helpsos
سه شنبه 17 مرداد 1391, 18:15 عصر
سلام
من از کد زیر برای اینکار استفاده می کنم ولی error می دهد
private void ExportToExcel(DataGrid gridview, string Name)
{
// creating Excel Application
Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
// creating new WorkBook within Excel application
Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
// creating new Excelsheet in workbook
Microsoft.Office.Interop.Excel._Worksheet worksheet = null;
// see the excel sheet behind the program
app.Visible = true;
// get the reference of first sheet. By default its name is Sheet1.
// store its reference to worksheet
worksheet = workbook.Sheets["Sheet1"];
worksheet = workbook.ActiveSheet;
// changing the name of active sheet
worksheet.Name = "ذخیره اطلاعات";
worksheet.DisplayRightToLeft = true;
// storing header part in Excel
for (int i = 1; i < gridview.Columns.Count + 1; i++)
{
worksheet.Cells[1, i] = gridview.Columns[i - 1].Header.ToString();
}
// storing Each row and column value to excel sheet
for (int i = 0; i < gridview.Items.Count - 1; i++)
{
for (int j = 0; j < gridview.Columns.Count; j++)
{
worksheet.Cells[i + 2, j + 1] = ((gridview.Columns[j].GetCellContent(gridview.Items[i]) as TextBlock).Text);
}
}
string time = DateTime.Now.ToString();
time = time.Replace(":", "");
time = time.Replace("/", "");
// save the application
workbook.SaveAs("C:\\" + Name + time + ".xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode. xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
// Exit from the application
//app.Quit();
}
این Error را می دهد:
Object reference not set to an instance of an object.
من از کد زیر برای اینکار استفاده می کنم ولی error می دهد
private void ExportToExcel(DataGrid gridview, string Name)
{
// creating Excel Application
Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
// creating new WorkBook within Excel application
Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
// creating new Excelsheet in workbook
Microsoft.Office.Interop.Excel._Worksheet worksheet = null;
// see the excel sheet behind the program
app.Visible = true;
// get the reference of first sheet. By default its name is Sheet1.
// store its reference to worksheet
worksheet = workbook.Sheets["Sheet1"];
worksheet = workbook.ActiveSheet;
// changing the name of active sheet
worksheet.Name = "ذخیره اطلاعات";
worksheet.DisplayRightToLeft = true;
// storing header part in Excel
for (int i = 1; i < gridview.Columns.Count + 1; i++)
{
worksheet.Cells[1, i] = gridview.Columns[i - 1].Header.ToString();
}
// storing Each row and column value to excel sheet
for (int i = 0; i < gridview.Items.Count - 1; i++)
{
for (int j = 0; j < gridview.Columns.Count; j++)
{
worksheet.Cells[i + 2, j + 1] = ((gridview.Columns[j].GetCellContent(gridview.Items[i]) as TextBlock).Text);
}
}
string time = DateTime.Now.ToString();
time = time.Replace(":", "");
time = time.Replace("/", "");
// save the application
workbook.SaveAs("C:\\" + Name + time + ".xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode. xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
// Exit from the application
//app.Quit();
}
این Error را می دهد:
Object reference not set to an instance of an object.