DevExpress中如何實現GridControl的分頁功能

簡介:DevExpress中如何實現GridControl的分頁功能,

主要是利用DataNavigator和GridControl組合,自定義事件實現分頁功能

接下來,我們就去實現分頁功能,先看下效果圖:

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整個分頁操作,基本分三步:

一:界面層

二:代碼層

三:數據庫

四:調用

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一:界面層,如圖:

說明:放入一個GridControl控件(gridLogList)和DataNavigator控件(nvgtDataPager),給GridControl綁定好列,

設置DataNavigator控件屬性Dock=Bottom;TextLocation=Center;TextStringFormat=第 {0}頁 ,共 {1};

ShowToolTips=true;將下圖中圈中的按鈕屬性visible=False;

如圖:

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二:代碼層

1.定義變量

1. //頁行數
2. public int pagesize = 20;
3. //當前頁
4. public int pageIndex = 1;
5. //總頁數
6. public int pageCount;

2.定義方法

1. /// <summary>
2. /// 綁定分頁控件和GridControl數據
3. /// </summary>
4. /// <author>PengZhen</author>
5. /// <time>2013-11-5 14:22:22</time>
6. /// <param name="strWhere">查詢條件</param>
7. public void BindPageGridList(string strWhere)
8. {
9. SystemOperateLog objSOL = new BLL.SystemOperateLog();
11. nvgtDataPager.Buttons.CustomButtons[0].Enabled = true;
12. nvgtDataPager.Buttons.CustomButtons[1].Enabled = true;
13. nvgtDataPager.Buttons.CustomButtons[2].Enabled = true;
14. nvgtDataPager.Buttons.CustomButtons[3].Enabled = true;
15. //記錄獲取開始數
16. int startIndex = (pageIndex - 1) * pagesize + 1;
17. //結束數
18. int endIndex = pageIndex * pagesize;
20. //總行數
21. int row = objSOL.GetRecordCount(strWhere);
23. //獲取總頁數
24. if (row % pagesize > 0)
25. {
26. pageCount = row / pagesize + 1;
27. }
28. else
29. {
30. pageCount = row / pagesize;
31. }
33. if (pageIndex == 1)
34. {
35. nvgtDataPager.Buttons.CustomButtons[0].Enabled = false;
36. nvgtDataPager.Buttons.CustomButtons[1].Enabled = false; ;
37. }
39. //最後頁時獲取真實記錄數
40. if (pageCount == pageIndex)
41. {
42. endIndex = row;
43. nvgtDataPager.Buttons.CustomButtons[2].Enabled = false;
44. nvgtDataPager.Buttons.CustomButtons[3].Enabled = false;
45. }
47. //分頁獲取數據列表
48. DataTable dt = objSOL.GetListByPage(strWhere, "", startIndex, endIndex).Tables[0];
50. gridLogList.DataSource = dt;
52. nvgtDataPager.DataSource = dt;
53. nvgtDataPager.TextStringFormat = string.Format("第 {0}頁, 共 {1}頁", pageIndex, pageCount);
54. }

3.定義事件

1. /// <summary>
2. /// 按鈕點擊事件
3. /// </summary>
4. /// <author>PengZhen</author>
5. /// <time>2013-11-5 14:24:25</time>
6. /// <param name="sender"></param>
7. /// <param name="e"></param>
8. private void nvgtDataPager_ButtonClick(object sender, NavigatorButtonClickEventArgs e)
9. {
10. ShowEvent("ButtonClick", e.Button);
11. }
13. /// <summary>
14. /// 分頁事件處理
15. /// </summary>
16. /// <param name="eventString">事件名稱</param>
17. /// <param name="button">按鈕控件</param>
18. /// <author>PengZhen</author>
19. /// <time>2013-11-5 14:25:59</time>
20. void ShowEvent(string eventString, NavigatorButtonBase button)
21. {
22. //string type = button.ButtonType.ToString();
23. NavigatorCustomButton btn = (NavigatorCustomButton)button;
24. string type = btn.Tag.ToString();
25. if (type == "首頁")
26. {
27. pageIndex = 1;
28. }
30. if (type=="下一頁")
31. {
32. pageIndex++;
33. }
35. if (type=="末頁")
36. {
37. pageIndex = pageCount;
38. }
40. if (type == "上一頁")
41. {
42. pageIndex--;
43. }
45. //綁定分頁控件和GridControl數據
46. BindPageGridList(strWhere);
47. }

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三:數據庫

1. /// <summary>
2. /// 獲取記錄總數
3. /// </summary>
4. public int GetRecordCount(string strWhere)
5. {
6. StringBuilder strSql = new StringBuilder();
7. strSql.Append("select count(1) FROM TL_SYSTEM_OPERATE_LOGS ");
8. if (strWhere.Trim() != "")
9. {
10. strSql.Append(" where " + strWhere);
11. }
12. object obj = _DbHelperOra.GetSingle(strSql.ToString());
13. if (obj == null)
14. {
15. return 0;
16. }
17. else
18. {
19. return Convert.ToInt32(obj);
20. }
21. }
22. /// <summary>
23. /// 分頁獲取數據列表
24. /// </summary>
25. public DataSet GetListByPage(string strWhere, string orderby, int startIndex, int endIndex)
26. {
27. StringBuilder strSql = new StringBuilder();
28. strSql.Append("SELECT * FROM ( ");
29. strSql.Append(" SELECT ROW_NUMBER() OVER (");
30. if (!string.IsNullOrEmpty(orderby.Trim()))
31. {
32. strSql.Append("order by T." + orderby);
33. }
34. else
35. {
36. strSql.Append("order by T.ID desc");
37. }
38. strSql.Append(")AS Rowssss, T.* from TL_SYSTEM_OPERATE_LOGS T ");
39. if (!string.IsNullOrEmpty(strWhere.Trim()))
40. {
41. strSql.Append(" WHERE " + strWhere);
42. }
43. strSql.Append(" ) TT");
44. strSql.AppendFormat(" WHERE TT.Rowssss between {0} and {1}", startIndex, endIndex);
45. return _DbHelperOra.Query(strSql.ToString());
46. }

說明:數據庫的操作只作為借鑒,請根據自己的表做相應的修改

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四:調用

如文章開頭第一張效果圖所述,當我就行查詢操作時,也就是調用分頁和綁定數據,需要做的操作,如下:

1. //查詢條件
2. private static string strWhere = string.Empty;
4. /// <summary>
5. /// 查詢
6. /// </summary>
7. /// <author>PengZhen</author>
8. /// <time>2013-10-30 11:08:03</time>
9. /// <param name="sender"></param>
10. /// <param name="e"></param>
11. private void btSelect_Click(object sender, EventArgs e)
12. {
13. //獲取查詢條件
14. strWhere = GetSqlWhere();
16. BindPageGridList(strWhere);
17. }
19. /// <summary>
20. /// 獲取查詢條件
21. /// </summary>
22. /// <author>PengZhen</author>
23. /// <time>2013-11-5 15:25:00</time>
24. /// <returns>返回查詢條件</returns>
25. private string GetSqlWhere()
26. {
27. //查詢條件
28. string strReturnWhere = string.Empty;
30. //用戶編號
31. string strUserId = string.Empty;
33. if (!string.IsNullOrEmpty(UserManage.UserID))
34. {
35. strUserId = "12";// UserManage.UserID;
36. }
37. //分系統編碼
38. string strSubSystemCode = string.Empty;
40. if (cbbSubSystemCode.SelectedItem != null)
41. {
42. strSubSystemCode = (cbbSubSystemCode.SelectedItem as ComboBoxData).Value;
43. }
45. //功能模塊
46. string strFunctionModule = string.Empty;
48. if (cbbFunctionModule.SelectedItem != null)
49. {
50. strFunctionModule = (cbbFunctionModule.SelectedItem as ComboBoxData).Value;
51. }
53. //數據分類
54. string strDataType = string.Empty;
56. if (tcbDataType.SelectedNode != null)
57. {
58. strDataType = tcbDataType.SelectedNode.Name;
59. }
61. //操作類型
62. string strOperatedType = string.Empty;
64. if (cbbOperatedType.SelectedItem != null)
65. {
66. strOperatedType = (cbbOperatedType.SelectedItem as ComboBoxData).Value;
67. }
68. //開始時間
69. string strStartTime = string.Empty;
71. if (!string.IsNullOrEmpty(dateStartTime.Text))
72. {
73. strStartTime = dateStartTime.Text;
74. }
75. //結束時間
76. string strEndTime = string.Empty;
78. if (!string.IsNullOrEmpty(dateEndTime.Text))
79. {
80. strEndTime = dateEndTime.Text;
81. }
83. //用戶ID
84. if (!string.IsNullOrEmpty(strUserId))
85. {
86. strReturnWhere += "USER_ID=‘" + strUserId + "‘ and";
87. }
88. //分系統代碼
89. if (!string.IsNullOrEmpty(strSubSystemCode))
90. {
91. strReturnWhere += "SYSTEM_CODE=‘" + strSubSystemCode + "‘ and";
92. }
93. //模塊編號
94. if (!string.IsNullOrEmpty(strFunctionModule))
95. {
96. strReturnWhere += "MODULE_ID=‘" + strFunctionModule + "‘ and";
97. }
98. //數據分類代碼
99. if (!string.IsNullOrEmpty(strDataType))
100. {
101. strReturnWhere += "DATA_CATAGORY_CODE=‘" + strDataType + "‘ and";
102. }
103. //操作類型
104. if (!string.IsNullOrEmpty(strOperatedType))
105. {
106. strReturnWhere += "OPERATE_TYPE=‘" + strOperatedType + "‘ and";
107. }
108. //操作時間
109. if (!string.IsNullOrEmpty(strStartTime) && !string.IsNullOrEmpty(strEndTime))
110. {
111. strReturnWhere += "OPERATE_DATE between ‘" + strStartTime + "‘ and ‘" + strEndTime + "‘";
112. }
114. if (!string.IsNullOrEmpty(strReturnWhere))
115. {
116. strReturnWhere = strReturnWhere.Remove(strReturnWhere.LastIndexOf("and"));
117. }
119. return strReturnWhere;
120. }

說明:此處只需要指定你自定義的條件就可以了,以上代碼展示的只是文章圖一的實現

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好了,到這,我們的所有操作就完成了,來看下我們運行的分頁效果圖:

DevExpress中如何實現GridControl的分頁功能(組件)

出處： https://blog.csdn.net/pengzhen8805/article/details/14169327

DevExpress中實現GridControl的分頁功能