winfrom中dataGridView导出excel数据 前面的O丢失 怎么解决

以下是我的代码

public static void DataGridViewToExcel(DataGridView dgv)
{
//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)|*.xls ";
//默然路径是系统当前路径
//dlg.InitialDirectory = Directory.GetCurrentDirectory();
dlg.InitialDirectory = @"C:\Documents and Settings\Administrator\桌面";
//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 = dgv.Rows.Count;
int colscount = dgv.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;
}
}

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 <= dgv.ColumnCount - 1; i++)
{
if (dgv.Columns[i].Visible == true)
{
objExcel.Cells[1, displayColumnsCount] = dgv.Columns[i].HeaderText.Trim();
displayColumnsCount++;
}
}
//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 < dgv.RowCount; row++)
{
objExcel.Cells[row + 2, 1] = dgv.Rows[row].Cells[0].Value.ToString();
objExcel.Cells[row + 2, 2] = dgv.Rows[row].Cells[1].Value.ToString();
objExcel.Cells[row + 2, 3] = dgv.Rows[row].Cells[2].Value.ToString();
objExcel.Cells[row + 2, 4] = dgv.Rows[row].Cells[3].Value.ToString();

objExcel.Cells[row + 2, 5] = dgv.Rows[row].Cells[4].Value.ToString();
objExcel.Cells[row + 2, 6] = dgv.Rows[row].Cells[5].Value.ToString();
objExcel.Cells[row + 2, 7] = dgv.Rows[row].Cells[6].Value.ToString();
}
//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);


[解决办法]
Cells[row + 2, 5].NumberFormat = "text"之类的
[解决办法]
也可以
objExcel.Cells[row + 2, 4] = "'" + dgv.Rows[row].Cells[3].Value.ToString();

或者

objExcel.Cells[row + 2, 4] = "=\"" + dgv.Rows[row].Cells[3].Value.ToString() + "\"";

或者

objExcel.Cells[row + 2, 4] = "\"" + dgv.Rows[row].Cells[3].Value.ToString() + "\"";

总有一个方法是可以的


另外，首先保证你 的 dgv.Rows[row].Cells[3].Value 读取出来的带前面的0
[解决办法]