excel文件主要是输出html代码。以xls的文本格式保存文件。
生成excel格式的代码：
[code lang="CSharp"]
/// <summary>
/// 输出excel格式的html代码
/// </summary>
/// <param name="dt"></param>
/// <param name="fileName"></param>
/// <param name="tableHeader"></param>
/// <param name="UseDefinedHeader"></param>
/// <returns></returns>
public string MakeExcelStr(DataTable dt, string fileName, string[] tableHeader,bool UseDefinedHeader)
{
StringBuilder strResult = new StringBuilder();
int iColCount = dt.Columns.Count;
if (dt.Columns.Count == 0)
return strResult.ToString();
strResult.Append("<table cellspacing=\"0\" cellpadding=\"5\" rules=\"all\" border=\"1\">");
strResult.Append("<tr style=\"font-weight: bold; white-space: nowrap;\">");
if (UseDefinedHeader)//是否是用户自定义表头
{
for (int i = 0; i < tableHeader.Length; i++)
{
strResult.Append("<td style=\"text-align:center\">" + tableHeader[i] + "</td>");//让文本居中显示
}
}
else
{
for (int i = 0; i < iColCount; i++)
{
strResult.Append("<td style=\"text-align:center\">" + (dt.Columns[i] + "").ToString() + "</td>");
}
}
strResult.Append("</tr>");
foreach (DataRow dr in dt.Rows)
{
strResult.Append("<tr>");
for (int i = 0; i < iColCount; i++)
{
// style=\"vnd.ms-excel.numberformat:@\"
strResult.Append("<td style=\"vnd.ms-excel.numberformat:@\">'" + (dr[i] + "").ToString() + "</td>");//设置单元格是文本格式（防止文本是科学计算法，即E+***这种情况）
}
strResult.Append("</tr>");
}
strResult.Append("</table>");
return strResult.ToString();
}
[/code]
把生成的excel格式的代码保存成excel文件的方法
[code lang="CSharp"]
/// <summary>
/// 导出excel表格
/// </summary>
/// <param name="dt"></param>
/// <param name="fileName"></param>
/// <param name="tableHeader">表头</param>
/// <param name="Defined">是否自定义表头</param>
private void ExprotToExcel(DataTable dt, string fileName, string[] tableHeader, bool Defined)
{
DogManage.Common.ExcelHelper excelHelper = new DogManage.Common.ExcelHelper();
string result = excelHelper.MakeExcelStr(dt, fileName, tableHeader,Defined);
HttpContext.Current.Response.Clear();
System.IO.StringWriter sw = new System.IO.StringWriter();
sw.Write(result);
sw.Close();
string str2 = HttpUtility.UrlEncode(fileName + "_" + DateTime.Now.ToString("yyyy-MM-dd"));
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" +str2 + ".xls");
HttpContext.Current.Response.ContentType = "application/ms-excel";
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
HttpContext.Current.Response.Write(sw);
HttpContext.Current.Response.End();
}
[/code]
生成word的代码：
[code lang="CSharp"]
private void exportword()
{
Response.Clear();
Response.Buffer = true;
Response.Charset = "utf-8";
Response.AppendHeader("Content-Disposition", "attachment;filename=tmp.doc");
Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");
Response.ContentType = "application/ms-word";
this.EnableViewState = false;
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
oHtmlTextWriter.WriteLine(hf.Value);
Response.Write(oStringWriter.ToString());
Response.End();
}
[/code]
csv文件就是一个有特定格式的字符串拼接出来的文件，每个列通过,分割开来。换行则两外输出一行文本就行了
生成csv文件的代码：
[code lang="CSharp"]
/// <summary>
/// 输出csv文件的代码
/// </summary>
/// <param name="dt"></param>
/// <param name="fileName"></param>
/// <param name="tableHeader">表头</param>
/// <returns></returns>
public string MakeCSVStr(DataTable dt, string fileName, string[] tableHeader)
{
StringBuilder strResult = new StringBuilder();
string temp = string.Empty;
int iColCount = dt.Columns.Count;
if (iColCount == 0)
return strResult.ToString();
for (int i = 0; i < iColCount; i++)
{
temp+="\"" + dt.Columns[i] + "\"";
if (i < iColCount - 1)
temp+=",";
}
strResult.AppendLine(temp);
foreach (DataRow dr in dt.Rows)
{
temp = "";
for (int i = 0; i < iColCount; i++)
{
if (!Convert.IsDBNull(dr[i]))
temp+="\"" + dr[i].ToString() + "\"";
else
temp += "\"\"";
if (i < iColCount - 1)
temp+=",";
}
strResult.AppendLine(temp);
}
return strResult.ToString();
}
[/code]
导出csv文件的方法：
[code lang="CSharp"]
/// <summary>
/// 导出csv文件
/// </summary>
/// <param name="dt"></param>
/// <param name="fileName"></param>
/// <param name="tableHeader">表头</param>
/// <param name="Defined">是否自定义表头</param>
private void ExprotToCSV(DataTable dt,string fileName, string[] tableHeader)
{
DogManage.Common.ExcelHelper excelHelper = new DogManage.Common.ExcelHelper();
string result=excelHelper.MakeCSVStr(dt, fileName, tableHeader);
HttpContext.Current.Response.Clear();
System.IO.StringWriter sw = new System.IO.StringWriter();
sw.Write(result);
sw.Close();
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName + ".csv");
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
HttpContext.Current.Response.Write(sw);
HttpContext.Current.Response.End();
}
[/code]