使用ADO.net将数据导出到Excel并提供下载[转]

同时请参看另2文档:
http://community.csdn.net/Expert/topic/4760/4760677.xml?temp=.7889063
http://community.csdn.net/Expert/topic/4787/4787630.xml?temp=.7903253
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public string DataTableToExcel(DataTable dt,string excelPath)
{
if(dt == null)
{
return "DataTable不能为空";
}

int rows = dt.Rows.Count;
int cols = dt.Columns.Count;
StringBuilder sb;
string connString;

if(rows == 0)
{
return "没有数据";
}

sb = new StringBuilder();
connString = string.Format(ConnectionString,excelPath);

//生成创建表的脚本
sb.Append("CREATE TABLE ");
sb.Append(dt.TableName + " ( ");

for(int i=0;i