winform打印和预览
在windows应用程序中文档的打印是一项非常重要的功能，在以前一直是一个非常复杂的工作,Microsoft .Net Framework的打印功能都以组件的方式提供，为程序员提供了很大的方便。由于工作中常用到印功功能，个人写了一个专门打印DataGridView对象一个类，可以实现预览和打印功能，而且自动缩放字段、添加颜色；在预览时可以根据不同的比例查看效果，可以查看第几页数据和直接打印第几页的 数据。请看效果图。
二、附上调用代码
三、提供源码：
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Drawing.Printing; 6 using System.Windows.Forms; 7 using System.Drawing; 8 using Dys.Component; 9 namespace Bll 10 { 11 /// <summary> 12 /// 打印 13 /// 开心懒人 14 /// 2014-10-10 15 /// </summary> 16 public class PrintDataGridView 17 { 18 19 static DataGridView dgv; 20 static string titleName = ""; //标题名称 21 static string titleName2 = ""; //第二标题名称 22 static int rowIndex = 0; //当前行 23 static int page = 1; //当前页 24 static int rowsPerPage = 0; //每页显示多少行 25 /// <summary> 26 /// 打印DataGridView 27 /// </summary> 28 /// <param name="dataGridView">要打印的DataGridView</param> 29 /// <param name="title">标题</param> 30 /// <param name="title2">第二标题,可以为null</param> 31 public static void Print(DataGridView dataGridView, string title, string title2) 32 { 33 try 34 { 35 if (dataGridView == null) { return; } 36 titleName = title; 37 titleName2 = title2; 38 dgv = dataGridView; 39 PrintPreviewDialog ppvw = new PrintPreviewDialog(); 40 ppvw.PrintPreviewControl.Zoom = 1.0; //显示比例为100% 41 PrintDocument printDoc = new PrintDocument(); 42 PrintDialog MyDlg = new PrintDialog(); 43 MyDlg.Document = printDoc; 44 printDoc.DefaultPageSettings.PaperSize = new PaperSize("A4", 850, 1000); 45 printDoc.DefaultPageSettings.Margins = new Margins(60, 60, 60, 60); //设置边距 46 ppvw.Document = printDoc; //设置要打印的文档 47 ((Form)ppvw).WindowState = FormWindowState.Maximized; //最大化 48 rowIndex = 0; //当前行 49 page = 1; //当前页 50 printDoc.PrintPage += new PrintPageEventHandler(printDoc_PrintPage); //打印事件 51 printDoc.EndPrint += new PrintEventHandler(printDoc_EndPrint); 52 ppvw.Document.DefaultPageSettings.Landscape = true; // 设置打印为横向 53 ppvw.ShowDialog(); //打开预览 54 55 } 56 catch (Exception ex) 57 { 58 MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); 59 } 60 61 } 62 63 static void printDoc_EndPrint(object sender, PrintEventArgs e) 64 { 65 rowIndex = 0; //当前行 66 page = 1; //当前页 67 rowsPerPage = 0;//每页显示多少行 68 } 69 private static void printDoc_PrintPage(object sender, PrintPageEventArgs e) 70 { 71 72 //标题字体 73 Font titleFont = new Font("微软雅黑", 16, FontStyle.Bold); 74 //标题尺寸 75 SizeF titleSize = e.Graphics.MeasureString(titleName, titleFont, e.MarginBounds.Width); 76 //x坐标 77 int x = e.MarginBounds.Left; 78 //y坐标 79 int y = Convert.ToInt32(e.MarginBounds.Top - titleSize.Height); 80 //边距以内纸张宽度 81 int pagerWidth = e.MarginBounds.Width; 82 //画标题 83 e.Graphics.DrawString(titleName, titleFont, Brushes.Black, x + (pagerWidth - titleSize.Width) / 2, y); 84 y += (int)titleSize.Height; 85 if (titleName2 != null && titleName2 != "") 86 { 87 88 //画第二标题 89 e.Graphics.DrawString(titleName2, dgv.Font, Brushes.Black, x + (pagerWidth - titleSize.Width) / 2 + 200, y); 90 //第二标题尺寸 91 SizeF titleSize2 = e.Graphics.MeasureString(titleName2, dgv.Font, e.MarginBounds.Width); 92 y += (int)titleSize2.Height; 93 94 } 95 96 //表头高度 97 int headerHeight = 0; 98 //纵轴上 内容与线的距离 99 int padding = 6; 100 //所有显示列的宽度 101 int columnsWidth = 0; 102 //计算所有显示列的宽度 103 foreach (DataGridViewColumn column in dgv.Columns) 104 { 105 106 //隐藏列返回 107 if (!column.Visible) continue; 108 //所有显示列的宽度 109 columnsWidth += column.Width; 110 } 111 112 //计算表头高度 113 foreach (DataGridViewColumn column in dgv.Columns) 114 { 115 116 //列宽 117 int columnWidth = (int)(Math.Floor((double)column.Width / (double)columnsWidth * (double)pagerWidth)); 118 //表头高度 119 int temp = (int)e.Graphics.MeasureString(column.HeaderText, column.InheritedStyle.Font, columnWidth).Height + 2 * padding; 120 if (temp > headerHeight) headerHeight = temp; 121 } 122 123 //画表头 124 125 foreach (DataGridViewColumn column in dgv.Columns) 126 { 127 128 //隐藏列返回 129 if (!column.Visible) continue; 130 //列宽 131 int columnWidth = (int)(Math.Floor((double)column.Width / (double)columnsWidth * (double)pagerWidth)); 132 //内容居中要加的宽度 133 float cenderWidth = (columnWidth - e.Graphics.MeasureString(column.HeaderText, column.InheritedStyle.Font, columnWidth).Width) / 2; 134 if (cenderWidth < 0) cenderWidth = 0; 135 //内容居中要加的高度 136 float cenderHeight = (headerHeight + padding - e.Graphics.MeasureString(column.HeaderText, column.InheritedStyle.Font, columnWidth).Height) / 2; 137 if (cenderHeight < 0) cenderHeight = 0; 138 //画背景 139 e.Graphics.FillRectangle(new SolidBrush(Color.LightGray), new Rectangle(x, y, columnWidth, headerHeight)); 140 //画边框 141 e.Graphics.DrawRectangle(Pens.Black, new Rectangle(x, y, columnWidth, headerHeight)); 142 ////画上边线 143 144 //e.Graphics.DrawLine(Pens.Black, x, y, x + columnWidth, y); 145 146 ////画下边线 147 148 //e.Graphics.DrawLine(Pens.Black, x, y + headerHeight, x + columnWidth, y + headerHeight); 149 150 ////画右边线 151 152 //e.Graphics.DrawLine(Pens.Black, x + columnWidth, y, x + columnWidth, y + headerHeight); 153 154 //if (x == e.MarginBounds.Left) 155 156 //{ 157 158 // //画左边线 159 160 // e.Graphics.DrawLine(Pens.Black, x, y, x, y + headerHeight); 161 162 //} 163 164 //画内容 165 e.Graphics.DrawString(column.HeaderText, column.InheritedStyle.Font, new SolidBrush(column.InheritedStyle.ForeColor), new RectangleF(x + cenderWidth, y + cenderHeight, columnWidth, headerHeight)); 166 x += columnWidth; 167 168 } 169 170 x = e.MarginBounds.Left; 171 y += headerHeight; 172 while (rowIndex < dgv.Rows.Count) 173 { 174 175 DataGridViewRow row = dgv.Rows[rowIndex]; 176 if (row.Visible) 177 { 178 179 int rowHeight = 0; 180 foreach (DataGridViewCell cell in row.Cells) 181 { 182 183 DataGridViewColumn column = dgv.Columns[cell.ColumnIndex]; 184 if (!column.Visible || cell.Value == null) continue; 185 int tmpWidth = (int)(Math.Floor((double)column.Width / (double)columnsWidth * (double)pagerWidth)); 186 int temp = (int)e.Graphics.MeasureString(cell.Value.ToString(), column.InheritedStyle.Font, tmpWidth).Height + 2 * padding; 187 if (temp > rowHeight) rowHeight = temp; 188 } 189 190 foreach (DataGridViewCell cell in row.Cells) 191 { 192 193 DataGridViewColumn column = dgv.Columns[cell.ColumnIndex]; 194 if (!column.Visible) continue; 195 int columnWidth = (int)(Math.Floor((double)column.Width / (double)columnsWidth * (double)pagerWidth)); 196 e.Graphics.DrawRectangle(Pens.Black, new Rectangle(x, y, columnWidth, rowHeight)); 197 198 if (cell.Value != null) 199 { 200 201 //内容居中要加的宽度 202 203 float cenderWidth = (columnWidth - e.Graphics.MeasureString(cell.Value.ToString(), cell.InheritedStyle.Font, columnWidth).Width) / 2; 204 205 if (cenderWidth < 0) cenderWidth = 0; 206 207 //内容居中要加的高度 208 209 float cenderHeight = (rowHeight + padding - e.Graphics.MeasureString(cell.Value.ToString(), cell.InheritedStyle.Font, columnWidth).Height) / 2; 210 211 if (cenderHeight < 0) cenderHeight = 0; 212 213 ////画下边线 214 215 //e.Graphics.DrawLine(Pens.Black, x, y + rowHeight, x + columnWidth, y + rowHeight); 216 217 ////画右边线 218 219 //e.Graphics.DrawLine(Pens.Black, x + columnWidth, y, x + columnWidth, y + rowHeight); 220 221 //if (x == e.MarginBounds.Left) 222 223 //{ 224 225 // //画左边线 226 227 // e.Graphics.DrawLine(Pens.Black, x, y, x, y + rowHeight); 228 229 //} 230 231 //画内容 232 233 e.Graphics.DrawString(cell.Value.ToString(), column.InheritedStyle.Font, new SolidBrush(cell.InheritedStyle.ForeColor), new RectangleF(x + cenderWidth, y + cenderHeight, columnWidth, rowHeight)); 234 235 } 236 237 x += columnWidth; 238 239 } 240 241 x = e.MarginBounds.Left; 242 243 y += rowHeight; 244 245 if (page == 1) rowsPerPage++; 246 247 //打印下一页 248 249 if (y + rowHeight > e.MarginBounds.Bottom) 250 { 251 252 e.HasMorePages = true; 253 254 break; 255 256 } 257 258 } 259 260 rowIndex++; 261 262 } 263 264 //页脚 265 string footer = " 第 " + page + " 页，共 " + Math.Ceiling(((double)dgv.Rows.Count / rowsPerPage)).ToString() + " 页"; 266 //画页脚 267 e.Graphics.DrawString(footer, dgv.Font, Brushes.Black, x + (pagerWidth - e.Graphics.MeasureString(footer, dgv.Font).Width) / 2, e.MarginBounds.Bottom); 268 page++; 269 270 } 271 272 273 } 274 275 }