C#中datagridview导出Excel中身份证号码用文本格式显示

Question

//利用Stream(流)的方式
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
saveFileDialog.FilterIndex = 0;
saveFileDialog.RestoreDirectory = true;
saveFileDialog.CreatePrompt = true;
saveFileDialog.Title = "导出Excel文件到";

DateTime now = DateTime.Now;
saveFileDialog.FileName = now.Year.ToString().PadLeft(2)
+ now.Month.ToString().PadLeft(2, '0')
+ now.Day.ToString().PadLeft(2, '0') + "-"
+ now.Hour.ToString().PadLeft(2, '0')
+ now.Minute.ToString().PadLeft(2, '0')
+ now.Second.ToString().PadLeft(2, '0');

saveFileDialog.ShowDialog();

Stream myStream;
myStream = saveFileDialog.OpenFile();
StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding("gb2312"));
string str = "";
try
{
//写标题
for (int i = 0; i < dataGridview1.ColumnCount; i++)
{
if (i > 0)
{
str += "\t";
}
str += dataGridview1.Columns[i].HeaderText;
}

sw.WriteLine(str);
//写内容
for (int j = 0; j < dataGridview1.Rows.Count; j++)
{
string tempStr = "";
for (int k = 0; k < dataGridview1.Columns.Count; k++)
{
if (k > 0)
{
tempStr += "\t";
}
tempStr += dataGridview1.Rows[j].Cells[k].Value.ToString();
}
sw.WriteLine(tempStr);
}
sw.Close();
myStream.Close();
MessageBox.Show("成功导出Excel");
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
finally
{
sw.Close();
myStream.Close();
}
}
//这是源代码
我要让身份证显示文本格式而不是科学计数法形式，求高手！

Answer 1

for (int k = 0; k < dataGridview1.Columns.Count; k++)
{
if (k > 0)
{
tempStr += "\t";
}
tempStr += dataGridview1.Rows[j].Cells[k].Value.ToString();
}

改成

for (int k = 0; k < dataGridview1.Columns.Count; k++)
{
if (k > 0)
{
tempStr += "\t";
}
if(k==4)//4是身份证号的位置
{
tempStr += "'"+dataGridview1.Rows[j].Cells[k].Value.ToString();
continue;
}
tempStr += dataGridview1.Rows[j].Cells[k].Value.ToString();
}

Answer 2

查看一下dataGridview1.Rows[j].Cells[k].Value.ToString();
这个取到的内容是否是你所需要的
规格话一下~
这一步 把3.50123E+17转换成你那需要的格式string

楼下的说法只是在已经生成的excel内更改

Answer 3

在你的身份证号前面加上单引号: ' ，呵，就可以以文本显示了

Answer 4

选中单元格，右键，“设置单元格格式”，“数字”选项卡，“文本”，OK！

此后将数字处理为文本格式本回答被提问者采纳