I have datatable and I am displaying those values in the datagridview with the helping of code :
dataGridView1.ColumnCount = TableWithOnlyFixedColumns.Columns.Count;
dataGridView1.RowCount = TableWithOnlyFixedColumns.Rows.Count;
for (int i = 0; i < dataGridView1.RowCount; i++)
{
for (int j = 0; j < dataGridView1.ColumnCount; j++)
{
dataGridView1[j, i].Value = TableWithOnlyFixedColumns.Rows[i][j].ToString();
}
}
TableExtractedFromFile.Clear();
TableWithOnlyFixedColumns.Clear();
Now I want to save the records in the datatable in csv file.How can I do that ?
You could do this:
// we'll use these to check for rows with nulls
var columns = yourTable.Columns
.Cast<DataColumn>();
// say the column you want to sort by is called "Date"
var rows = yourTable.Select("", "Date ASC"); // or "Date DESC"
using (var writer = new StreamWriter(yourPath)) {
for (int i = 0; i < rows.Length; i++) {
DataRow row = rows[i];
// check for any null cells
if (columns.Any(column => row.IsNull(column)))
continue;
string[] textCells = row.ItemArray
.Select(cell => cell.ToString()) // may need to pick a text qualifier here
.ToArray();
// check for non-null but EMPTY cells
if (textCells.Any(text => string.IsNullOrEmpty(text)))
continue;
writer.WriteLine(string.Join(",", textCells));
}
}
Related
I want to extract some data in the datatable, and want to send the email.
But when I extract the data, excel has many blanks between the extracted data.
The data which is not extracted make a blank row.
When I try to use RemoveRow() function, it doesn't work and still has a blank row.
private void Email()
{
//get the data from database
DataTable data = GetData();
int maxLavel = Convert.ToInt32(data.Compute("max([AssignedID])", string.Empty));
IWorkbook workbook;
workbook = new HSSFWorkbook();
for (int Emp = 0; Emp < maxLavel; Emp++)
{
ISheet sheet1 = workbook.CreateSheet("Sheet 1");
int num = 0;
//make a header row
IRow row1 = sheet1.CreateRow(0);
for (int j = 0; j < data.Columns.Count; j++)
{
ICell cell = row1.CreateCell(j);
String columnName = data.Columns[j].ToString();
cell.SetCellValue(columnName);
}
//loops through data
for (int i = 0; i < data.Rows.Count; i++)
{
IRow row = sheet1.CreateRow(i + 1);
if (Emp == Convert.ToInt32(data.Rows[i][0]))
{
num++;
ICell cell = row.CreateCell(j);
for (int j = 0; j < data.Columns.Count; j++)
{
sheet1.AutoSizeColumn(j); //control cell width
String columnName = data.Columns[j].ToString();
cell.SetCellValue(data.Rows[i][columnName].ToString());
}
}
else ///here has problems
{
var row = sheet1.GetRow(i);
//sheet1.RemoveRow(row);
sheet1.ShiftRows(i + 1, sheet1.LastRowNum + 1, -1);
}
}
if (num != 0)
{
//send email
}
}
}
I'm not sure why you need to resend the same file again with different contents instead of simply sending a different file, but could you perhaps try moving the creation of your sheet inside the for loop, and try removing the entire sheet instead? E.g. something like this:
private void Email()
{
//get the data from database
DataTable data = GetData();
int maxLavel = Convert.ToInt32(data.Compute("max([AssignedID])", string.Empty));
IWorkbook workbook;
workbook = new HSSFWorkbook();
for (int Emp = 0; Emp < maxLavel; Emp++)
{
ISheet sheet1 = workbook.CreateSheet("Sheet 1");
int num = 0;
//make a header row
IRow row1 = sheet1.CreateRow(0);
for (int j = 0; j < data.Columns.Count; j++)
{
ICell cell = row1.CreateCell(j);
String columnName = data.Columns[j].ToString();
cell.SetCellValue(columnName);
}
//loops through data
for (int i = 0; i < data.Rows.Count; i++)
{
IRow row = sheet1.CreateRow(i + 1);
if (Emp == Convert.ToInt32(data.Rows[i][0]))
{
num++;
for (int j = 0; j < data.Columns.Count; j++)
{
ICell cell = row.CreateCell(j);
sheet1.AutoSizeColumn(j); //control cell width
String columnName = data.Columns[j].ToString();
cell.SetCellValue(data.Rows[i][columnName].ToString());
}
}
}
if (num != 0)
{
//send email
}
workbook.remove(sheet1);
}
}
I figure it out..I don't need to remove the row.
IRow row = sheet1.CreateRow(i);
This should be changed.
for (int i = 0; i < data.Rows.Count; i++)
{
if (Emp == Convert.ToInt32(data.Rows[i][0]))
{
IRow row = sheet1.CreateRow(row_num);
num++; row_num++;
for (int j = 0; j < data.Columns.Count; j++)
{
ICell cell = row.CreateCell(j);
sheet1.AutoSizeColumn(j); //control cell width
String columnName = data.Columns[j].ToString();
cell.SetCellValue(data.Rows[i][columnName].ToString());
}
}
}
The problem is that I need to insert data into Excel from the collection several times using a single template for the entire collection.
using (var pckg = new ExcelPackage(new FileInfo(association.TemplatePath)))
{
var workSheet = pckg.Workbook.Worksheets[1];
var dataTable = WorksheetToDataTable(workSheet);
/*Some stuff*/
FindAndReplaceValue(workSheet, dictionary, row);
}
private DataTable WorksheetToDataTable(ExcelWorksheet oSheet)
{
int totalRows = oSheet.Dimension.End.Row;
int totalCols = oSheet.Dimension.End.Column;
DataTable dt = new DataTable(oSheet.Name);
DataRow dr = null;
for (int i = 1; i <= totalRows; i++)
{
if (i > 1) dr = dt.Rows.Add();
for (int j = 1; j <= totalCols; j++)
{
if (i == 1)
dt.Columns.Add((oSheet.Cells[i, j].Value ?? "").ToString());
else
dr[j - 1] = (oSheet.Cells[i, j].Value ?? "").ToString();
}
}
return dt;
}
First picture - My template. Second - First element of collection (with data, style, merging). Third - Other elements has only data
I just made copies of rows
for (int i = 0; i < invoiceList.Count; i++)
{
workSheet.Cells[1, 1, totalRows, totalCols].Copy(workSheet.Cells[i * totalRows + 1, 1]);
}
If you want to copy range just use :
workSheet.Cells["A1:I1"].Copy(workSheet.Cells["A4:I4"]);
I have the following code that should loop through all the rows in my DataGridView, and write all their cell values to a text file.
However, it outputs all the rows, but only the first cell of each one, and not the other three cells.
string file_name = "C:\\test1.txt";
var objWriter = new System.IO.StreamWriter(file_name);
int count = dgv.Rows.Count;
for (int row = 0; row < count; row++)
{
objWriter.WriteLine(dgv.Rows[row].Cells[0].Value.ToString());
}
objWriter.Close();
for (int row = 0; row < count; row++)
{
int colCount = dgv.Rows[row].Cells.Count;
for ( int col = 0; col < colCount; col++)
{
objWriter.WriteLine(dgv.Rows[row].Cells[col].Value.ToString());
}
// record seperator could be written here.
}
Although, it would be cleaner if you used a foreach loop.
TextWriter sw = new StreamWriter(#"D:\\file11.txt");
int rowcount = dataGridViewX1.Rows.Count;
for (int i = 0; i < rowcount - 1; i++)
{
sw.WriteLine(dataGridViewX1.Rows[i].Cells[0].Value.ToString());
}
sw.Close();
MessageBox.Show("Text file was created." );
How can I read data from DataGridView in C#? I want to read the data appear in Table. How do I navigate through lines?
something like
for (int rows = 0; rows < dataGrid.Rows.Count; rows++)
{
for (int col= 0; col < dataGrid.Rows[rows].Cells.Count; col++)
{
string value = dataGrid.Rows[rows].Cells[col].Value.ToString();
}
}
example without using index
foreach (DataGridViewRow row in dataGrid.Rows)
{
foreach (DataGridViewCell cell in row.Cells)
{
string value = cell.Value.ToString();
}
}
If you wish, you can also use the column names instead of column numbers.
For example, if you want to read data from DataGridView on the 4. row and the "Name" column.
It provides me a better understanding for which variable I am dealing with.
dataGridView.Rows[4].Cells["Name"].Value.ToString();
Hope it helps.
string[,] myGridData = new string[dataGridView1.Rows.Count,3];
int i = 0;
foreach(DataRow row in dataGridView1.Rows)
{
myGridData[i][0] = row.Cells[0].Value.ToString();
myGridData[i][1] = row.Cells[1].Value.ToString();
myGridData[i][2] = row.Cells[2].Value.ToString();
i++;
}
Hope this helps....
Code Example : Reading data from DataGridView and storing it in an array
int[,] n = new int[3, 19];
for (int i = 0; i < (StartDataView.Rows.Count - 1); i++)
{
for (int j = 0; j < StartDataView.Columns.Count; j++)
{
if(this.StartDataView.Rows[i].Cells[j].Value.ToString() != string.Empty)
{
try
{
n[i, j] = int.Parse(this.StartDataView.Rows[i].Cells[j].Value.ToString());
}
catch (Exception Ee)
{ //get exception of "null"
MessageBox.Show(Ee.ToString());
}
}
}
}
private void HighLightGridRows()
{
Debugger.Launch();
for (int i = 0; i < dtgvAppSettings.Rows.Count; i++)
{
String key = dtgvAppSettings.Rows[i].Cells["Key"].Value.ToString();
if (key.ToLower().Contains("applicationpath") == true)
{
dtgvAppSettings.Rows[i].DefaultCellStyle.BackColor = Color.Yellow;
}
}
}
I have datatable table like
id name address phoneno
1 abc kfjskl 798798
2 bcd kjdsfl 808909
3 899009
fjsh kjllkjl
5 jfkd
And I am displaying this value in the datagridview by code
dataGridView1.ColumnCount = Table.Columns.Count;
dataGridView1.RowCount = Table.Rows.Count;
for (int i = 0; i < dataGridView1.RowCount; i++)
{
for (int j = 0; j < dataGridView1.ColumnCount; j++)
{
dataGridView1[j, i].Value = Table.Rows[i][j].ToString();
}
}
Now I don't want to display row that has some missing value like If I will do that then the datagridview will look like
1 abc kfjskl 798798
2 bcd kjdsfl 808909
How can I do that ?
This will do what you need (I think):
dataGridView1.ColumnCount = Table.Columns.Count;
for (int i = 0; i < Table.Rows.Count; i++)
{
bool valueMissing = false;
DataGridViewRow row = new DataGridViewRow();
for (int j = 0; j < dataGridView1.ColumnCount; j++)
{
if (Table.Rows[i][j].ToString() == "")
{
valueMissing = true;
break;
}
else
{
row.Cells[j].Value = Table.Rows[i][j];
}
}
if (!valueMissing)
{
dataGridView1.Rows.Add(row);
}
}
This may need to be modified to check for null values in Table.Rows[i][i] (in addition to just checking for empty string values).
I think your best choice is to use a DataView between the DataGridView and the DataTable.
The DataView allows you to filter values using and expression without affecting to the original DataTable. To filter all empty columns you can create a view with this expression:
DataView view = new DataView(table);
view.RowFilter = "ISNULL(id, '') <> '' AND ISNULL(name, '') <> '' AND ISNULL(address, '') <> '' AND ISNULL(phoneno, '') <> ''";
The ISNULL function replaces a column value whit the specified string, if the column value is null. So the filter is replacing every NULL value with empty strings, so excluding NULL or Empty columns.
Then you can use this view to assing values to the grid, instead of using the datatable:
dataGridView1.ColumnCount = view.Columns.Count;
dataGridView1.RowCount = view.Rows.Count;
for (int i = 0; i < dataGridView1.RowCount; i++)
{
for (int j = 0; j < dataGridView1.ColumnCount; j++)
{
dataGridView1[j, i].Value = view.Rows[i][j].ToString();
}
}
Also instead of using loops to provide values to the grid, you can simply use databinding. It's much simpler:
dataGridView1.DataSource = view;
Hope it helps!
I'm not sure if I understand, but you could possibly use DataTable.Select to filter out any rows with missing values before you insert them in the datagrid.
Or otherwise, instead of using a for loop for the rows, just use a foreach loop on the rows in the table and add the rows one by one with dataGridView.Rows.Add(newRow).