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水晶報表動態控制圖片顯示 Changing pictures dynamically in Crystal Report
專案需要在報表中根據條件動態顯示不同的簽名
查找了好多解決方案，一個比較簡單的方案：

後來在網路上找到幻想天空文章http://hi.baidu.com/awming520/blog/item/3a6ccc2ab082a924d52af11f.html
水晶報表動態載入圖片分為資料庫圖片和本地圖片。

首先建立水晶報表rpt檔案，方法還是採用xsd資料集的方式，簡便容易操作，記得將資料集中的相關欄位設為你想要在報表中呈現的欄位。比如說在內容左邊加入一個圖片，就將相應的圖片欄位拖放過去。能不能直接在水晶報表上新增一個圖片然後修改？我做了幾次實驗，好像都不得要領，所以還是放棄，走最老式的方式，先在資料庫中建立一個準備在水晶報表中使用到的欄位的表，然後再通過這張表建立資料集xsd檔案，再通過資料集建立水晶報表。雖然方法繞了路，但是絕對是可行的。

通過資料集建立dataset

            DataSet1.pictureTabDataTable pt = new DataSet1.pictureTabDataTable();            DataSet1TableAdapters.pictureTabTableAdapter da =                new
 
 DataSet1TableAdapters.pictureTabTableAdapter();            da.Fill(pt);            CrystalReport1 cr = new CrystalReport1();            cr.SetDataSource((DataTable)pt);            this.crystalReportViewer1.ReportSource = cr;

表名叫做pictureTab，因此建立的資料集有表pictureTabDataTable類和介面卡pictureTabTableAdapter，奇怪的是前面的名稱空間，著實沒有找到，不過無關要害。

通過資料庫建立Dataset

            SqlConnection conn = new SqlConnection("Data Source=(Local);Initial Catalog=MyDB;User ID=sa;Password=yamato");            SqlDataAdapter da = new SqlDataAdapter("select * from pictureTab where name ='e'", conn);            DataSet ds = new DataSet();            da.Fill(ds, "NewTable");            CrystalDecisions.CrystalReports.Engine.ReportDocument doc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();            doc.Load(@"C:/Documents and Settings/jiez/桌面/CrystalReportsApplication1/CrystalReportsApplication1/CrystalReport1.rpt");            doc.SetDataSource(ds.Tables["NewTable"]);            this.crystalReportViewer1.ReportSource = doc;

這個其實也沒什麼好說的，只是修改了一下報表載入的方式而已。

厲害的來了，本地圖片載入

            DataSet ds = new DataSet();            ds.Tables.Add("NewTable");            ds.Tables[0].Columns.Add("id", Type.GetType("System.Int32"));            ds.Tables[0].Columns.Add("picture", Type.GetType("System.Byte[]"));            ds.Tables[0].Columns.Add("name", Type.GetType("System.String"));            string picPath = @"C:/Documents and Settings/jiez/My Documents/My Pictures/logo.jpg";            AddOneRow(ds.Tables["NewTable"], "1", picPath, "Jackey");            CrystalDecisions.CrystalReports.Engine.ReportDocument doc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();            doc.Load(@"C:/Documents and Settings/jiez/桌面/CrystalReportsApplication1/CrystalReportsApplication1/CrystalReport1.rpt");            doc.SetDataSource(ds.Tables["NewTable"]);            this.crystalReportViewer1.ReportSource = doc;        public void AddOneRow(DataTable tbl, string c1, string c2, string c3)        {            FileStream fs = new FileStream(c2, FileMode.Open);            BinaryReader br = new BinaryReader(fs);            DataRow row = tbl.NewRow();            row[0] = c1;            row[2] = c3;            row[1] = br.ReadBytes((int)br.BaseStream.Length);            tbl.Rows.Add(row);        }

這裡自己建立了一個dataset，並且往裡面添加了資料，都是自己進行設定，這樣靈活性就很高了，要注意的是這裡的資料讀取採用的是BinaryReader直接就用二進位制的方式進行了讀取。
是可以實現的.
註釋:1.AddOneRow 函式中並沒有關閉資料流 fs1.Close();fs2.Close();
   

public void AddOneRow(DataTable tbl, string c1, string c2, string c3)    {        FileStream fs1 = new FileStream(c2, FileMode.Open);        FileStream fs2 = new FileStream(c3, FileMode.Open);        BinaryReader br1 = new BinaryReader(fs1);        BinaryReader br2 = new BinaryReader(fs2);                DataRow row = tbl.NewRow();        row[1] = br1.ReadBytes((int)br1.BaseStream.Length);        row[2] = br2.ReadBytes((int)br2.BaseStream.Length);        tbl.Rows.Add(row);        fs1.Close();        fs2.Close();    }    protected void Page_Load(object sender, EventArgs e)    {         //sql         SqlConnection conn = new SqlConnection(PublicVar.strCon_SHATDB);         SqlDataAdapter da = new SqlDataAdapter("select * from stamp ", conn);         DataSet ds = new DataSet();         da.Fill(ds, "NewTable");         //儲存過程取得ds                 SqlParameter[] parms = new SqlParameter[1];         parms[0] = new SqlParameter("@id", SqlDbType.Int);         parms[0].Value = 2; //部門         DataSet ds = new DataSet();         ds = DataAccess.DataAccessSHDB.GetTableByStore("test3", parms).DataSet;         //DataSet ds = new DataSet();                  string picPath1 = @"C:/test/1.jpg";         string picPath2 = @"C:/test/2.jpg";                  AddOneRow(ds.Tables[0], "1", picPath1, picPath2);         CrystalDecisions.CrystalReports.Engine.ReportDocument doc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();         doc.Load(@"C:/test/1.rpt");//報表已經設定簽名的image欄位         doc.SetDataSource(ds.Tables[0]);         CrystalReportViewer1.ReportSource = doc;         CrystalReportViewer1.DataBind();             }

後來我根據思路重構了一下
報表的dataset中設定需要簽名的欄位一定要是IMAGE 路徑儲存在資料中  

public void AddOneRow(DataTable tbl, string c1, string c2, string c3, string c4, string c5,string c6,string c7)    {        //FileStream fs1 = new FileStream(c2, FileMode.Open);        //FileStream fs2 = new FileStream(c3, FileMode.Open);        //BinaryReader br1 = new BinaryReader(fs1);        //BinaryReader br2 = new BinaryReader(fs2);        //DataRow row = tbl.NewRow();        //row[0] = c1;        //row[0] = br1.ReadBytes((int)br1.BaseStream.Length);        //row[1] = br2.ReadBytes((int)br2.BaseStream.Length);        //fs1.Close();        //fs2.Close();        //tbl.Rows.Add(row);        for (int i = 0; i < tbl.Rows.Count; i++) //如果在頭部那麼第一行就夠了 如果在尾部最後一行就OK 如果在Group 中就必須所有行        {            FileStream fs1 = new FileStream(c1, FileMode.Open);            FileStream fs2 = new FileStream(c2, FileMode.Open);            FileStream fs3 = new FileStream(c3, FileMode.Open);            FileStream fs4 = new FileStream(c4, FileMode.Open);            FileStream fs5 = new FileStream(c5, FileMode.Open);            FileStream fs6 = new FileStream(c6, FileMode.Open);            FileStream fs7 = new FileStream(c7, FileMode.Open);            BinaryReader br1 = new BinaryReader(fs1);            BinaryReader br2 = new BinaryReader(fs2);            BinaryReader br3 = new BinaryReader(fs3);            BinaryReader br4 = new BinaryReader(fs4);            BinaryReader br5 = new BinaryReader(fs5);            BinaryReader br6 = new BinaryReader(fs6);            BinaryReader br7 = new BinaryReader(fs7);                        tbl.Rows[i][0] = br1.ReadBytes((int)br1.BaseStream.Length);            tbl.Rows[i][1] = br2.ReadBytes((int)br2.BaseStream.Length);            tbl.Rows[i][2] = br3.ReadBytes((int)br3.BaseStream.Length);            tbl.Rows[i][3] = br4.ReadBytes((int)br4.BaseStream.Length);            tbl.Rows[i][4] = br5.ReadBytes((int)br5.BaseStream.Length);            tbl.Rows[i][5] = br6.ReadBytes((int)br6.BaseStream.Length);            tbl.Rows[i][6] = br7.ReadBytes((int)br7.BaseStream.Length);            fs1.Close();            fs2.Close();            fs3.Close();            fs4.Close();            fs5.Close();            fs6.Close();            fs7.Close();            //tbl.Rows.Add(row);        }    }    private void CrystalReportDataBind(int id)     {        SqlParameter[] parms = new SqlParameter[1];        parms[0] = new SqlParameter("@id", SqlDbType.Int);        parms[0].Value = id; //部門        DataSet ds = new DataSet();        ds = DataAccess.DataAccessSHDB.GetTableByStore("project", parms).DataSet;        //以下部分是讀取本地圖片        string strURL ="select u.stamp_path from taskline tl left join users u on tl.UserID=u.[ID] where taskcode='"+lbl_taskcode.Text+"' and TurnTo='1' AND Result='Y' ";        string[] picPath=new string[7];         for(int i=0;i<=6;i++)        {            if (string.IsNullOrEmpty(PublicFunction.StringGetValue(strURL + " and taskline=" + (i + 1), 0)) == false) //取得已經審批人的本地簽名地址            {                 //picPath[i] = "@" + PublicFunction.StringGetValue(strURL + " and taskline=" + (i + 1), 0);                //string urlPath = Server.MapPath("..//Reports//"+PublicFunction.StringGetValue(strURL + " and taskline=" + (i + 1), 0));//無法動態解析伺服器地址                picPath[i] = PublicFunction.StringGetValue(strURL + " and taskline=" + (i + 1), 0); //儲存本地地址            }            else             {                switch (i)                 {                    case 0:                       picPath[i] = @"C:/stamp/空白1.jpg";  //空白地址頁面 防止程序同時被佔用                       break;                   case 1:                       picPath[i] = @"C:/stamp/空白2.jpg";                       break;                   case 2:                       picPath[i] = @"C:/stamp/空白3.jpg";                       break;                   case 3:                       picPath[i] = @"C:/stamp/空白4.jpg";                       break;                   case 4:                       picPath[i] = @"C:/stamp/空白5.jpg";                       break;                   case 5:                       picPath[i] = @"C:/stamp/空白6.jpg";                       break;                   case 6:                       picPath[i] = @"C:/stamp/空白7.jpg";                       break;                }                            }                    }                //string picPath1 = @"C:/test/2.jpg";        //string picPath2 = @"C:/test/2.jpg";        AddOneRow(ds.Tables[0], picPath[0], picPath[1], picPath[2], picPath[3], picPath[4], picPath[5], picPath[6]);        CrystalDecisions.CrystalReports.Engine.ReportDocument doc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();        string reportPath = Server.MapPath("..//Reports//project.rpt");        //doc.Load(@"C:/test/1.rpt");        doc.Load(reportPath);        doc.SetDataSource(ds.Tables[0]);        CrystalReportViewer1.ReportSource = doc;        CrystalReportViewer1.DataBind();             } 

效果圖:

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