
if (statement is SelectStatement)
{
PrintStatement(sstmnt);
}
}
Yes, you are using the parser correctly.
As Damien_The_Unbeliever points out, within the SelectStatement there is a QueryExpression property which will be a QuerySpecification object for your third select statement (with the WHERE clause).
This represents the 'real' SELECT bit of the query (whereas the outer SelectStatement object you are looking at has just got the 'WITH' clause (for CTEs), 'FOR' clause (for XML), 'ORDER BY' and other bits)
The QuerySpecification object is the object with the FromClauses, WhereClause, GroupByClause etc.
So you can get to your WHERE Clause by using:
((QuerySpecification)((SelectStatement)statement).QueryExpression).WhereClause
which has a SearchCondition property etc. etc.
Quick glance around would indicate that it contains a QueryExpression, which could be a QuerySpecification, which does have the Where clause attached to it.
if someone lands here and wants to know how to get the whole elements of a select statement the following code explain that:
QuerySpecification spec = (QuerySpecification)(((SelectStatement)st).QueryExpression);
StringBuilder sb = new StringBuilder();
sb.AppendLine("Select Elements");
foreach (var elm in spec.SelectElements)
sb.Append(((Identifier)((Column)((SelectColumn)elm).Expression).Identifiers[0]).Value);
sb.AppendLine();
sb.AppendLine("From Elements");
foreach (var elm in spec.FromClauses)
sb.Append(((SchemaObjectTableSource)elm).SchemaObject.BaseIdentifier.Value);
sb.AppendLine();
sb.AppendLine("Where Elements");
BinaryExpression binaryexp = (BinaryExpression)spec.WhereClause.SearchCondition;
sb.Append("operator is " + binaryexp.BinaryExpressionType);
if (binaryexp.FirstExpression is Column)
sb.Append(" First exp is " + ((Identifier)((Column)binaryexp.FirstExpression).Identifiers[0]).Value);
if (binaryexp.SecondExpression is Literal)
sb.Append(" Second exp is " + ((Literal)binaryexp.SecondExpression).Value);
I had to split a SELECT statement into pieces. My goal was to COUNT how many record a query will return. My first solution was to build a sub query such as
SELECT COUNT(*) FROM (select id, name from T where cat='A' order by id) as QUERY
The problem was that in this case the order clause raises the error "The ORDER BY clause is not valid in views, inline functions, derived tables, sub-queries, and common table expressions, unless TOP or FOR XML is also specified"
So I built a parser that split a SELECT statment into fragments using the TSql100Parser class.
using Microsoft.Data.Schema.ScriptDom.Sql;
using Microsoft.Data.Schema.ScriptDom;
using System.IO;
...
public class SelectParser
{
public string Parse(string sqlSelect, out string fields, out string from, out string groupby, out string where, out string having, out string orderby)
{
TSql100Parser parser = new TSql100Parser(false);
TextReader rd = new StringReader(sqlSelect);
IList<ParseError> errors;
var fragments = parser.Parse(rd, out errors);
fields = string.Empty;
from = string.Empty;
groupby = string.Empty;
where = string.Empty;
orderby = string.Empty;
having = string.Empty;
if (errors.Count > 0)
{
var retMessage = string.Empty;
foreach (var error in errors)
{
retMessage += error.Identifier + " - " + error.Message + " - position: " + error.Offset + "; ";
}
return retMessage;
}
try
{
// Extract the query assuming it is a SelectStatement
var query = ((fragments as TSqlScript).Batches[0].Statements[0] as SelectStatement).QueryExpression;
// Constructs the From clause with the optional joins
from = (query as QuerySpecification).FromClauses[0].GetString();
// Extract the where clause
where = (query as QuerySpecification).WhereClause.GetString();
// Get the field list
var fieldList = new List<string>();
foreach (var f in (query as QuerySpecification).SelectElements)
fieldList.Add((f as SelectColumn).GetString());
fields = string.Join(", ", fieldList.ToArray());
// Get The group by clause
groupby = (query as QuerySpecification).GroupByClause.GetString();
// Get the having clause of the query
having = (query as QuerySpecification).HavingClause.GetString();
// Get the order by clause
orderby = ((fragments as TSqlScript).Batches[0].Statements[0] as SelectStatement).OrderByClause.GetString();
}
catch (Exception ex)
{
return ex.ToString();
}
return string.Empty;
}
}
public static class Extension
{
/// <summary>
/// Get a string representing the SQL source fragment
/// </summary>
/// <param name="statement">The SQL Statement to get the string from, can be any derived class</param>
/// <returns>The SQL that represents the object</returns>
public static string GetString(this TSqlFragment statement)
{
string s = string.Empty;
if (statement == null) return string.Empty;
for (int i = statement.FirstTokenIndex; i <= statement.LastTokenIndex; i++)
{
s += statement.ScriptTokenStream[i].Text;
}
return s;
}
}
And to use this class simply:
string fields, from, groupby, where, having, orderby;
SelectParser selectParser = new SelectParser();
var retMessage = selectParser.Parse("SELECT * FROM T where cat='A' Order by Id desc",
out fields, out from, out groupby, out where, out having, out orderby);