I need to get all document formatted text from an excel spreadsheet.
I need a better solution that this. This achieves my goal but does not scale at all!
StringBuilder strData = new StringBuilder();
var worksheets = ReferenceDocument.Worksheets;
foreach (Excel._Worksheet worksheet in worksheets)
{
foreach (var cell in worksheet.UsedRange.Cast<Excel.Range>())
{
object value = cell.Text;
string strValue = value == null ? null : value.ToString();
if (!String.IsNullOrWhiteSpace(strValue)) strData.AppendLine(strValue);
}
}
EDIT: I've tried calling worksheet.UsedRange.Text to get an array of strings, but unfortunately it returns System.DbNull and not an array.
I couldn't find anything in the Excel object model I could use. I solved issue by using OleDb
StringBuilder strData = new StringBuilder();
ReferenceDocument.SaveCopyAs(strSomeTempFile);
var cnnStr = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended properties=\"Excel 8.0;IMEX=1;HDR=NO\"", strSomeTempFile);
var cnn = new OleDbConnection(cnnStr);
try
{
cnn.Open();
var schemaTable = cnn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
foreach(DataRow schemaRow in schemaTable.Rows)
{
string worksheetName = schemaRow["table_name"].ToString().Replace("'", "");
string sql = String.Format("select * from [{0}]", worksheetName);
var da = new OleDbDataAdapter(sql, cnn);
var dt = new DataTable();
da.Fill(dt);
foreach (DataRow row in dt.Rows)
foreach (DataColumn col in dt.Columns)
{
var value = row[col.ColumnName];
if (!(value is System.DBNull)) strData.AppendLine(value.ToString());
}
}
}
catch (Exception e)
{
// handle error
throw;
}
finally
{
cnn.Close();
}
return strData;
Related
In the c# closedXML plugin, I get this message
Unable to set cell value to 10/27/2017 10:14:23 AM +00:00
c#
public static async Task<string> SaveToExcel(string command, Dictionary<string, object> h, string domain, string sheet_name, string[] headers)
{
SqlConnection myConnection = new SqlConnection(GetConnectionString(domain));
await myConnection.OpenAsync();
SqlCommand myCommand = new SqlCommand(command, myConnection);
foreach (KeyValuePair<string, object> entry in h)
{
myCommand.Parameters.AddWithValue(entry.Key, entry.Value ?? DBNull.Value);
}
System.Diagnostics.Debug.WriteLine(myCommand.CommandText);
SqlDataAdapter sda = new SqlDataAdapter();
sda.SelectCommand = myCommand;
DataTable dt = new DataTable();
sda.Fill(dt);
// add headers
DataRow dr = dt.NewRow();
for(int i=0; i<headers.Length; i++)
{
//dr[i] = headers[i];
}
//dt.Rows.InsertAt(dr, 0);
string filepath = Excel.SaveExcel(dt, sheet_name);
dt.Dispose();
sda.Dispose();
myCommand.Dispose();
myConnection.Close();
return filepath;
}
public static string SaveExcel(System.Data.DataTable dt, string SheetName)
{
// create the Excel workbook
var wb = new XLWorkbook();
// creates the worksheet
var ws = wb.AddWorksheet(SheetName);
// add data
ws.Cell(1, 1).InsertTable(dt);
// the range for which you want to add a table style
var range = ws.Range(1, 1, dt.Rows.Count, dt.Columns.Count);
// create the actual table
var table = range.CreateTable();
// adjust size
ws.Columns().AdjustToContents();
// apply style
table.Theme = XLTableTheme.TableStyleMedium5;
// save file as temp
string result = Path.GetTempFileName();
wb.SaveAs(result);
return result;
}
How can I fix this?
Thanks
I need to read a single cell from an xsl excel file to a string withing the web application i am building. I was previously pulling cell ranges from the file to a table using the following code:
string PullFromExcell(string CellNo)
{
string cell;
string properties = String.Format(#"Provider = Microsoft.Jet.OLEDB.4.0; Data Source = C:\Users\User\Desktop\file.xls; Extended Properties = 'Excel 8.0;'");
using (OleDbConnection conn = new OleDbConnection(properties))
{
string worksheet = "Sheet";
conn.Open();
DataSet ds = new DataSet();
using (OleDbDataAdapter da = new OleDbDataAdapter("SELECT * FROM [" + worksheet + "$" + CellNo + "]", properties))
{
DataTable dt = new DataTable();
cell = dt.ToString();
da.Fill(dt);
ds.Tables.Add(dt);
grdComponent.DataSource = dt;
grdComponent.DataBind();
}
}
return cell;
}
How would i send that to a string? The code that i would use when pulling from a database is similar to this:
Sqlstring = "Select data from variable where name = 'fred' and ssn = 1234";
var cmd0 = new SqlCommand(Sqlstring, Class_Connection.cnn);
string Data = cmd0.ExecuteScalar().ToString();
i'm just not sure if any of that is compatible.
After filling DataTable, you can search the row like this:
foreach (DataRow dr in dt.Rows)
{
if (dr["name"] == "fred" && dr["ssn"] == "1234")
{
cell = dr["data"].ToString();
break;
}
}
I want to add data from a CSV file into a column of a table in SQL Server. My code is running but data not reaching the column.
private void btCode_Click(object sender, RoutedEventArgs e)
{
//string constring = "Data Source=.;Initial Catalog=*******;Integrated Security=True";
string filepath = "C:\\code.csv";
StreamReader sr = new StreamReader(filepath);
string line = sr.ReadLine();
string[] value = line.Split(',');
DataTable dt = new DataTable();
DataRow row;
foreach (string Code in value)
{
dt.Columns.Add(new DataColumn(Code));
}
while:
while ( !sr.EndOfStream )
{
value = sr.ReadLine().Split(',');
if(value.Length == dt.Columns.Count)
{
row = dt.NewRow();
row.ItemArray = value;
dt.Rows.Add(row);
}
}
SqlBulkCopy bc = new SqlBulkCopy(sc.ConnectionString, SqlBulkCopyOptions.TableLock);
bc.DestinationTableName = "CodesTable";
bc.BatchSize = dt.Rows.Count;
sc.Open();
bc.WriteToServer(dt);
bc.Close();
sc.Close();
Y dont you try with reading CSV directly using OleDbConnection and then load it to datatable using OleDbDataAdapter.
secondly you can add try catch block to see if its throwing some exception.
I have a excel sheet with two tabs so i want to get a row from one tab and insert into another,i thought it would be same like in sqlserver or mysql . Just select and insert..
I am using this query but it says syntax error not sure what is wrong in it.
testCommand.CommandText = "Insert into [ActiveLicenses$]( Select * from [companies$]
where [License Number] = '" + lnumber + "')";
testCommand.ExecuteNonQuery();
UPDATE
Is there any way to delete the rows directly from excel sheet?
You can use SQL to extract the data from Excel:
using (OleDbDataAdapter da = new OleDbDataAdapter(
"SELECT " + columns + " FROM [" + worksheetName + "$]", conn))
{
DataTable dt = new DataTable(tableName);
da.Fill(dt);
ds.Tables.Add(dt);
}
Unfortunately inserting into excel doesn't work this way. I am pretty sure you cant specify a cell to write to using OleDb Insert Command, it will automatically go to the next open row in the specified column. You can workaround it with an update statement:
sql = "Update [Sheet1$A1:A10] SET A10 = 'YourValue'";
myCommand.CommandText = sql;
myCommand.ExecuteNonQuery();
Personally I would use VSTO rather than oleDB. Once you have extracted the cell simply open up the spreadsheet with code and insert the data:
Excel.Workbook wb = xlApp.Workbooks.Open(filePath);
rng = wb.Range["A1"];
rng.Value2 = "data";
A faster method.
I take all the licenses into a DataTable and remove the ones not required takes less than 1 minute. and then simply export DataTable to Csv so i have the file ready in less than 1 minute.
Sample below:
static List<string> licensecAll = new List<string>();
DataTable dt = new DataTable();
OleDbDataAdapter dp = new OleDbDataAdapter("select * from [companies$]", testCnn);
dp.Fill(dt);
if (dt.Rows.Count > 0)
{
for (int i = dt.Rows.Count-1; i >= 0; i--)
{
string lnum = dt.Rows[i][0].ToString();
Console.WriteLine("LICENSE NUMBER" + lnum);
if (!licensecAll.Contains(lnum))
{
Console.WriteLine("ROW REMOVED");
dt.Rows.RemoveAt(i);
}
}
}
Then simply run datatable to csv....
public static void DataTable2CSV(DataTable table, string filename, string seperateChar)
{
StreamWriter sr = null;
try
{
sr = new StreamWriter(filename);
string seperator = "";
StringBuilder builder = new StringBuilder();
foreach (DataColumn col in table.Columns)
{
builder.Append(seperator).Append(col.ColumnName);
seperator = seperateChar;
}
sr.WriteLine(builder.ToString());
foreach (DataRow row in table.Rows)
{
seperator = "";
builder = new StringBuilder();
foreach (DataColumn col in table.Columns)
{
builder.Append(seperator).Append(row[col.ColumnName]);
seperator = seperateChar;
}
sr.WriteLine(builder.ToString());
}
}
finally
{
if (sr != null)
{
sr.Close();
}
}
}
What i need id to take the first column of an excel file and put that column in a string variable but numbers that will be taken from excel to be separated with blank space.
For Example:
Excel file:
1
3
4
56
76
7
876
23
43
(in column)
and string in C#
string number = "1 3 4 56 76 7 876 23 43"
Any code will help me
I have made the connection with excel file and i have created the dataset/datatable
but now i can not take those numbers as the sample above ?
If you have the data in a datset...you can do something like this....
////TRY THIS!!!
DataSet dsExcelContent = new DataSet();
//Fill from db
//
StringBuilder builder = new StringBuilder();
foreach (DataRow row in dsExcelContent.Tables[0].Rows)
{
builder.Append(row[0].ToString());
builder.Append(" ");
}
Console.WriteLine(builder.ToString());
.....More exact to your code....
OleDbConnection objConn = new OleDbConnection(sConnectionString);
objConn.Open();
OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [sheet1$]", objConn);
OleDbDataAdapter objAdapter1 = new OleDbDataAdapter();
objAdapter1.SelectCommand = objCmdSelect;
DataSet dsExcelContent = new DataSet();
DataTable dsExcelContent1 = new DataTable();
objAdapter1.Fill(dsExcelContent);
dataGridView1.DataSource = dsExcelContent1;
objConn.Close();
int test = dsExcelContent.Tables[0].Rows.Count;
StringBuilder builder = new StringBuilder();
foreach (DataRow row in dsExcelContent.Tables[0].Rows)
{
builder.Append(row[0].ToString());
builder.Append(" ");
}
//s has the data you want.....
string s = builder.ToString();
//REST OF YOUR CODE.....
Have a link - Reading Excel Document
Here's what I would do...first open the spreadsheet with this code.
xlApp = New Excel.Application
filePath = "FILENAME"
xlWorkBook = xlApp.Workbooks.Open(filePath)
xlWorkSheet = xlWorkBook.Worksheets(1)
Then read through the column like this
For data As Integer = 0 To 8
Dim obj As Excel.Range = CType(xlWorkSheet.Cells(data, 1), Range)
If obj.Value IsNot Nothing Then
MyArray(data) = obj.Value
Else
Exit Do
End If
Next
Then you should have all your data in MyArray then loop through and create a string with spaces and you should be good. This code is in VB but it should give you a good idea of the commands and structure to use.
private void Form1_Load(object sender, EventArgs e)
{
String sConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0; Data Source=unsorted.xls;Extended Properties=""Excel 12.0;HDR=NO;""";
OleDbConnection objConn = new OleDbConnection(sConnectionString);
objConn.Open();
OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [sheet1$]", objConn);
OleDbDataAdapter objAdapter1 = new OleDbDataAdapter();
objAdapter1.SelectCommand = objCmdSelect;
DataSet dsExcelContent = new DataSet();
DataTable dsExcelContent1 = new DataTable();
objAdapter1.Fill(dsExcelContent);
dataGridView1.DataSource = dsExcelContent1;
objConn.Close();
int test = dsExcelContent.Tables[0].Rows.Count;
foreach(DataRow row in dsExcelContent.Tables[0].Rows)
{
StringBuilder builder = new StringBuilder();
foreach (DataColumn col in dsExcelContent.Tables[0].Columns)
{
builder.Append(row[col].ToString());
builder.Append(" ");
}
string s = builder.ToString();
this.label1.Text = s;
string[] numbers = s.Split(' ');
ArrayList numberList = new ArrayList();
int i;
foreach (String num in numbers)
{
if (Int32.TryParse(num, out i))
{
numberList.Add(i);
}
else
Console.WriteLine("'{0}' is not a number!", num);
}
this.listBox1.DataSource = numberList;
}
}
}
You just want to loop through the rows in the Dataset now:
var numberStr = EmptyStr;
foreach (DataRow dr in MyDataSet.Tables[0].Rows)
{
numberStr = EmptyStr ? numberStr += dr[0].ToString() : numberStr += " " + dr[0].ToString();
}
Updated Solution
private void Form1_Load(object sender, EventArgs e)
{
String s = String.Empty;
String sConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;DataSource=unsorted.xls;Extended Properties=""Excel 12.0;HDR=NO;""";
using (OleDbConnection conn = new OleDbConnection(sConnectionString))
{
conn.Open();
DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
foreach (DataRow schemaRow in schemaTable.Rows)
{
string sheet = schemaRow["TABLE_NAME"].ToString();
OleDbCommand cmd = new OleDbCommand("SELECT * FROM [" + sheet + "]", conn);
cmd.CommandType = CommandType.Text;
DataTable outputTable = new DataTable(sheet);
output.Tables.Add(outputTable);
new OleDbDataAdapter(cmd).Fill(outputTable);
}
// populate string with value from rows
foreach (DataRow dr in MyDataSet.Tables[0].Rows)
{
s = String.Empty ? s += dr[0].ToString() : s += " " + dr[0].ToString();
}
dataGridView1.DataSource = dsExcelContent1;
objConn.Close();
}
this.label1.Text = s;
string[] numbers = s.Split(' ');
ArrayList numberList = new ArrayList();
int i;
foreach (String num in numbers)
{
if (Int32.TryParse(num, out i))
{
numberList.Add(i);
}
else
{
Console.WriteLine("'{0}' is not a number!", num);
}
}
this.listBox1.DataSource = numberList;
}