数据集输出至Excel问题

Question

我使用下面的代码的输出数据从多个表中我的数据库到Excel文件：

Protected void btnExcelExport_Click(object sender, EventArgs e) 
{ 

string strQuery = "SELECT s.Story, s.StoryCategoryID, CONVERT(VARCHAR(10), 
s.CreationDate, 103) AS CreationDate, m.CompanyRole, af.Name FROM Story s INNER JOIN  
ProjectIterationMember pm ON pm.ProjectIterationMemberID = s.ProjectIterationMemberID 
INNER JOIN Iterations i ON i.ProjectIterationID = pm.ProjectIterationID INNER JOIN 
Member m ON m.MemberID = pm.MemberID INNER JOIN ProjectStoryFactors psf ON psf.StoryID = 
s.StoryID INNER JOIN AgileFactors af ON af.AgileFactorID = psf.AgileFactorID WHERE 
i.ProjectID = '" + proj_id + "'"; 

SqlCommand cmd = new SqlCommand(strQuery); 
DataTable dt = GetData(cmd); 

GridView GridView1 = new GridView(); 
GridView1.AllowPaging = false; 
GridView1.DataSource = dt; 
GridView1.DataBind(); 

Response.Clear(); 
Response.Buffer = true; 
Response.AddHeader("content-disposition","attachment;filename=RetroCloud" + 
DateTime.Now.Ticks + ".xls"); 
Response.Charset = ""; 
Response.ContentType = "application/vnd.ms-excel"; 
StringWriter sw = new StringWriter(); 
HtmlTextWriter hw = new HtmlTextWriter(sw); 

for (int i = 0; i < GridView1.Rows.Count; i++) 
{ 

    GridView1.Rows[i].Attributes.Add("class", "textmode"); 
} 
GridView1.RenderControl(hw); 

string style = @"<style> .textmode { mso-number-format:\@; } </style>"; 
Response.Write(style); 
Response.Output.Write(sw.ToString()); 
Response.Flush(); 
Response.End(); 

输出如下：

Story | StoryCategoryID | CreationDate | CompanyRole | Name 

negative iii | 1 | 21/02/2011 | Business Analyst | Project Duration 
negative iii | 1 | 21/02/2011 | Business Analyst | Team Size 
negative iii | 1 | 21/02/2011 | Business Analyst | Process 
negative ccc | 1 | 22/02/2011 | Admin | Workspace Layout 
negative ccc | 1 | 22/02/2011 | Admin | Organisational and Reporting Structure 
negative ccc | 1 | 22/02/2011 | Admin | Process 

我想这样做的两件事情。示例代码，将不胜感激 - 这是wreching我的头！非常感谢您的帮助！

1）对于StoryCategoryID，如果1被检索 - 显示“否定”，并且如果0检索 - 显示“正”代替。

2）输出格式如下：

故事|故事类型|创建日期|公司角色|标记1 |标签2 |标签3

negative iii | 1 | 21/02/2011 | Business Analyst | Project Duration | Team Size | Process 
negative ccc | 1 | 22/02/2011 | Admin | Workspace Layout | Organisational | Process 

Answer 1

好吧，也许不是最好的解决办法，但是这可能会做你想要什么：

SELECT 
    Story 
, CASE StoryCategoryID WHEN 1 THEN 'Negative' WHEN 0 THEN 'Positive' ELSE CAST(StoryCategoryID as varchar(10)) as StoryCategoryID 
, CreationDate 
, CompanyRole 
, MAX(CASE WHEN Z.MinName = af2.Name THEN af2.Name ELSE '' END) as Tag1 
, MAX(CASE WHEN Z.MinName <> af2.Name AND Z.MaxName <> af2.Name THEN af2.Name ELSE '' END) as Tag2 
, MAX(CASE WHEN Z.MaxName = af2.Name THEN af2.Name ELSE '' END) as Tag3 
FROM (
SELECT 
    s.Story 
, s.StoryCategoryID 
, CONVERT(VARCHAR(10), s.CreationDate, 103) AS CreationDate 
, m.CompanyRole 
, af.AgileFactorID 
, MIN(af.Name) MinName 
, MAX(af.Name) MaxName 
FROM Story s 
INNER JOIN ProjectIterationMember pm 
ON pm.ProjectIterationMemberID = s.ProjectIterationMemberID 
INNER JOIN Iterations i 
    ON i.ProjectIterationID = pm.ProjectIterationID 
INNER JOIN Member m 
    ON m.MemberID = pm.MemberID 
INNER JOIN ProjectStoryFactors psf 
    ON psf.StoryID = s.StoryID 
INNER JOIN AgileFactors af 
    ON af.AgileFactorID = psf.AgileFactorID 
WHERE i.ProjectID = '" + proj_id + "'"; 
GROUP BY s.Story, s.StoryCategoryID, CONVERT(VARCHAR(10), s.CreationDate, 103), m.CompanyRole, af.AgileFactorID 
) Z 
INNER JOIN AgileFactors af2 
    ON af2.AgileFactorID = Z.AgileFactorID 
GROUP BY Story, StoryCategoryID, CreateDate, CompanyRole