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How to insert bookmarks and bookmark values from the table in the existing template repeatedly (in loop) using Aspose.Words in.Net

I try to insert bookmarks and bookmark values from the table in the existing template repeatedly (in loop) using Aspose.Words in.Net using Aspose.Words

#Manil,
You can meet this requirement by using the Mail Merge with Regions feature of 'Aspose.Words for .NET' API. For example, please see these sample input/output Word documents and try running the following code:
DataTable dt = GetDataTable();
Document doc = new Document("E:\\temp\\TableStart.docx");
doc.MailMerge.FieldMergingCallback = new HandleMergeField();
doc.MailMerge.ExecuteWithRegions(dt);
doc.Save("E:\\Temp\\19.8.docx");
private static DataTable GetDataTable()
{
DataTable dataTable = new DataTable("tbl");
dataTable.Columns.Add(new DataColumn("mf1"));
dataTable.Columns.Add(new DataColumn("mf2"));
dataTable.Columns.Add(new DataColumn("mf3"));
DataRow dataRow;
for (int i = 0; i < 5; i++)
{
dataRow = dataTable.NewRow();
dataRow[0] = "Some Text " + i;
dataRow[1] = "Some Bookmaked Text " + i;
dataRow[2] = "Again Some Text " + i;
dataTable.Rows.Add(dataRow);
}
return dataTable;
}
public class HandleMergeField : IFieldMergingCallback
{
void IFieldMergingCallback.FieldMerging(FieldMergingArgs e)
{
if (e.FieldName.Equals("mf2"))
{
DocumentBuilder builder = new DocumentBuilder(e.Document);
builder.MoveToMergeField(e.FieldName);
builder.Font.Color = Color.Red;
builder.StartBookmark("bm_" + e.RecordIndex);
builder.Write(e.FieldValue.ToString());
builder.EndBookmark("bm_" + e.RecordIndex);
}
}
void IFieldMergingCallback.ImageFieldMerging(ImageFieldMergingArgs args)
{
// Do nothing.
}
}
Hope, this helps. I work with Aspose as Developer Evangelist.

Extract CSV data into datagridview after a specific word

So I have a csv files and I want to extract its data into a datagridview and then save this to a database. I only want it to save data displayed after "Tango N$10 Voucher Benefit,10" (See the CSV file extract to understand) I am using a windows application C#. Here is what I tried so far.
try
{
var filePath = Path.GetFullPath(openAirtimeFile.FileName);
foreach (var line in File.ReadAllLines(filePath))
{
var thisLine = line;//.Trim();
if (thisLine.StartsWith("Tango", StringComparison.OrdinalIgnoreCase))
{
string[] data = File.ReadAllLines(filePath);
DataTable dt = new DataTable();
string[] col = data[0].Split(',');
foreach (string s in col)
{
dt.Columns.Add(s, typeof(string));
}
for (int i = 0; i < data.Length; i++)
{
string[] row = data[i].Split(',');
dt.Rows.Add(row);
}
dataGridView1.DataSource = dt;
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
}
}
CSV file looks like this:
Please help. How do I display data after "Tango N$10 Voucher Benefit,10"?

You're doing a File.ReadAllLines two times, so your inner if statement is useless. Perhaps try something like this.
disclaimer, this only works assuming Tango will be at the start of your csv file
try
{
var filePath = Path.GetFullPath(openAirtimeFile.FileName);
bool FoundTango = false;
foreach (var line in File.ReadAllLines(filePath))
{
var thisLine = line;//.Trim();
if (thisLine.StartsWith("Tango", StringComparison.OrdinalIgnoreCase))
{
FoundTango = true;
continue; //Tango has been found, skip to next iteration
}
if (FoundTango)
{
DataTable dt = new DataTable();
string[] col = line.Split(',');
foreach (string s in col)
{
dt.Columns.Add(s, typeof(string));
}
for (int i = 0; i < data.Length; i++)
{
string[] row = line.Split(',');
dt.Rows.Add(row);
}
dataGridView1.DataSource = dt;
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
}
}

How to Concatenate an Excel File Using a DataTable?

I have a DataTable being generated using the C# NI DAQmx code. I want to take this DataTable and put it in an excel file when a CheckBox is checked. The DAQmx code records this data 'x' number of samples at a time. When this number is high, the program is slow, but it still works. I want to record a low number of samples at a time, and then save that data into an excel file.
In my current code, the data in the excel file is constantly overwritten. This is not desirable, as I need all recorded data.
Currently the data will actively record when the box is checked, but it will not concatenate. I have tried many searches and explored many methods for this, but I haven't quite been able to adapt anything for my needs.
Relevant code will be included below. Any help is appreciated, thanks.
Note: Data does not have to be a .xlsx file. It can be a .csv
This code is the DataTable generation via DAQmx:
private void DataToDataTable(AnalogWaveform<double>[] sourceArray, ref DataTable dataTable)
{
// Iterate over channels
int currentLineIndex = 0;
string test = currentLineIndex.ToString();
foreach (AnalogWaveform<double> waveform in sourceArray)
{
for (int sample = 0; sample < waveform.Samples.Count; ++sample)
{
if (sample == 50)
break;
dataTable.Rows[sample][currentLineIndex] = waveform.Samples[sample].Value;
}
currentLineIndex++;
}
}
public void InitializeDataTable(AIChannelCollection channelCollection, ref DataTable data)
{
int numOfChannels = channelCollection.Count;
data.Rows.Clear();
data.Columns.Clear();
dataColumn = new DataColumn[numOfChannels];
int numOfRows = 50;
for (int currentChannelIndex = 0; currentChannelIndex < numOfChannels; currentChannelIndex++)
{
dataColumn[currentChannelIndex] = new DataColumn()
{
DataType = typeof(double),
ColumnName = channelCollection[currentChannelIndex].PhysicalName
};
}
data.Columns.AddRange(dataColumn);
for (int currentDataIndex = 0; currentDataIndex < numOfRows ; currentDataIndex++)
{
object[] rowArr = new object[numOfChannels];
data.Rows.Add(rowArr);
}
}
This is my current method of saving to an Excel file:
private void Excel_cap_CheckedChanged(object sender, EventArgs e)
{
int i = 0;
for (excel_cap.Checked = true; excel_cap.Checked == true; i ++) {
{
StringBuilder sb = new StringBuilder();
IEnumerable<string> columnNames = dataTable.Columns.Cast<DataColumn>().
Select(column => column.ColumnName);
sb.AppendLine(string.Join(",", columnNames));
foreach (DataRow row in dataTable.Rows)
{
IEnumerable<string> fields = row.ItemArray.Select(field => field.ToString());
sb.AppendLine(string.Join(",", fields));
}
File.AppendAllText(filename_box.Text, sb.ToString());
}
}
}

Since you mentioned it does not have to be Excel, it could be a CSV, then you can use your CSV code but change the File.WriteAllText line to File.AppendAllText which will append the text rather than replacing the existing file. AppendAllText will create the file if it doesn't exist.
File.AppendAllText("test.csv", sb.ToString());

Are you sure you are using EPPlus? This CreateExcelFile looks like it is a copied code snippet.
With EPPlus, this would be as easy as
using (var package = new ExcelPackage(new FileInfo(#"a.xslx")))
{
if (!package.Workbook.Worksheets.Any())
package.Workbook.Worksheets.Add("sheet");
var sheet = package.Workbook.Worksheets.First();
var appendRow = (sheet.Dimension?.Rows ?? 0) + 1;
sheet.Cells[appendRow, 1].LoadFromDataTable(new DataTable(), false);
package.SaveAs(new FileInfo(#"a.xslx"));
}
It looks like you have some objects, then convert them to DataTable and then write them to Excel/CSV. If you skip the to DataTable conversion, you'll speed things up. EPPlus has LoadFromCollection which may just work with your AnalogWaveform<double>.
Shameless advertisement: I got these snippets from my blog post about EPPlus.

Import Part of CSV to datagridview

What I have is a CSV that I have imported into a Datagridview.
I am now looking for a way to only import the column with the header # and Delay and not all info in the CSV, so any help on this would be appreciated.
Here is the Code I have thus far:
private void button1_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK) // Test result.
{
String Fname = openFileDialog1.FileName;
//String Sname = "export";
string[] raw_text = System.IO.File.ReadAllLines(Fname);
string[] data_col = null;
int x = 0;
foreach (string text_line in raw_text)
{
data_col = text_line.Split(';');
if (x == 0)
{
for (int i = 0; i < data_col.Count(); i++)
{
dt.Columns.Add(data_col[i]);
}
x++;
}
else
{
dt.Rows.Add(data_col);
}
}
dataGridView1.DataSource = dt;
}
}

When I read from CSV files, I create a list of values that I want for each row and use that list as the basis for my INSERT statement to the database.
I know where to find the data I want in the CSV file so I specifically target those items while I'm building my list of parameters for the query.
See the code below:
// Read the file content from the function parameter.
string content = System.Text.Encoding.ASCII.GetString(bytes);
// Split the content into an array where each array item is a line for
// each row of data.
// The Replace simply removes the CarriageReturn LineFeed characters from
// the source text and replaces them with a Pipe character (`|`)
// and then does the split from that character.
// This is just personal preference to do it this way
string[] data = content.Replace("\r\n", "|").Split('|');
// Loop through each row and extract the data you want.
// Note that each value is in a fixed position in the row.
foreach (string row in data)
{
if (!String.IsNullOrEmpty(row))
{
string[] cols = row.Split(';');
List<MySqlParameter> args = new List<MySqlParameter>();
args.Add(new MySqlParameter("#sid", Session["storeid"]));
args.Add(new MySqlParameter("#name", cols[0]));
args.Add(new MySqlParameter("#con", cols[3]));
try
{
// Insert the data to the database.
}
catch (Exception ex)
{
// Report an error.
}
}
}
In the same way, you could build your list/dataset/whatever as a data source for your datagridview. I would build a table.
Here's a mockup (I haven't got time to test it right now but it should get you on the right track).
DataTable table = new DataTable();
table.Columns.Add("#");
table.Columns.Add("Delay");
foreach (var line in raw_text)
{
DataRow row = table.NewRow();
row[0] = line[0]; // The # value you want.
row[1] = line[1]; // The Delay value you want.
table.Rows.Add(row);
}
DataGridView1.DataSource = table;
DataGridView1.DataBind();

Using TextFieldParser can make handling CVS input less brittle:
// add this using statement for TextFieldParser - needs reference to Microsoft.VisualBasic assembly
using Microsoft.VisualBasic.FileIO;
...
// TextFieldParser implements IDisposable so you can let a using block take care of opening and closing
using (TextFieldParser parser = new TextFieldParser(Fname))
{
// configure your parser to your needs
parser.TextFieldType = FieldType.Delimited;
parser.Delimiters = new string[] { ";" };
parser.HasFieldsEnclosedInQuotes = false; // no messy code if your data comes with quotes: ...;"text value";"another";...
// read the first line with your headers
string[] fields = parser.ReadFields();
// add the desired headers with the desired data type
dt.Columns.Add(fields[2], typeof(string));
dt.Columns.Add(fields[4], typeof(string));
// read the rest of the lines from your file
while (!parser.EndOfData)
{
// all fields from one line
string[] line = parser.ReadFields();
// create a new row <-- this is missing in your code
DataRow row = dt.NewRow();
// put data values; cast if needed - this example uses string type columns
row[0] = line[2];
row[1] = line[4];
// add the newly created and filled row
dt.Rows.Add(row);
}
}
// asign to DGV
this.dataGridView1.DataSource = dt;

Exporting datagridview to csv file

I'm working on a application which will export my DataGridView called scannerDataGridView to a csv file.
Found some example code to do this, but can't get it working. Btw my datagrid isn't databound to a source.
When i try to use the Streamwriter to only write the column headers everything goes well, but when i try to export the whole datagrid including data i get an exeption trhown.
System.NullReferenceException: Object reference not set to an instance
of an object. at Scanmonitor.Form1.button1_Click(Object sender,
EventArgs e)
Here is my Code, error is given on the following line:
dataFromGrid = dataFromGrid + ',' + dataRowObject.Cells[i].Value.ToString();
//csvFileWriter = StreamWriter
//scannerDataGridView = DataGridView
private void button1_Click(object sender, EventArgs e)
{
string CsvFpath = #"C:\scanner\CSV-EXPORT.csv";
try
{
System.IO.StreamWriter csvFileWriter = new StreamWriter(CsvFpath, false);
string columnHeaderText = "";
int countColumn = scannerDataGridView.ColumnCount - 1;
if (countColumn >= 0)
{
columnHeaderText = scannerDataGridView.Columns[0].HeaderText;
}
for (int i = 1; i <= countColumn; i++)
{
columnHeaderText = columnHeaderText + ',' + scannerDataGridView.Columns[i].HeaderText;
}
csvFileWriter.WriteLine(columnHeaderText);
foreach (DataGridViewRow dataRowObject in scannerDataGridView.Rows)
{
if (!dataRowObject.IsNewRow)
{
string dataFromGrid = "";
dataFromGrid = dataRowObject.Cells[0].Value.ToString();
for (int i = 1; i <= countColumn; i++)
{
dataFromGrid = dataFromGrid + ',' + dataRowObject.Cells[i].Value.ToString();
csvFileWriter.WriteLine(dataFromGrid);
}
}
}
csvFileWriter.Flush();
csvFileWriter.Close();
}
catch (Exception exceptionObject)
{
MessageBox.Show(exceptionObject.ToString());
}

LINQ FTW!
var sb = new StringBuilder();
var headers = dataGridView1.Columns.Cast<DataGridViewColumn>();
sb.AppendLine(string.Join(",", headers.Select(column => "\"" + column.HeaderText + "\"").ToArray()));
foreach (DataGridViewRow row in dataGridView1.Rows)
{
var cells = row.Cells.Cast<DataGridViewCell>();
sb.AppendLine(string.Join(",", cells.Select(cell => "\"" + cell.Value + "\"").ToArray()));
}
And indeed, c.Value.ToString() will throw on null value, while c.Value will correctly convert to an empty string.

A little known feature of the DataGridView is the ability to programmatically select some or all of the DataGridCells, and send them to a DataObject using the method DataGridView.GetClipboardContent(). Whats the advantage of this then?
A DataObject doesn't just store an object, but rather the representation of that object in various different formats. This is how the Clipboard is able to work its magic; it has various formats stored and different controls/classes can specify which format they wish to accept. In this case, the DataGridView will store the selected cells in the DataObject as a tab-delimited text format, a CSV format, or as HTML (*).
The contents of the DataObject can be retrieved by calling the DataObject.GetData() or DataObject.GetText() methods and specifying a predefined data format enum. In this case, we want the format to be TextDataFormat.CommaSeparatedValue for CSV, then we can just write that result to a file using System.IO.File class.
(*) Actually, what it returns is not, strictly speaking, HTML. This format will also contain a data header that you were not expecting. While the header does contain the starting position of the HTML, I just discard anything above the HTML tag like myString.Substring(IndexOf("<HTML>"));.
Observe the following code:
void SaveDataGridViewToCSV(string filename)
{
// Choose whether to write header. Use EnableWithoutHeaderText instead to omit header.
dataGridView1.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableAlwaysIncludeHeaderText;
// Select all the cells
dataGridView1.SelectAll();
// Copy selected cells to DataObject
DataObject dataObject = dataGridView1.GetClipboardContent();
// Get the text of the DataObject, and serialize it to a file
File.WriteAllText(filename, dataObject.GetText(TextDataFormat.CommaSeparatedValue));
}
Now, isn't that better? Why re-invent the wheel?
Hope this helps...

Please check this code.its working fine
try
{
//Build the CSV file data as a Comma separated string.
string csv = string.Empty;
//Add the Header row for CSV file.
foreach (DataGridViewColumn column in dataGridView1.Columns)
{
csv += column.HeaderText + ',';
}
//Add new line.
csv += "\r\n";
//Adding the Rows
foreach (DataGridViewRow row in dataGridView1.Rows)
{
foreach (DataGridViewCell cell in row.Cells)
{
if (cell.Value != null)
{
//Add the Data rows.
csv += cell.Value.ToString().TrimEnd(',').Replace(",", ";") + ',';
}
// break;
}
//Add new line.
csv += "\r\n";
}
//Exporting to CSV.
string folderPath = "C:\\CSV\\";
if (!Directory.Exists(folderPath))
{
Directory.CreateDirectory(folderPath);
}
File.WriteAllText(folderPath + "Invoice.csv", csv);
MessageBox.Show("");
}
catch
{
MessageBox.Show("");
}

Found the problem, the coding was fine but i had an empty cell that gave the problem.

Your code was almost there... But I made the following corrections and it works great. Thanks for the post.
Error:
string[] output = new string[dgvLista_Apl_Geral.RowCount + 1];
Correction:
string[] output = new string[DGV.RowCount + 1];
Error:
System.IO.File.WriteAllLines(filename, output, System.Text.Encoding.UTF8);
Correction:
System.IO.File.WriteAllLines(sfd.FileName, output, System.Text.Encoding.UTF8);

The line "csvFileWriter.WriteLine(dataFromGrid);" should be moved down one line below the closing bracket, else you'll get a lot of repeating results:
for (int i = 1; i <= countColumn; i++)
{
dataFromGrid = dataFromGrid + ',' + dataRowObject.Cells[i].Value.ToString();
}
csvFileWriter.WriteLine(dataFromGrid);

I think this is the correct for your SaveToCSV function : ( otherwise Null ...)
for (int i = 0; i < columnCount; i++)
Not :
for (int i = 1; (i - 1) < DGV.RowCount; i++)

This is what I been using in my projects:
void export_csv(string file, DataGridView grid)
{
using (StreamWriter csv = new StreamWriter(file, false))
{
int totalcolms = grid.ColumnCount;
foreach (DataGridViewColumn colm in grid.Columns) csv.Write(colm.HeaderText + ',');
csv.Write('\n');
string data = "";
foreach (DataGridViewRow row in grid.Rows)
{
if (row.IsNewRow) continue;
data = "";
for (int i = 0; i < totalcolms; i++)
{
data += (row.Cells[i].Value ?? "").ToString() + ',';
}
if (data != string.Empty) csv.WriteLine(data);
}
}
}