void DataGridViewToExcel(DataGridView dataGridView1)
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
saveFileDialog.FilterIndex = 0;
saveFileDialog.RestoreDirectory = true;
saveFileDialog.CreatePrompt = true;
saveFileDialog.Title = "保存为Excel文件";
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
Stream stream = saveFileDialog.OpenFile();
StreamWriter sw = new StreamWriter(stream, System.Text.Encoding.GetEncoding(-0));
string columnTitle = "";
try
{
for (int i = 0; i < dataGridView1.ColumnCount; i++)
{
if (i > 0)
{
columnTitle += "\t";//或者为逗号
}
columnTitle += dataGridView1.Columns[i].HeaderText;//写入列标题
}
sw.WriteLine(columnTitle);
for (int j = 0; j < dataGridView1.Rows.Count; j++)
{
string columnValue = "";
for (int k = 0; k < dataGridView1.Columns.Count; k++)
{
if (k > 0)
{
columnValue += "\t";
}
columnValue += dataGridView1.Rows[j].Cells[k].Value.ToString();
}
sw.WriteLine(columnValue);
}
sw.Close();
stream.Close();
}
finally
{
sw.Close();
stream.Close();
}
}
}
2、Web导出
不用存磁盘文件<iframe>导出。
string exportFileName = "Export" + DateTime.Now.ToString("yyyyMMddHHmmss");
System.Web.HttpContext context = System.Web.HttpContext.Current;
StringBuilder sb = new StringBuilder();
sb.Append("FirstName,LastName,PhoneNo.,State,TimeZone,ZipCode\n");
for (int i = 0; i < result.PhoneList.Count; i++)
{
sb.Append(result.PhoneList[i].FirstName + "," + result.PhoneList[i].LastName + "," + result.PhoneList[i].ZipCode + "\n");
}
StringWriter sw = new StringWriter(sb);//一定要StringWriter/StreamWriter才能直接导出
sw.Close();
context.Response.ClearHeaders();
context.Response.Clear();
context.Response.Charset = "UTF-8";
context.Response.ContentEncoding = System.Text.Encoding.UTF8;
context.Response.HeaderEncoding = System.Text.Encoding.UTF8;
context.Response.ContentType = "text/csv";
context.Response.BinaryWrite(new byte[] { 0xEF, 0xBB, 0xBF });//防止中文乱码
context.Response.Write(sw);
context.Response.AppendHeader("content-disposition", "attachment; filename=" + HttpUtility.UrlEncode("1.csv", System.Text.Encoding.UTF8).Replace("+", "%20"));
sw.Close();
context.Response.Flush();
context.Response.End();
二、利用LumenWorks.Framework.IO.Csv读取CSV文件
需要引用LumenWorks.Framework.IO.dll，读取的时候编码格式要选对，否则会乱码，表头自己设置
phatcher/CsvReader: Extended version of Sebastian Lorien's fast CSV Reader (github.com)
NuGet Gallery | LumenWorksCsvReader 4.0.0
static DataTable GetData(Stream stream)
{
using (stream)
{
using (StreamReader input = new StreamReader(stream, Encoding.GetEncoding("shift_jis")))
{
using (CsvReader csv = new CsvReader(input, false))
{
DataTable dt = new DataTable();
int columnCount = csv.FieldCount;
for (int i = 0; i < columnCount; i++)
{
dt.Columns.Add("col" + i.ToString());
}
while (csv.ReadNextRecord())
{
DataRow dr = dt.NewRow();
for (int i = 0; i < columnCount; i++)
{
if (!string.IsNullOrWhiteSpace(csv[i]))
{
dr[i] = csv[i];
}
}
dt.Rows.Add(dr);
}
return dt;
}
}
}
}
基本使用场景
using System.IO;
using LumenWorks.Framework.IO.Csv;
void ReadCsv()
{
// open the file "data.csv" which is a CSV file with headers
using (CsvReader csv =
new CsvReader(new StreamReader("data.csv"), true))
{
int fieldCount = csv.FieldCount;
string[] headers = csv.GetFieldHeaders();
while (csv.ReadNextRecord())
{
for (int i = 0; i < fieldCount; i++)
Console.Write(string.Format("{0} = {1};",
headers[i], csv[i]));
Console.WriteLine();
}
}
}
复杂的数据绑定方案（Windows窗体）
using System.IO;
using LumenWorks.Framework.IO.Csv;
void ReadCsv()
{
// open the file "data.csv" which is a CSV file with headers
using (CachedCsvReader csv = new
CachedCsvReader(new StreamReader("data.csv"), true))
{
// Field headers will automatically be used as column names
myDataGrid.DataSource = csv;
}
}
到此这篇关于C#导入和导出CSV文件的文章就介绍到这了。希望对大家的学习有所帮助，也希望大家多多支持软件开发网。