用WIN7 64位系统的进来下
我用Microsoft.Jet.OLEDB.4.0连接excel 在XP下正常 但是在WIN7 64位下连接失败
有人知道为什么吗?
[解决办法]
我的也是Win7 64bit系统，我可以连接。
#region 导出数据到Excel表格 DataGridView导出到Excel，有一定的判断性
private void buttonSaveToExcel_Click(object sender, EventArgs e)
{
#region 验证可操作性
//申明保存对话框
SaveFileDialog dlg = new SaveFileDialog();
//默然文件后缀
dlg.DefaultExt = "xls";
//文件后缀列表
dlg.Filter = "Excel文件(*.xls)
[解决办法]
*.xls";
//默然路径是系统当前路径
dlg.InitialDirectory = Directory.GetCurrentDirectory();
//打开保存对话框
if (dlg.ShowDialog() == DialogResult.Cancel)
{
return;
}
//返回文件路径
string fileNameString = dlg.FileName;
//验证strFileName是否为空或值无效
if(fileNameString.Trim() == " ")
{
return;
}
//定义表格内数据的行数和列数
int rowscount = dataGridView1.Rows.Count;
int colscount = dataGridView1.Columns.Count;
//行数必须大于0
if(rowscount <= 0)
{
MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
//列数必须大于0
if(colscount <= 0)
{
MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
//行数不可以大于65536
if(rowscount > 65536)
{
MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
//列数不可以大于255
if(colscount > 255)
{
MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
//验证以fileNameString命名的文件是否存在，如果存在删除它
FileInfo file = new FileInfo(fileNameString);
if(file.Exists)
{
try
{
file.Delete();
}
catch (Exception error)
{
MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
}
#endregion
Excel.Application objExcel = null;
Excel.Workbook objWorkbook = null;
Excel.Worksheet objsheet = null;
try
{
//申明对象
objExcel = new Microsoft.Office.Interop.Excel.Application();
objWorkbook = objExcel.Workbooks.Add(Missing.Value);
objsheet = (Excel.Worksheet)objWorkbook.ActiveSheet;
//设置EXCEL不可见
objExcel.Visible = false;
//向Excel中写入表格的表头
int displayColumnsCount = 1;
for(int i = 0; i <= dataGridView1.ColumnCount - 1; i++)
{
if(dataGridView1.Columns[i].Visible == true)
{
objExcel.Cells[1, displayColumnsCount] = dataGridView1.Columns[i].HeaderText.Trim();
displayColumnsCount++;
}
}
//设置excel表格居中
((Excel.Range)objsheet.Columns["A", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["B", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["C", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["D", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["E", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["F", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["G", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["H", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["I", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["J", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["K", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["L", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
((Excel.Range)objsheet.Columns["M", Type.Missing]).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
//设置excel表格列宽
((Excel.Range)objsheet.Columns["B",Type.Missing]).ColumnWidth = 16;
((Excel.Range)objsheet.Columns["C", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["D", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["E", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["F", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["G", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["H", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["I", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["J", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["K", Type.Missing]).ColumnWidth = 10;
((Excel.Range)objsheet.Columns["L", Type.Missing]).ColumnWidth = 10;
//设置进度条
//tempProgressBar.Refresh();
//tempProgressBar.Visible = true;
//tempProgressBar.Minimum=1;
//tempProgressBar.Maximum=dgv.RowCount;
//tempProgressBar.Step=1;
//向Excel中逐行逐列写入表格中的数据
for(int row = 0; row <= dataGridView1.RowCount - 1; row++)
{
//tempProgressBar.PerformStep();
displayColumnsCount = 1;
for(int col = 0; col < colscount; col++)
{
if(dataGridView1.Columns[col].Visible == true)
{
try
{
objExcel.Cells[row + 2, displayColumnsCount] = dataGridView1.Rows[row].Cells[col].Value.ToString().Trim();
displayColumnsCount++;
}
catch (Exception)
{
}
}
}
}
//隐藏进度条
//tempProgressBar.Visible = false;
//保存文件
objWorkbook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
Missing.Value, Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value,
Missing.Value, Missing.Value);
}
catch(Exception error)
{
MessageBox.Show(error.Message, "警告 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
finally
{
//关闭Excel应用
if(objWorkbook != null) objWorkbook.Close(Missing.Value, Missing.Value, Missing.Value);
if(objExcel.Workbooks != null) objExcel.Workbooks.Close();
if(objExcel != null) objExcel.Quit();
objsheet = null;
objWorkbook = null;
objExcel = null;
}
MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
#endregion