DataGridView数据导出为Excel

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DataGridView数据导出为Excel
怎样把WinForm下的“DGV”里的绑定数据库后的数据导出到Excel中。

比如：在窗体里有个一“DGV”，DataGridView1，绑定了数据源，怎样把它里面的数据导出到Excel中？
```
用流保存成xls文件. 这种方法比较好,不用引用Excel组件.   下面是具体例子,可以参考
using System.IO;
       
        /// <summary>
        /// 另存新档按钮
        /// </summary>
 private void SaveAs() //另存新档按钮   导出成Excel
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            saveFileDialog.Filter = "Execl files (*.xls)|*.xls";
            saveFileDialog.FilterIndex = 0;
            saveFileDialog.RestoreDirectory = true;
            saveFileDialog.CreatePrompt = true;
            saveFileDialog.Title = "Export Excel File To";
            saveFileDialog.ShowDialog();
            Stream myStream;
            myStream = saveFileDialog.OpenFile();
            //StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding("gb2312"));
            StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
            string str = "";
            try
            {
                //写标题
 for (int i = 0; i < dgvAgeWeekSex.ColumnCount; i++)
                {
                    if (i > 0)
                    {
                        str += "\t";
                    }
                    str += dgvAgeWeekSex.Columns[i].HeaderText;
                }
                sw.WriteLine(str);
                //写内容
 for (int j = 0; j < dgvAgeWeekSex.Rows.Count; j++)
                {
                    string tempStr = "";
                    for (int k = 0; k < dgvAgeWeekSex.Columns.Count; k++)
                    {
                        if (k > 0)
                        {
                            tempStr += "\t";
                        }
                        tempStr += dgvAgeWeekSex.Rows[j].Cells[k].Value.ToString();
                    }
                   
                    sw.WriteLine(tempStr);                    
                }
                sw.Close();
                myStream.Close();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }
            finally
            {
                sw.Close();
                myStream.Close();
            }          
      }
```
1. #region DataGridView数据显示到Excel
2. /// <summary>
3. /// 打开Excel并将DataGridView控件中数据导出到Excel
4. /// </summary>
5. /// <param name="dgv">DataGridView对象 </param>
6. /// <param name="isShowExcle">是否显示Excel界面 </param>
7. /// <remarks>
8. /// add com "Microsoft Excel 11.0 Object Library"
9. /// using Excel=Microsoft.Office.Interop.Excel;
10. /// </remarks>
11. /// <returns> </returns>
12. public bool DataGridviewShowToExcel(DataGridView dgv, bool isShowExcle)
13. {
14. if (dgv.Rows.Count == 0)
15. return false;
16. //建立Excel对象
17. Excel.Application excel = new Excel.Application();
18. excel.Application.Workbooks.Add(true);
19. excel.Visible = isShowExcle;
20. //生成字段名称
21. for (int i = 0; i < dgv.ColumnCount; i++)
22. {
23. excel.Cells[1, i + 1] = dgv.Columns[i].HeaderText;
24. }
25. //填充数据
26. for (int i = 0; i < dgv.RowCount - 1; i++)
27. {
28. for (int j = 0; j < dgv.ColumnCount; j++)
29. {
30. if (dgv[j, i].ValueType == typeof(string))
31. {
32. excel.Cells[i + 2, j + 1] = "'" + dgv[j, i].Value.ToString();
33. }
34. else
35. {
36. excel.Cells[i + 2, j + 1] = dgv[j, i].Value.ToString();
37. }
38. }
39. }
40. return true;
41. }
42. #endregion
44. #region DateGridView导出到csv格式的Excel
45. /// <summary>
46. /// 常用方法，列之间加\t，一行一行输出，此文件其实是csv文件，不过默认可以当成Excel打开。
47. /// </summary>
48. /// <remarks>
49. /// using System.IO;
50. /// </remarks>
51. /// <param name="dgv"></param>
52. private void DataGridViewToExcel(DataGridView dgv)
53. {
54. SaveFileDialog dlg = new SaveFileDialog();
55. dlg.Filter = "Execl files (*.xls)|*.xls";
56. dlg.FilterIndex = 0;
57. dlg.RestoreDirectory = true;
58. dlg.CreatePrompt = true;
59. dlg.Title = "保存为Excel文件";
61. if (dlg.ShowDialog() == DialogResult.OK)
62. {
63. Stream myStream;
64. myStream = dlg.OpenFile();
65. StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
66. string columnTitle = "";
67. try
68. {
69. //写入列标题
70. for (int i = 0; i < dgv.ColumnCount; i++)
71. {
72. if (i > 0)
73. {
74. columnTitle += "\t";
75. }
76. columnTitle += dgv.Columns[i].HeaderText;
77. }
78. sw.WriteLine(columnTitle);
80. //写入列内容
81. for (int j = 0; j < dgv.Rows.Count; j++)
82. {
83. string columnValue = "";
84. for (int k = 0; k < dgv.Columns.Count; k++)
85. {
86. if (k > 0)
87. {
88. columnValue += "\t";
89. }
90. if (dgv.Rows[j].Cells[k].Value == null)
91. columnValue += "";
92. else
93. columnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim();
94. }
95. sw.WriteLine(columnValue);
96. }
97. sw.Close();
98. myStream.Close();
99. }
100. catch (Exception e)
101. {
102. MessageBox.Show(e.ToString());
103. }
104. finally
105. {
106. sw.Close();
107. myStream.Close();
108. }
109. }
110. }
111. #endregion
113. #region DataGridView导出到Excel，有一定的判断性
114. /// <summary>
115. ///方法，导出DataGridView中的数据到Excel文件
116. /// </summary>
117. /// <remarks>
118. /// add com "Microsoft Excel 11.0 Object Library"
119. /// using Excel=Microsoft.Office.Interop.Excel;
120. /// using System.Reflection;
121. /// </remarks>
122. /// <param name= "dgv"> DataGridView </param>
123. public static void DataGridViewToExcel(DataGridView dgv)
124. {
127. #region 验证可操作性
129. //申明保存对话框
130. SaveFileDialog dlg = new SaveFileDialog();
131. //默然文件后缀
132. dlg.DefaultExt = "xls ";
133. //文件后缀列表
134. dlg.Filter = "EXCEL文件(*.XLS)|*.xls ";
135. //默然路径是系统当前路径
136. dlg.InitialDirectory = Directory.GetCurrentDirectory();
137. //打开保存对话框
138. if (dlg.ShowDialog() == DialogResult.Cancel) return;
139. //返回文件路径
140. string fileNameString = dlg.FileName;
141. //验证strFileName是否为空或值无效
142. if (fileNameString.Trim() == " ")
143. { return; }
144. //定义表格内数据的行数和列数
145. int rowscount = dgv.Rows.Count;
146. int colscount = dgv.Columns.Count;
147. //行数必须大于0
148. if (rowscount <= 0)
149. {
150. MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
151. return;
152. }
154. //列数必须大于0
155. if (colscount <= 0)
156. {
157. MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
158. return;
159. }
161. //行数不可以大于65536
162. if (rowscount > 65536)
163. {
164. MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
165. return;
166. }
168. //列数不可以大于255
169. if (colscount > 255)
170. {
171. MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
172. return;
173. }
175. //验证以fileNameString命名的文件是否存在，如果存在删除它
176. FileInfo file = new FileInfo(fileNameString);
177. if (file.Exists)
178. {
179. try
180. {
181. file.Delete();
182. }
183. catch (Exception error)
184. {
185. MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
186. return;
187. }
188. }
189. #endregion
190. Excel.Application objExcel = null;
191. Excel.Workbook objWorkbook = null;
192. Excel.Worksheet objsheet = null;
193. try
194. {
195. //申明对象
196. objExcel = new Microsoft.Office.Interop.Excel.Application();
197. objWorkbook = objExcel.Workbooks.Add(Missing.Value);
198. objsheet = (Excel.Worksheet)objWorkbook.ActiveSheet;
199. //设置EXCEL不可见
200. objExcel.Visible = false;
202. //向Excel中写入表格的表头
203. int displayColumnsCount = 1;
204. for (int i = 0; i <= dgv.ColumnCount - 1; i++)
205. {
206. if (dgv.Columns[i].Visible == true)
207. {
208. objExcel.Cells[1, displayColumnsCount] = dgv.Columns[i].HeaderText.Trim();
209. displayColumnsCount++;
210. }
211. }
212. //设置进度条
213. //tempProgressBar.Refresh();
214. //tempProgressBar.Visible = true;
215. //tempProgressBar.Minimum=1;
216. //tempProgressBar.Maximum=dgv.RowCount;
217. //tempProgressBar.Step=1;
218. //向Excel中逐行逐列写入表格中的数据
219. for (int row = 0; row <= dgv.RowCount - 1; row++)
220. {
221. //tempProgressBar.PerformStep();
223. displayColumnsCount = 1;
224. for (int col = 0; col < colscount; col++)
225. {
226. if (dgv.Columns[col].Visible == true)
227. {
228. try
229. {
230. objExcel.Cells[row + 2, displayColumnsCount] = dgv.Rows[row].Cells[col].Value.ToString().Trim();
231. displayColumnsCount++;
232. }
233. catch (Exception)
234. {
236. }
238. }
239. }
240. }
241. //隐藏进度条
242. //tempProgressBar.Visible = false;
243. //保存文件
244. objWorkbook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
245. Missing.Value, Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value,
246. Missing.Value, Missing.Value);
247. }
248. catch (Exception error)
249. {
250. MessageBox.Show(error.Message, "警告 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
251. return;
252. }
253. finally
254. {
255. //关闭Excel应用
256. if (objWorkbook != null) objWorkbook.Close(Missing.Value, Missing.Value, Missing.Value);
257. if (objExcel.Workbooks != null) objExcel.Workbooks.Close();
258. if (objExcel != null) objExcel.Quit();
260. objsheet = null;
261. objWorkbook = null;
262. objExcel = null;
263. }
264. MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
266. }
268. #endregion
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原文地址：https://www.cnblogs.com/zhcw/p/2225839.html