第八章 启动与执行业务流程（二）

于 2012-09-20 09:54:39 发布
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分类专栏： Workflow 软件知识 文章标签： datagrid dataset string 任务 asp button
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本文链接：https://blog.youkuaiyun.com/chclvzxx/article/details/7998899
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8.1 对业务过程定义的细化  

8.1.2 UpdateTaskDefinitionList.aspx文件代码   

    ......   

    <form id="Form1" method="post" runat="server">
      <table cellSpacing="0" cellPadding="0" width="100%" align="center" border="0">
       <tr><td style="FONT-SIZE: 16px" align="center">任务定义列表</td></tr>
       <tr height="50">
         <td align="right"><span id="Message" style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"

               runat="server" MaintainState="false"></span>&nbsp;</td>
       </tr>
       <tr>
       <td><asp:datagrid id="DataGrid1" runat="server"

                HeaderStyle-HorizontalAlign="Center" Width="100%" DataKeyField="TaskID"

                 AllowPaging="True" PageSize="6">
             <ItemStyle Font-Size="13px" HorizontalAlign="Center" Height="28px"

                   VerticalAlign="Bottom"></ItemStyle>
             <HeaderStyle Font-Size="16px" HorizontalAlign="Center" Height="30px"

                   VerticalAlign="Middle" BackColor="#EEEEEE"></HeaderStyle>
             <Columns>
             <asp:BoundColumn DataField="TaskName" HeaderText="任务名称"></asp:BoundColumn>
             <asp:BoundColumn DataField="role_name" HeaderText="关联角色"></asp:BoundColumn>
             <asp:BoundColumn DataField="ReadableFields" HeaderText="可读字段">
                 <ItemStyle HorizontalAlign="Left" Width="20%"></ItemStyle>
             </asp:BoundColumn>
             <asp:BoundColumn DataField="WritableFields" HeaderText="可编辑字段">
                 <ItemStyle HorizontalAlign="Left" Width="20%"></ItemStyle>
             </asp:BoundColumn>
             <asp:BoundColumn DataField="DueDate" HeaderText="任务完成期限(天数)">

             </asp:BoundColumn>
             <asp:HyperLinkColumn Text="编辑" DataNavigateUrlField="TaskID"

                    DataNavigateUrlFormatString="UpdateTaskDefinition.aspx?id={0}">

             </asp:HyperLinkColumn>
           </Columns>
           <PagerStyle Font-Size="9pt" HorizontalAlign="Right" ForeColor="#3366FF"

                    Mode="NumericPages"></PagerStyle>
         </asp:datagrid></td>
        </tr>
      </table>
    </form>

    ......

    UpdateTaskDefinitionList.aspx.cs文件代码：

    ......   

    using DataAccess;
    using WFEngine;

    namespace workflow.admin
    {
       public class UpdateTaskDefinitionList : System.Web.UI.Page
       {
          protected System.Web.UI.WebControls.DataGrid DataGrid1;
          protected System.Web.UI.HtmlControls.HtmlGenericControl Message;
 
          private void Page_Load(object sender, System.EventArgs e)
          {
             if(! IsPostBack)
             {
               //验证用户是否登录
               if(Session["userid"] == null)
                    Response.Redirect("./Message.aspx");
               string processid=Request.QueryString["id"].ToString();
               ViewState["processid"]=processid;
               BindGrid();
             }
          }

          void BindGrid()
          {
             string processid=ViewState["processid"].ToString();

             //根据过程定义编号获取该过程的所有任务节点定义
             DataSet ds=new ProcessDefinitionClass().GetProcessDefinitionByID(processid);
             DataGrid1.DataSource=ds;
             DataGrid1.DataBind();   
          }

          private void DataGrid1_ItemDataBound(object sender,

                System.Web.UI.WebControls.DataGridItemEventArgs e)
          {
             if( e.Item.ItemType == ListItemType.Item

                   ||  e.Item.ItemType == ListItemType.AlternatingItem)
             {
                e.Item.Cells[2].Attributes.Add("style","WORD-BREAK:break-all;

                        WORD-WRAP:break-word");
                e.Item.Cells[3].Attributes.Add("style","WORD-BREAK:break-all;

                        WORD-WRAP:break-word");
             }

          }

          private void DataGrid1_PageIndexChanged(object source,

                System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
          {
             DataGrid1.CurrentPageIndex=e.NewPageIndex;
             BindGrid();
          }
       }
    }

8.1.3 UpdateTaskDefinition.aspx文件代码   

    ......

    <form id="Form1" method="post" runat="server">
      <table cellSpacing="0" cellPadding="0" width="100%" align="center" border="0">
       <tr><td style="FONT-SIZE: 16px" align="center">定义业务流程任务</td></tr>
       <tr height="50"><td align="right">&nbsp;</td></tr>
       <tr>
         <td><asp:table id="Tbl" style="BORDER-RIGHT: 1px solid; BORDER-TOP: 1px solid;

                  BORDER-LEFT: 1px solid; BORDER-BOTTOM: 1px solid; FONT-FAMILY: 宋体;

                  BORDER-COLLAPSE: collapse" runat="server" border="1" Width="100%"

                   cellPadding="3" cellSpacing="0"></asp:table>

         </td>
       </tr>
      </table>
      <table height="100" cellSpacing="0" cellPadding="0" width="100%" border="0">
       <tr>
        <td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
        <td align="center">&nbsp;

          <asp:button id="Button1" runat="server" Text="保存当前任务"></asp:button>
          <asp:Label id="Label2" runat="server" ForeColor="Red"></asp:Label>

        </td>
       </tr>
      </table>
    </form>

    ......

    UpdateTaskDefinition.aspx.cs文件代码   

    ......  

    using System.Text.RegularExpressions;

    using DataAccess;
    using CommonTools;
    using WFEngine;

    namespace workflow.admin
    {
       public class UpdateTaskDefinition : System.Web.UI.Page
       {
          protected System.Web.UI.WebControls.Button Button1;
          protected System.Web.UI.WebControls.Label Label2;
          protected System.Web.UI.WebControls.Table Tbl;
 
          private void Page_Load(object sender, System.EventArgs e)
          {
   
             if(! IsPostBack)
             {
                //验证用户是否登录
                if(Session["userid"] == null)
                    Response.Redirect("./Message.aspx");
                string taskid1=Request.QueryString["id"].ToString();
                ViewState["taskid"]=taskid1;
             }
             //以下代码不能放在IsPostBack条件中,否则按钮方法不能正常找到动态加载的控件
             //接受参数任务定义ID
             string taskid=ViewState["taskid"].ToString();
             Base basecode=new Base();

             //设置提示信息为空
             Label2.Text="";

             //获取任务定义记录
             TaskDefinitionClass taskdef=new TaskDefinitionClass();
             DataSet ds=taskdef.GetTaskByID(taskid);

             //获取processID
             string processid=taskdef.GetProcessID(taskid);
             ViewState["processid"]=processid;

             //获取角色记录集
             string strSql="select RoleID,isnull(RoleName+'  '+(select Group_Name from

                  organization where Group_ID=OrganizationID),RoleName) as role_group

                    from RolesManagement";
             DataSet ds1=basecode.SQLExeDataSet(strSql);

             //根据流程定义ID获得流程关联的数据表名称,因为表名为"ower.tablename",所以要分割出

             //表的所有者和表名.
             string relatedtablename=new ProcessDefinitionClass().GetRelatedTable(processid); 
             string[] owertblname=new Tools().StringSplit(relatedtablename,".");
             string ower=owertblname[0];
             string tablename=owertblname[1];

             //根据关联表获得关联表的字段名及其中文描述.
             strSql="select * from RelatedTablesFields where TableName='"+tablename+"'

                  and TableOwer='"+ower+"'";
             DataSet ds3=basecode.SQLExeDataSet(strSql);

             //将关联表的字段名列表保存起来提供给保存任务按钮方法使用.
             ViewState["RelatedTablesFields"]=ds3;

             //任务名称编辑行
             TableRow tr=new TableRow();    
             TableCell tc=new TableCell();
             tc.Text="任务名称：";
             tc.HorizontalAlign=HorizontalAlign.Right;
             tr.Cells.Add(tc);

             tc=new TableCell();
             TextBox tx=new TextBox();
             tx.Columns=50;
             tx.ID="taskname";
             tx.Text=ds.Tables[0].Rows[0]["TaskName"].ToString();
             tc.Controls.Add(tx);
             tc.ColumnSpan=9;
             tr.Cells.Add(tc);

             Tbl.Rows.Add(tr);    
             //分配角色
             tr=new TableRow();
             tc=new TableCell();
             tc.Text="分配角色：";
             tc.HorizontalAlign=HorizontalAlign.Right;
             tr.Cells.Add(tc);

             tc=new TableCell();
             DropDownList roleList=new DropDownList();
             roleList.ID="roleList";
             roleList.DataTextField="role_group";
             roleList.DataValueField="RoleID";
             roleList.DataSource=ds1;    
             roleList.DataBind();
             //以下语句也可以正常使用
             //if(ds.Tables[0].Rows[0]["AssignedRole"] == DBNull.Value)

             //if(ds.Tables[0].Rows[0].IsNull(3))
             if(! ds.Tables[0].Rows[0].IsNull("AssignedRole"))
                  roleList.SelectedValue=ds.Tables[0].Rows[0]["AssignedRole"].ToString();
             tc.Controls.Add(roleList);
             tc.ColumnSpan=9;
             tr.Cells.Add(tc);

             Tbl.Rows.Add(tr);

             //有关附件
             tr=new TableRow();
             tc=new TableCell();
             tc.Text="有关附件：";
             tc.HorizontalAlign=HorizontalAlign.Right;
             tr.Cells.Add(tc);

             tc=new TableCell();
             DropDownList attachedList=new DropDownList();
             attachedList.ID="attachedList";
             ListItem item1=new ListItem("","");
             attachedList.Items.Add(item1);
             item1=new ListItem("可以上传附件","L");
             attachedList.Items.Add(item1);
             item1=new ListItem("可以浏览附件","R");
             attachedList.Items.Add(item1);
             item1=new ListItem("可以上传和浏览附件","LR");
             attachedList.Items.Add(item1);
             if(ds.Tables[0].Rows[0]["AboutAttached"] == DBNull.Value

                 || ds.Tables[0].Rows[0]["AboutAttached"].ToString().Trim() == "")
             attachedList.SelectedValue="";
             else
                attachedList.SelectedValue=

                      ds.Tables[0].Rows[0]["AboutAttached"].ToString().Trim();
             tc.Controls.Add(attachedList);
             tc.ColumnSpan=9;
             tr.Cells.Add(tc);

             Tbl.Rows.Add(tr);
             //<可读字段控件集>
             tr=new TableRow();
             tc=new TableCell();
             tc.Text="可读字段：";
             tc.HorizontalAlign=HorizontalAlign.Right;
             tr.Cells.Add(tc);

             //为每一个关联字段设置单选框,并将字段名作为它的ID.
             CheckBox chk=null;
             Label lb=null;
             for(int i=0;i<ds3.Tables[0].Rows.Count;i++)
             {
                //8个字段选择控件为一行
                if((i% 8) == 0 & i>0)
                {
                   //一行尾部加一列
                   tc=new TableCell();
                   tc.Text="&nbsp;&nbsp;&nbsp;";
                   tr.Cells.Add(tc);
                   //另起一行并加一列空白列
                   Tbl.Rows.Add(tr);
                   tr=new TableRow();
                   tc=new TableCell();
                   tr.Cells.Add(tc);
                }

                tc=new TableCell();
                tc.HorizontalAlign=HorizontalAlign.Right;
                lb=new Label();
                lb.Text=ds3.Tables[0].Rows[i]["FieldAlias"].ToString();
                tc.Controls.Add(lb);
                chk=new CheckBox();

                //为避免出现ID重复错误
                chk.ID=ds3.Tables[0].Rows[i]["FieldName"].ToString()+"_R";

                //如果是标识字段则默认钩选并不可编辑.
                if(ds3.Tables[0].Rows[i]["IsIdentity"].ToString() =="Y")

                {
                   chk.Checked=true;
                   chk.Enabled=false;
                }
                tc.Controls.Add(chk);
                tr.Cells.Add(tc);
              }      
              //最后一行列跨度设置为最大值.
              tc=new TableCell();
              tc.ColumnSpan=9;
              tr.Cells.Add(tc);

              Tbl.Rows.Add(tr);

              //如果记录中已有可读字段的内容,要分割字符串,得到字段名并设置对应控件的钩选.
              string readablefieldsstr="";
              if(ds.Tables[0].Rows[0]["ReadableFields"] !=DBNull.Value)
                  readablefieldsstr=ds.Tables[0].Rows[0]["ReadableFields"].ToString().Trim();
              if(readablefieldsstr != "")
              {
                 string[] refieldsarray=new Tools().StringSplit(readablefieldsstr,",");
                 for(int j=0;j<refieldsarray.Length;j++)
                 {
                    //由于字段名字符串最后多一个",",使得字符串数组多一行空白字串，所以要判断.
                    if(refieldsarray[j] !="")
                    {
                       chk=(CheckBox)this.FindControl(refieldsarray[j]+"_R");
                       if(chk !=null)//避免找不到指定的控件
                          chk.Checked=true;
                    }
                 }
              }
              ......（待续）

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