Using C# remove unnecessary “TABLE_NAME” from Excel worksheets - asp.net-mvc-4

Question

Can anyone tell me, I am going to upload excel file, this file has unnecessary table like "_xlnm#Print_Titles" that I need to remove or delete that field. This a my method. But it is does not work for remove or delete.
static string[] GetExcelSheetNames(string connectionString)
{
OleDbConnection con = null;
DataTable dt = null;
con = new OleDbConnection(connectionString);
con.Open();
dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if ((dt == null) )
{
return null;
}
String[] excelSheetNames = new String[dt.Rows.Count];
int i = 0;
foreach (DataRow row in dt.Rows)
{
excelSheetNames[i] = row["TABLE_NAME"].ToString();
if ((excelSheetNames[i].Contains("_xlnm#Print_Titles") || (excelSheetNames[i].Contains("Print_Titles"))))
{
if (true)
{
row.Table.Rows.Remove(row);
dt.AcceptChanges();
}
}
i++;
}
return excelSheetNames;
}

Answer 1

Instead of removing items in the foreach loop, we'll find them and add them to a list, then we'll go through that list and remove them from your data table.
static string[] GetExcelSheetNames(string connectionString)
{
OleDbConnection con = null;
DataTable dt = null;
con = new OleDbConnection(connectionString);
con.Open();
dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if ((dt == null))
{
return null;
}
String[] excelSheetNames = new String[dt.Rows.Count];
var rowsToRemove = new List<DataRow>();
for (int i = 0; i < dt.Rows.Count; i++)
{
var row = dt.Rows[i];
excelSheetNames[i] = row["TABLE_NAME"].ToString();
if ((excelSheetNames[i].Contains("_xlnm#Print_Titles") || (excelSheetNames[i].Contains("Print_Titles"))))
{
rowsToRemove.Add(dt.Rows[i]);
}
i++;
}
foreach (var dataRow in rowsToRemove)
{
dt.Rows.Remove(dataRow);
}
return excelSheetNames;
}

Answer 2

Those _xlnm and "$" are sheets that, turns out, shouldn't be normally accessed by the users.
You can solve this in 2 ways.
Ignore them
Drop them
The former is highly recommended.
To do this you need to use the following code:
if (!dt.Rows[i]["Table_Name"].ToString().Contains("FilterDatabase") && !dt.Rows[i]["Table_Name"].ToString().EndsWith("$'"))
{
}
You can either use .Contains() and/or .EndsWith() to filter out those sheets.