这里提供了两种将DataGridView内容导出到Excel文件的方法。

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方法1：

/// 

/// 在没有安装Excel的情况下，将DataGridView数据导出到Excel
/// 
private void ExportToExcel()
{
    SaveFileDialog saveFileDialog = new SaveFileDialog();
    saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
    saveFileDialog.FilterIndex = 0;
    saveFileDialog.RestoreDirectory = true;
    saveFileDialog.CreatePrompt = true;
    saveFileDialog.Title = "导出到Excel";
    saveFileDialog.ShowDialog();
    if (saveFileDialog.FileName == "")
    {
        return;
    }
    Stream myStream = saveFileDialog.OpenFile();
    StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
    string str = "";
    try
    {
        for (int i = 0; i < dataGridView1.ColumnCount; i++)
        {
            if (dataGridView1.Columns[i].Visible == false || dataGridView1.Columns[i].DataPropertyName == "")
            {
                continue;
            }
            str += dataGridView1.Columns[i].HeaderText;
            str += "\t";
        }
        sw.WriteLine(str);
        for (int j = 0; j < dataGridView1.Rows.Count - 1; j++)
        {
            string strTemp = "";
            for (int k = 0; k < dataGridView1.Columns.Count; k++)
            {
                if (dataGridView1.Columns[k].Visible == false || dataGridView1.Columns[k].DataPropertyName == "")
                {
                    continue;
                }
                object obj = dataGridView1.Rows[j].Cells[k].Value;
                if (obj != null)
                {
                    strTemp += dataGridView1.Rows[j].Cells[k].Value.ToString();
                }
                else
                {
                    strTemp = "";
                }
                strTemp += "\t";
            }
            sw.WriteLine(strTemp);
        }
        sw.Close();
        myStream.Close();
        MessageBox.Show("成功导出到Excel文件：\n" + saveFileDialog.FileName);
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }
    finally
    {
        sw.Close();
        myStream.Close();
    }
}

方法2：

/// 

/// 将DataGrirdView数据导出到Excel
/// 需要引用Microsoft.Office.Interop.Excel.dll模块
/// 
/// 
/// 
/// 
private bool DataGridviewShowToExcel(DataGridView dgv, bool bShowExcel)
{
    if (dgv.Rows.Count == 0)
    {
        return false;
    }
    //建立Excel对象      
    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
    excel.Application.Workbooks.Add(true);
    excel.Visible = bShowExcel;
    //生成字段名称    
    int k = 0;
    for (int i = 0; i < dgv.ColumnCount; i++)
    {
        if (dgv.Columns[i].Visible == false || dataGridView1.Columns[i].DataPropertyName == "")
        {
            k++;
            continue;
        }
        excel.Cells[1, i + 1 - k] = dgv.Columns[i].HeaderText;
    }
    //填充数据     
    for (int i = 0; i < dgv.RowCount; i++)
    {
        k = 0;
        for (int j = 0; j < dgv.ColumnCount; j++)
        {
            if (dgv.Columns[j].Visible == false || dataGridView1.Columns[j].DataPropertyName == "")
            {
                k++;
                continue;
            }
            excel.Cells[i + 2, j + 1 - k] = dgv[j, i].Value.ToString();
        }
    }
    return true;
}

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