C# WinForm 尝试读取或写入受保护的内存。这通常指示其他内存已损坏。

C# WinForm 尝试读取或写入受保护的内存。这通常指示其他内存已损坏。

using (SaveFileDialog sfdTxt = new SaveFileDialog())
                {
                    sfdTxt.Filter = "txt文本文件(*.txt)|*.txt";
                    if (DialogResult.OK==sfdTxt.ShowDialog())
                    {
                       using (StreamWriter streamWriter = new StreamWriter(sfdTxt.FileName, System.Text.Encoding.Unicode))
                            {
                                for (int i = 0; i < this.dgvSale.Rows.Count; i++)
                                {
                                    streamWriter.WriteLine(this.dgvSale.Rows[i].Cells[3].Value.ToString() + " " + this.dgvSale.Rows[i].Cells[8].Value.ToString() + " " + this.dgvSale.Rows[i].Cells[10].Value.ToString());
                                }
                                streamWriter.Close();
                            } 
                   }
                    else
                    {
                        return;
                    }
                    txtStream.Dispose();
                }追问谢谢你的回答，但还是存在一样的问题。第二次修改datagridview的内容后再执行导出就会在if (sfdTxt.ShowDialog() == DialogResult.OK)这条语句出错：“尝试读取或写入受保护的内存。这通常指示其他内存已损坏”