由DataSet导出生成excel的几种方法

1、当dataset中包含了html等特殊字符用这个处理

public void CreateExcel2(DataSet ds)
{
//创建一个excel application
Excel.Application xls_exp=null;
int rowindex=1;
int colindex=0;

//创建一个workbook,一个worksheet
Excel._Workbook xls_book=null;
Excel._Worksheet xls_sheet=null;
try
{
xls_exp = new Excel.ApplicationClass();
xls_book = xls_exp.Workbooks.Add(true);
xls_sheet = (Excel._Worksheet)xls_book.ActiveSheet;
//取得数据
//DataTable aa=GetData();
//将所得到的表的列名,赋值给单元格
foreach (DataColumn col in ds.Tables[0].Columns)
{
colindex++;

xls_exp.Cells[1, colindex] = col.ColumnName;
//水平对齐
xls_sheet.get_Range(xls_exp.Cells[1, colindex], xls_exp.Cells[1, colindex]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;
//垂直对齐
xls_sheet.get_Range(xls_exp.Cells[1, colindex], xls_exp.Cells[1, colindex]).VerticalAlignment = Excel.XlVAlign.xlVAlignCenter;

//行高、列宽自适应
//xls_sheet.Cells.Rows.AutoFill();
//xls_sheet.Cells.Columns.AutoFill();
}
//同样方法处理数据
foreach (DataRow row in ds.Tables[0].Rows)
{
rowindex++;
colindex = 0;

foreach (DataColumn col in ds.Tables[0].Columns)
{
colindex++;
switch (row[col.ColumnName].GetType().ToString())
{
//字符
case ("System.String"):

//数字格式设置为文本
xls_sheet.get_Range(xls_exp.Cells[rowindex, colindex], xls_exp.Cells[rowindex, colindex]).NumberFormatLocal = "@";

//水平对齐
xls_sheet.get_Range(xls_exp.Cells[rowindex, colindex], xls_exp.Cells[rowindex, colindex]).HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;
//垂直对齐
xls_sheet.get_Range(xls_exp.Cells[rowindex, colindex], xls_exp.Cells[rowindex, colindex]).VerticalAlignment = Excel.XlVAlign.xlVAlignCenter;
break;
//日期
case ("System.DateTime"):
//数字格式设置为yyyy-mm-dd hh:mm:ss日期
xls_sheet.get_Range(xls_exp.Cells[rowindex, colindex], xls_exp.Cells[rowindex, colindex]).NumberFormatLocal = "YYYY-MM-DD HH:MM:SS";
break;
}
//给cell赋值
xls_exp.Cells[rowindex, colindex] = row[col.ColumnName];

}
}
//不可见,即后台处理
xls_exp.Visible = true;
}
catch (Exception err)
{
//MessageBox.show(err.Message);
Page.ClientScript.RegisterStartupScript(this.GetType(), "mes", "alert('"+err.Message+"');", true);
}
}

2、

public void CreateExcel(DataSet ds)
{
HttpResponse resp = null;
resp = Page.Response;

resp.Clear();
resp.Buffer = true;

resp.Charset = "GB2312";

resp.ContentType = "application/ms-excel";
resp.AppendHeader("Content-Disposition", "attachment;filename=BleGgoods.xls" );

resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");

this.EnableViewState = false;

string colHeaders = "", ls_item = "";

//定义表对象与行对象，同时用DataSet对其值进行初始化
DataTable dt = ds.Tables[0];
DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的
int i = 0;
int cl = dt.Columns.Count;

//取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车符
for (i = 0; i < cl; i++)
{
if (i == (cl - 1))//最后一列，加\n
{
colHeaders += dt.Columns[i].Caption.ToString() + "\n";
}
else
{
colHeaders += dt.Columns[i].Caption.ToString() + "\t";
}

}
resp.Write(colHeaders);
//向HTTP输出流中写入取得的数据信息

//逐行处理数据
foreach (DataRow row in myRow)
{
//当前行数据写入HTTP输出流，并且置空ls_item以便下行数据
for (i = 0; i < cl; i++)
{
if (i == (cl - 1))//最后一列，加\n
{
ls_item += "'"+row[i].ToString() + "\n";
}
else
{
ls_item += "'"+row[i].ToString() + "\t";
}

}
resp.Write(ls_item);
ls_item = "";

}

resp.Flush();
resp.End();
}

3、

public void CreateCsv(DataSet ds)
{
string output=string.Empty;
ArrayList myOutput = new ArrayList();
if (ds.Tables[0].Rows.Count > 0)
{
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
output = "\t" + ds.Tables[0].Rows[i][0].ToString() + "," + ds.Tables[0].Rows[i][1].ToString()+",";
output += ds.Tables[0].Rows[i][2].ToString() + "," + ds.Tables[0].Rows[i][3].ToString()+",";
output += ds.Tables[0].Rows[i][4].ToString() + "," + ds.Tables[0].Rows[i][5].ToString() + ",";
output += ds.Tables[0].Rows[i][6].ToString() + "," + ds.Tables[0].Rows[i][7].ToString() + ",";
output += ds.Tables[0].Rows[i][8].ToString();

myOutput.Add(output);
}

Response.Clear();
Response.ClearHeaders();
Response.Buffer = true;
Response.Charset = "GB2312";

Response.AppendHeader("Content-Disposition", "attachment;filename=BleGoods.csv");

Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文

Response.ContentType = "text/csv";//设置输出文件类型为text文件。
this.EnableViewState = false;
System.Collections.IEnumerator myEnumerator = myOutput.GetEnumerator();
while (myEnumerator.MoveNext())
Response.Write(myEnumerator.Current.ToString());
Response.Flush();
Response.End();
}

}