Export DataGridview to Excel save working local but not save over network

[engahmedbarbary]

Problem

Export datagridview To Excel file on network folder not save but it save on local computer without problem .

version of Excel 2010 .

operating system is windows 7 .

VisualStudio version 2015

my code as below

my Function ExportExcel not save on network folder when click button Export why ???

public static void ExportExcel(string fileName, DataGridView myDGV)
{
if (myDGV.Rows.Count > 0)
{
string saveFileName = "";
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.DefaultExt = "xlsx";
saveDialog.Filter = "Excel file|*.xlsx";
saveDialog.FileName = fileName;
saveDialog.ShowDialog();
saveFileName = saveDialog.FileName;
if (saveFileName.IndexOf(":") < 0) return; //cancel
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
MessageBox.Show("can not create Excel file，make sure you installed Excel in your computer");
return;
}

Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//get sheet1

//Header
for (int i = 0; i < myDGV.ColumnCount; i++)
{
worksheet.Cells[1, i + 1] = myDGV.Columns.HeaderText;
}
//Content
for (int r = 0; r < myDGV.Rows.Count; r++)
{
for (int i = 0; i < myDGV.ColumnCount; i++)
{
worksheet.Cells[r + 2, i + 1] = myDGV.Rows[r].Cells.Value;
}
Application.DoEvents();
}
worksheet.Columns.EntireColumn.AutoFit();

if (saveFileName != "")
{
try
{
workbook.Saved = true;
workbook.SaveCopyAs(saveFileName);
}
catch (Exception ex)
{
MessageBox.Show("Error, the file might be opened\n" + ex.Message);
}
}
xlApp.Quit();
GC.Collect();
MessageBox.Show(fileName + "save successful", "prompt", MessageBoxButtons.OK);
}
else
{
MessageBox.Show("the datagridview is empty", "prompt", MessageBoxButtons.OK);
}
}
private void BtnExport_Click(object sender, EventArgs e)
{
string str = "WrongData" + DateTime.Now.ToString("dd-MM-yyyy");
ExportExcel(str, GridShowErrors);
}
Why Not Accept To save over network folder on another computer share but save locally on my computer

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