Dev Express Report 学习总结（四）Dev Express 动态生成XRTable使用总结

1. XRTableCell常见属性

　 XRTableCell xrTableCell = new XRTableCell();

　 A. 字体及字体大小

xrTableCell.Font = new System.Drawing.Font("Arial", FontSize);

　 B. 内容是否可以换行

　 xrTableCell.WordWrap = False;

C. 文本对齐方式

　 xrTableCell.TextAlignment=DevExpress.XtraPrinting.TextAlignment.MiddleLeft;

D. 边框是否显示及边框宽度

xrTableCell.Borders = DevExpress.XtraPrinting.BorderSide.All;

xrTableCell.BorderWidth = 0.5F;

E. 宽度和高度

　 xrTableCell.WidthF = 30;

　 xrTableCell.HeightF = 30;

　 F. XRTableCell文本前景色

xrTableCell.ForeColor=Color.Red;

G. XRTableCell文本内容左右间隔；

　 DevExpress.XtraPrinting.PaddingInfo padRight= new DevExpress.XtraPrinting.PaddingInfo();
    padRight.Right = 4;

XRTableCell xrTableCell = new XRTableCell();
    xrTableCell.Padding = padRight;

2. xrTable合并单元格(主要针对旧版本)

在新做的一个页面要用到xrTable合并单元格。我先在Design界面加了一个GroupHeader，随后又在GroupHeader中放了一个XRPanel，最后在XRPanel放入由xrTable嵌套的实现合并XRTableCell的功能，最后导致每一页在切换到下一页时输入很奇怪的一条线，最后查了两三天才发现这个问题。后来经过确认其实不需要加XRPanel的，直接放入嵌套的xrTable就可以了，深刻的教训，值得深思！

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using DevExpress.XtraReports.UI;
using System.Drawing.Printing;
using System.Linq.Expressions;

namespace DevExpressConsole
{
    public partial class TrendAndReport : DevExpress.XtraReports.UI.XtraReport
    {
        public TrendAndReport()
        {
            InitializeComponent();
            PrintDocument();
        }

        private void PrintDocument()
        {
            float TotalWidth = this.PageWidth - this.Margins.Left - this.Margins.Right;
            float CellHeight = ;
            float CondtWidth = ;

            for (int i = ; i <= ; i++)
            {
                XRTable TableContainer = new XRTable();
                TableContainer.CanGrow = true;
                TableContainer.BeginInit();
                for(int j=;j<;j++)
                {
                    XRTableRow TCRow = new XRTableRow();
                    TCRow.CanGrow = true;

                    XRTableCell OrderNo = new XRTableCell();
                    OrderNo.CanGrow = true;
                    OrderNo.WidthF = TotalWidth - CondtWidth - ;
                    OrderNo.HeightF = CellHeight;
                    OrderNo.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;
                    OrderNo.ProcessDuplicates = DevExpress.XtraReports.UI.ValueSuppressType.Suppress;
                    OrderNo.Text = j +  + "";
                    OrderNo.WordWrap = true;
                    TCRow.Cells.Add(OrderNo);

                    XRTableCell Happy = new XRTableCell();
                    Happy.CanGrow = true;
                    Happy.WidthF = ;
                    Happy.HeightF = CellHeight;
                    Happy.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;
                    Happy.Text = "I am very happy with this! ";
                    Happy.WordWrap = true;
                    TCRow.Cells.Add(Happy);

                    XRTableCell HW = new XRTableCell();
                    HW.CanGrow = true;
                    HW.WidthF = ;
                    HW.HeightF = CellHeight;
                    HW.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;
                    HW.Text = "Hello World! ";
                    HW.WordWrap = true;
                    TCRow.Cells.Add(HW);

                    TableContainer.Rows.Add(TCRow);
                }
                TableContainer.KeepTogether = true;
                TableContainer.AdjustSize();
                TableContainer.EndInit();

                XRTable xrTab = new XRTable();
                xrTab.CanGrow = true;
                xrTab.BeginInit();
                xrTab.LocationF = new PointF(,  + TableContainer.HeightF * i);

                XRTableRow row = new XRTableRow();
                row.CanGrow = true;

                XRTableCell cell = new XRTableCell();
                cell.CanGrow = true;
                cell.Borders = DevExpress.XtraPrinting.BorderSide.All;
                cell.Controls.Add(TableContainer);
                cell.WidthF = TableContainer.WidthF;
                row.Cells.Add(cell);

                XRTableCell CONT = new XRTableCell();
                CONT.CanGrow = true;
                CONT.Text = "Cont'd";
                CONT.WidthF = CondtWidth;
                CONT.HeightF = TableContainer.HeightF;
                CONT.Angle = ;
                CONT.Borders = DevExpress.XtraPrinting.BorderSide.All;
                CONT.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;
                row.Cells.Add(CONT);

                GroupHeader1.Controls.Add(xrTab);
                xrTab.WidthF = TotalWidth;
                xrTab.HeightF = TableContainer.HeightF;
                xrTab.Rows.Add(row);
                xrTab.AdjustSize();
                xrTab.EndInit();
            }
        }
    }
}

3. xrTable分页

其实xrTable只要为每个表设置了LocationF属性，就会被自动挤到下一页，为了需要，还是做了一个例子进行确认：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using DevExpress.XtraReports.UI;
using System.Drawing.Printing;
using System.Linq.Expressions;

namespace DevExpressConsole
{
    public partial class TrendAndReport : DevExpress.XtraReports.UI.XtraReport
    {
        int k = ;
        public TrendAndReport()
        {
            InitializeComponent();
            while (k < )
            {
                PrintDocument();
            }
        }

        public void PrintDocument()
        {
            int EveryTabeNum = ;
            int TabPortaitSpan = ;

            XRTable xt = new XRTable();
            xt.CanGrow = true;
            xt.Borders = DevExpress.XtraPrinting.BorderSide.All;
            xt.BorderWidth = 0.5f;
            xt.BeginInit();
            XRTableRow xrow_header = new XRTableRow();
            XRTableCell xc_header = new XRTableCell();
            xc_header.Text = "DevExpress Page Break Usage -- Table" + (k + ).ToString();
            xc_header.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;
            xrow_header.Cells.Add(xc_header);
            xt.Rows.Add(xrow_header);
            for (int i = ; i < ; i++)
            {
                XRTableRow xrow = new XRTableRow();
                xrow.CanGrow = true;
                xrow.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;
                for (int j = ; j < ; j++)
                {
                    XRTableCell xc = new XRTableCell();
                    xc.HeightF = 25f;
                    if (i %  == )
                    {
                        if (i /  >= )
                        {
                            xc.Text = "ABCD";
                        }
                        else
                        {
                            xc.Text = DateTime.Now.ToShortDateString();
                        }
                    }
                    else
                    {
                        xc.CanGrow = true;
                        xc.Text = DateTime.Now.ToLocalTime().ToShortTimeString();
                    }
                    xrow.Cells.Add(xc);
                }
                if (i %  == )
                {
                    xrow.BackColor = Color.LightGray;
                }
                xt.Rows.Add(xrow);
            }
            xt.AdjustSize();
            xt.EndInit();
            xt.Font = new System.Drawing.Font(Font.FontFamily, 8f, FontStyle.Regular);
            //Setting the table position.
            xt.LocationF = new PointF(, TabPortaitSpan * k + xt.HeightF * k);
            Detail.Controls.Add(xt);
            xt.WidthF = this.PageWidth - this.Margins.Left - this.Margins.Right-;

            //Add page break for every EveryTabeNum tables.
            if ((k + ) % EveryTabeNum == )
            {
                XRPageBreak pb = new XRPageBreak();
                pb.LocationF = new PointF(, TabPortaitSpan * k + xt.HeightF * (k + ));
                Detail.Controls.Add(pb);
            }
            k++;
        }
    }
}

4. 动态改变xrTable的元素大小

xrTable元素的大小不是我们想的只要设置宽度和高度后会自动生效，它需要在xrTable.BeginInit()和TableContainer.AdjustSize();TableContainer.EndInit();的包裹之内执行，同时设置元素的属性CanGrow/CanShrink为True:

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using DevExpress.XtraReports.UI;
using System.Drawing.Printing;
using System.Linq.Expressions;

namespace DevExpressConsole
{
    public partial class TrendAndReport : DevExpress.XtraReports.UI.XtraReport
    {
        int k = ;
        public TrendAndReport()
        {
            InitializeComponent();
            PrintDocument();
        }

        public void PrintDocument()
        {
            int TabPortaitSpan = ;

            XRTable xt = new XRTable();
            xt.CanGrow = true;
            xt.Borders = DevExpress.XtraPrinting.BorderSide.All;
            xt.BorderWidth = 0.5f;
            xt.BeginInit();

            for (int i = ; i < ; i++)
            {
                XRTableRow xrow = new XRTableRow();
                xrow.CanGrow = true;
                xrow.HeightF = 50f;
                xrow.TextAlignment = DevExpress.XtraPrinting.TextAlignment.MiddleCenter;

                for (int j = ; j < ; j++)
                {
                    XRTableCell xc = new XRTableCell();
                    if (i %  == )
                    {
                        if (i /  >= )
                        {
                            xc.Text = "ABCD";
                        }
                        else
                        {
                            xc.Text = DateTime.Now.ToShortDateString();
                        }
                    }
                    else
                    {
                        xc.Text = DateTime.Now.ToLocalTime().ToShortTimeString();
                    }
                    xrow.Cells.Add(xc);
                }
                if (i %  == )
                {
                    xrow.BackColor = Color.LightGray;
                }
                xt.Rows.Add(xrow);
            }
            xt.AdjustSize();
            xt.EndInit();
            xt.Font = new System.Drawing.Font(Font.FontFamily, 8f, FontStyle.Regular);
            xt.LocationF = new PointF(, TabPortaitSpan * k + xt.HeightF * k);
            Detail.Controls.Add(xt);
            xt.WidthF = this.PageWidth - this.Margins.Left - this.Margins.Right-;
        }
    }
}

以下为设置前后的对比图：

设置前：

设置后：

5. 在XRTableCell.AdjustSize();XRTableCell.EndInit();前后设置XRTableCell宽度Width的区别

    在XRTableCell.AdjustSize();XRTableCell.EndInit();执行前设置XRTable的宽度，则XRTableCell的宽度会以当前设置的值为准，不会再发生变化，如下图所示：

在XRTableCell.AdjustSize();XRTableCell.EndInit();执行后设置XRTable的宽度，则XRTableCell的宽度会以当前XRTable的宽度为基准根据内容自动调整宽度，如下所示：

6. 需要注意的几点

　A. XRTable背景色可以通过整行去添加背景色，而不需要一个一个XRTableCell去设置：

　XRTableRow xrTableRow = new XRTableRow();

　xrTableRow.BackColor = Color.LightGray;

B. 设置XRTable的边框及颜色会覆盖xrTableRow和xrTableCell之前的设置，所以在设置时要从外到里进行设置。

7. 总结：

以上就是这次用递归动态生成XRTable时所领会到的经验和教训，特此总结，以便备用！