I've used EPPlus to download my datatable from my website / database to an Excel sheet and the first picture is the result I get. The second picture is what I would like it to be.
Questions:
How do I change the format of my Timestamp to "time"?
Obviously title would still be a string format.
How do I make the width of the columns to match the longest word inside?
So that 80% of the message isn't hidden and you have to drag the column out to read the entire message.
Edit: Completely forgot to add my code...
public ActionResult ExportData()
{
DataTable dataTable = GetData();
using (ExcelPackage package = new ExcelPackage())
{
var ws = package.Workbook.Worksheets.Add("My Sheet");
//true generates headers
ws.Cells["1:1"].Style.Font.Bold = true;
ws.Cells["A1"].LoadFromDataTable(dataTable, true);
ws.Cells[ws.Dimension.Address].AutoFitColumns();
var stream = new MemoryStream();
package.SaveAs(stream);
string fileName = "Log.xlsx";
string contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
stream.Position = 0;
return File(stream, contentType, fileName);
}
}
public DataTable GetData()
{
DataTable dt = new DataTable();
if (ModelState.IsValid)
{
using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["MySqlConnection"].ConnectionString))
{
using (SqlCommand comm = conn.CreateCommand())
{
comm.Parameters.AddWithValue("#val1", Session["myID"]);
comm.Parameters.AddWithValue("#val2", "%" + Session["mySearchString"] + "%");
comm.CommandText = "SELECT * FROM dbo.Log WHERE CustomerId = #val1 AND Message LIKE #val2";
try
{
conn.Open();
dt.Load(comm.ExecuteReader());
}
catch (SqlException e)
{
throw new Exception(e.ToString());
}
}
}
}
return dt;
}
Just need to set the Numberformat.Format string. Like this:
ws.Column(2).Style.Numberformat.Format = "hh:mm:ss";
If you want to customize the actual just there are plenty of resource online like http://www.ozgrid.com/Excel/excel-custom-number-formats.htm. Or you can just open it in excel, set the format to Custom and experiment with the string.
Related
I have the code to execute multiple stored procedures from SQl. However, I am having an issue on how to write the data from the stored procedures into the Excel file. After writing the data into the excel file, I would like to save the Excel workbook. How can I achieve this? Any help is very much appreciated.
This is what I have so far:
public static void ExecuteStoredProcedures()
{
using (SqlConnection connection = new SqlConnection("Data Source=the connection goes here.."))
{
SqlTransaction transaction;
connection.Open();
transaction = connection.BeginTransaction();
try
{
SqlCommand cmdOne = new SqlCommand("exec ", connection);
SqlCommand cmdTwo = new SqlCommand("exec", connection);
SqlCommand cmdThree = new SqlCommand("exec", connection);
cmdOne.ExecuteNonQuery();
cmdTwo.ExecuteNonQuery();
cmdThree.ExecuteNonQuery();
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
connection.Close();
}
}
}
public static void SaveExcelFile()
{
string SheetLocation = ConfigurationManager.AppSettings["SheetLocation"];
if (!System.IO.Directory.Exists(SheetLocation))
{
System.IO.Directory.CreateDirectory(SheetLocation);
}
ExecuteStoredProcedures(); //Should I call the method to load the data that comes from the stored procedures? Or what should I do to write the data into the file?
var newFile = new FileInfo(#"C:\Users\");
using (ExcelPackage xlPackage = new ExcelPackage(newFile))
{
xlPackage.Save();
}
}
Get data from stored procedures in the form of a Dataset or DataTables.
Create worksheet:
using (ExcelPackage xlPackage = new ExcelPackage(newFile))
{
ExcelWorksheet ws = xlPackage.Workbook.Worksheets.Add(AnyName);
}
Loop in Datatable rows and columns like a 2d array and create cells in the worksheet and add data in the created cells:
int rowIndex = 0
foreach (DataRow DataTableRow in dt.Rows)
{
int colIndex = 1;
rowIndex++;
foreach (DataColumn DataTableColumn in dt.Columns)
{
var cell = ws.Cells[rowIndex, colIndex];
cell.Value = DataTableRow[DataTableColumn.ColumnName];
colIndex++;
}
}
I am creating a WinForm Application that reads all the records from a certain column in a textfile. What I now need is a Data Dictionary that I can use to read records from the Database once the applications runs and prior to reading the TextFile. I need to read a specific column from the database and match it with the textfile. I am not sure how to go about creating a data dictionary. This is what I have so far.
This is to read the textfile, which is working fine.
using (StreamReader file = new StreamReader("C:\\Test1.txt"))
{
string nw = file.ReadLine();
textBox1.Text += nw + "\r\n";
while (!file.EndOfStream)
{
string text = file.ReadLine();
textBox1.Text += text + "\r\n";
string[] split_words = text.Split('|');
int dob = int.Parse(split_words[3]);
This is what I have so far to create the Data Dictionary.
public static Dictionary<int, string> dictionary = new Dictionary<int, string>();
You can use a SqlDataReader. Here is some code, you just need to modify it to suit your needs. I have added comments for you:
// declare the SqlDataReader, which is used in
// both the try block and the finally block
SqlDataReader rdr = null;
// Put your connection string here
SqlConnection conn = new SqlConnection(
"Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI");
// create a command object. Your query will go here
SqlCommand cmd = new SqlCommand(
"select * from Customers", conn);
try
{
// open the connection
conn.Open();
// 1. get an instance of the SqlDataReader
rdr = cmd.ExecuteReader();
while (rdr.Read())
{
string id = (int)rdr["SomeColumn"];
string name = (string)rdr["SomeOtherColumn"];
dictionary.Add(id, name);
}
}
finally
{
// 3. close the reader
if (rdr != null)
{
rdr.Close();
}
// close the connection
if (conn != null)
{
conn.Close();
}
}
I am trying to select a single row on a gridview and have that selection take me to a separate edit page with the data populated. I have the idea of using a session variable to hold the row id and then retrieving the data on page load and populating the text boxes. My question is whether or not this is the best method to go about doing this? I would prefer to not use the inline edit option in gridview as I have too many columns that would require scrolling horizontally. Here is my page load method using the session variable:
if (Session["editID"] != null)
{
dbCRUD db = new dbCRUD();
Recipe editRecipe = new Recipe();
var id = Convert.ToInt32(Session["editID"]);
Session.Remove("editID");
editRecipe = db.SelectRecord(id);
addName.Text = editRecipe.Name;
}
Here is the SelectRecord method that is used to retrieve the row:
public Recipe SelectRecord(int id)
{
Recipe returnedResult = new Recipe();
var dbConn = new SqlConnection(connString);
var dbCommand = new SqlCommand("dbo.selectRecipe", dbConn);
dbCommand.CommandType = CommandType.StoredProcedure;
dbCommand.Parameters.Add("#ID", SqlDbType.Int).Value = id;
dbConn.Open();
SqlDataReader reader = dbCommand.ExecuteReader();
while (reader.HasRows)
{
while (reader.Read())
{
returnedResult.Name = reader["Name"].ToString();
}
}
dbConn.Close();
return returnedResult;
}
I'm probably not utilizing the SQLDataReader appropriately, but my result is no data in the reader therefore no returned data when calling the method. Any help is appreciated - thanks in advance!
Few things you should be aware of here:
1.
You should use while (reader.HasRows) in case your stored procedure returns multiple resultsets. In that case you have to iterate through the result sets. See Retrieving Data Using a DataReader. So, if selectRecipe returns multiple resultsets (I am assuming this is not the case), change your code to this:
while (reader.HasRows)
{
while (reader.Read())
{
returnedResult.Name = reader["Name"].ToString();
}
reader.NextResult();
}
2.If selectRecipe returns single result set, change the while loop to if(){}:
if(reader.HasRows)
{
while (reader.Read())
{
returnedResult.Name = reader["Name"].ToString();
}
}
3. I would probably use using to manage the connection better (using Statement) :
public Recipe SelectRecord(int id)
{
Recipe returnedResult = new Recipe();
using (SqlConnection dbConn = new SqlConnection(connString))
{
var dbCommand = new SqlCommand("dbo.selectRecipe", dbConn);
dbCommand.CommandType = CommandType.StoredProcedure;
dbCommand.Parameters.AddWithValue("#ID", id);
dbConn.Open();
SqlDataReader reader = dbCommand.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
returnedResult.Name = reader["Name"].ToString();
}
}
reader.Close();
}
return returnedResult;
}
I am trying to retrieve a list of the worksheets in an Excel workbook, but the collection I get back has both the sheet names and the data column id's, which seem to be called 'Defined Names' in the original xlsx xml. Can you tell me how to return only the worksheet names?
The code I'm using is along the lines of:
OleDbConnection connExcel = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;"
+ #"Data Source=" + FilePath + ";"
+ #"Extended Properties=""Excel 8.0;HDR=Yes;""");
OleDbCommand cmdExcel = new OleDbCommand();
cmdExcel.Connection = connExcel;
connExcel.Open();
DataTable testTable = connExcel.GetSchema("Tables");
The contents of the resulting testTable collection contain entries under TABLE_NAME of:
DATA1
DATA2
DATA3
DATA4
DATA5
Sheet1$
TEST1
-TEST2
TESTHKEY
TESTKEYS
TESTVKEY
They all have a TABLE_TYPE of TABLE.
The original workbook corresponding to the above would have 1 worksheet containing 5 columns, the first row would contain a header. I'm only interested in the Sheet1$ entry. The spreadsheet is
created in Excel 2010, I'm trying to process it in an ASP.NET 4 app written in C#. Potentially, the worksheet name may have been changed so I can't guarrantee that it will always be Sheet1$.
My first thoughts were wrong so I came up with this as a workaround. The actual worksheet names returned should always end with $, so I hacked it to check for that. Messy but you get the general idea I'm sure.
OleDbConnection connExcel = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;"
+ #"Data Source=c:\test.xlsx;"
+ #"Extended Properties=""Excel 12.0 Xml;HDR=Yes;""");
OleDbCommand cmdExcel = new OleDbCommand();
cmdExcel.Connection = connExcel;
connExcel.Open();
DataTable testTable = connExcel.GetSchema("Tables");
String[] excelSheets = new String[testTable.Rows.Count];
int i = 0;
foreach (DataRow row in testTable.Rows)
{
excelSheets[i] = row["TABLE_NAME"].ToString();
if (excelSheets[i].EndsWith("$"))
{
Console.WriteLine(excelSheets[i] = row["TABLE_NAME"].ToString());
i++;
}
else
{
i++;
}
}
Console.ReadLine();
I had a similar issue but with the exception that it showed me Sheets that didn't exist in Excel. Even though this post is a bit old now, maybe somebody finds this and finds it helpful.
My Code:
//OpenFileDialog
try
{
OpenFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
OpenFileDialog.Filter = "XLSX Files(*.xlsx)|*.xlsx|All Files (*.*)|*.*";
OpenFileDialog.ShowDialog();
}
catch (Exception ex)
{
//some Error Message
}
//read into Combobox
try
{
OleDbConnection con = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + OpenFileDialog.FileName + ";Extended Properties=Excel 12.0;");
con.Open();
DataTable dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
con.Close();
this.Combobox.Items.Clear();
for (int i = 0; i < dt.Rows.Count; i++)
{
String sheetName = dt.Rows[i]["TABLE_NAME"].ToString();
sheetName = sheetName.Substring(0, sheetName.Length - 1);
//cheap Filter to filter out unneeded/wrong sheets
if (sheetName.Replace("'", " ").Replace("$", " ").TrimStart().TrimEnd().Contains("#") != true)
{
this.Combobox.Items.Add(sheetName.Replace("'", " ").Replace("$", " ").TrimStart().TrimEnd());
}
}
}
catch (Exception Ex)
{
//some Error Message
}
This might not be the best solution, but it works quite well for me.
private static string EXCEL_CONNECTIONSTRING = string.Format("Provider=Microsoft.ACE.OLEDB.12.0; data source={0}; Extended Properties=Excel 12.0;", "#{FILENAME}");
private IEnumerable<string> GetWorksheetNames(string excelFile)
{
var currentConnectionString = EXCEL_CONNECTIONSTRING.Replace("#{FILENAME}", excelFile);
using (OleDbConnection connection = new OleDbConnection(currentConnectionString))
{
OleDbCommand cmdExcel = new OleDbCommand();
cmdExcel.Connection = connection;
connection.Open();
DataTable dt = connection.GetSchema("Tables");
IEnumerable<string> excelSheets = dt.Rows.Cast<DataRow>().Select(row => row["TABLE_NAME"].ToString());
dt.Dispose();
connection.Close();
return excelSheets;
}
}
Is there any way to convert PDF file to DataTable? The PDF file mainly consist of only tables any help will be highly appreciated.
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;
public DataTable ImportPDF(string Filename)
{
string strText = string.Empty;
List<string[]> list = new List<string[]>();
string[] PdfData = null;
try
{
PdfReader reader = new PdfReader((string)Filename);
for (int page = 1; page <= reader.NumberOfPages; page++)
{
ITextExtractionStrategy its = new iTextSharp.text.pdf.parser.LocationTextExtractionStrategy();
String cipherText = PdfTextExtractor.GetTextFromPage(reader, page, its);
cipherText = Encoding.UTF8.GetString(ASCIIEncoding.Convert(Encoding.Default, Encoding.UTF8, Encoding.Default.GetBytes(cipherText)));
strText = strText + "\n" + cipherText;
PdfData = strText.Split('\n');
}
reader.Close();
}
catch (Exception ex)
{
}
List<string> temp = PdfData.ToList();
temp.RemoveAt(0);
list = temp.ConvertAll<string[]>(x => x.Split(' ').ToArray());
List<string> columns = list.FirstOrDefault().ToList();
DataTable dtTemp = new DataTable();
columns.All(x => { dtTemp.Columns.Add(new DataColumn(x)); return true; });
list.All(x => { dtTemp.Rows.Add(dtTemp.NewRow().ItemArray = x); return true; });
return dtTemp;
}
If the PDF contains marked content (you can see how to find this in my blog article http://www.jpedal.org/PDFblog/2010/09/the-easy-way-to-discover-if-a-pdf-file-contains-structured-content/) you can extract it from the PDF file. Otherwise you will need to extract the text and try to guess the structure.