DevExpress中實現GridControl的分頁功能

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,咱們就去實現分頁功能,先看下效果圖:

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整個分頁操做,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;

在DataNavigator控件屬性Buttons --> CustomButtons  (集合)  在右側點擊按鈕，打開自定義按鈕對話框，以下圖：

點擊Add按鈕，添加4個自定義按鈕，分別爲每個按鈕設置：

ImageIndex屬性：設置顯示的樣式，本身根據功能設按鈕樣式

Tag屬性：用於判斷點擊的按鈕，四個按鈕分別設置：首頁：f；上一頁：p；下一頁：n；最後一頁：l

將下圖中圈中的按鈕屬性visible=False;  如圖:

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最主要的設置DataNavigator控件的ButtonClick事件，下面是我本身在項目中用到的，做爲參考，

        private void dataNavigator1_ButtonClick(object sender, DevExpress.XtraEditors.NavigatorButtonClickEventArgs e)
        {
            PageInfo pageInfo = dataNavigator1.Tag as PageInfo;
            if (pageInfo != null)
            {
                //首頁
                if ((e.Button).ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Custom && e.Button.Tag.ToString() == "f")
                {
                    pageInfo.CurrentPage = 1;
                }

                //上一頁
                if ((e.Button).ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Custom && e.Button.Tag.ToString() == "p")
                {

                    if (pageInfo.HasPrevious == true)
                        pageInfo.CurrentPage--;
                }

                //下一頁
                if ((e.Button).ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Custom && e.Button.Tag.ToString() == "n")
                {
                    if (pageInfo.HasNext == true)
                        pageInfo.CurrentPage++;

                }

                //最後一頁
                if ((e.Button).ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Custom && e.Button.Tag.ToString() == "l")
                {
                    pageInfo.CurrentPage = pageInfo.TotalPages;
                }
            }
            QueryCriteria();//按條件執行查詢
        }

 

也 能夠參考下面的代碼

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();
10.  
     
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;
19.  
     
20.  
    //總行數
21.  
    int row = objSOL.GetRecordCount(strWhere);
22.  
     
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.  
    }
32.  
     
33.  
    if (pageIndex == 1)
34.  
    {
35.  
    nvgtDataPager.Buttons.CustomButtons[ 0].Enabled = false;
36.  
    nvgtDataPager.Buttons.CustomButtons[ 1].Enabled = false; ;
37.  
    }
38.  
     
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.  
    }
46.  
     
47.  
    //分頁獲取數據列表
48.  
    DataTable dt = objSOL.GetListByPage(strWhere, "", startIndex, endIndex).Tables[ 0];
49.  
     
50.  
    gridLogList.DataSource = dt;
51.  
     
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.  
    }
12.  
     
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.  
    }
29.  
     
30.  
    if (type== "下一頁")
31.  
    {
32.  
    pageIndex++;
33.  
    }
34.  
     
35.  
    if (type== "末頁")
36.  
    {
37.  
    pageIndex = pageCount;
38.  
    }
39.  
     
40.  
    if (type == "上一頁")
41.  
    {
42.  
    pageIndex--;
43.  
    }
44.  
     
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:數據庫的操做只做爲借鑑,請根據本身的表作相應的修改

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四:調用

如文章開頭第一張效果圖所述,當我就行查詢操做時,也就是調用分頁和綁定數據,須要作的操做,以下:

1.  
   //查詢條件
2.  
   private static string strWhere = string.Empty;
3.  
    
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();
15.  
     
16.  
    BindPageGridList(strWhere);
17.  
    }
18.  
     
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;
29.  
     
30.  
    //用戶編號
31.  
    string strUserId = string.Empty;
32.  
     
33.  
    if (! string.IsNullOrEmpty(UserManage.UserID))
34.  
    {
35.  
    strUserId = "12"; // UserManage.UserID;
36.  
    }
37.  
    //分系統編碼
38.  
    string strSubSystemCode = string.Empty;
39.  
     
40.  
    if (cbbSubSystemCode.SelectedItem != null)
41.  
    {
42.  
    strSubSystemCode = (cbbSubSystemCode.SelectedItem as ComboBoxData).Value;
43.  
    }
44.  
     
45.  
    //功能模塊
46.  
    string strFunctionModule = string.Empty;
47.  
     
48.  
    if (cbbFunctionModule.SelectedItem != null)
49.  
    {
50.  
    strFunctionModule = (cbbFunctionModule.SelectedItem as ComboBoxData).Value;
51.  
    }
52.  
     
53.  
    //數據分類
54.  
    string strDataType = string.Empty;
55.  
     
56.  
    if (tcbDataType.SelectedNode != null)
57.  
    {
58.  
    strDataType = tcbDataType.SelectedNode.Name;
59.  
    }
60.  
     
61.  
    //操做類型
62.  
    string strOperatedType = string.Empty;
63.  
     
64.  
    if (cbbOperatedType.SelectedItem != null)
65.  
    {
66.  
    strOperatedType = (cbbOperatedType.SelectedItem as ComboBoxData).Value;
67.  
    }
68.  
    //開始時間
69.  
    string strStartTime = string.Empty;
70.  
     
71.  
    if (! string.IsNullOrEmpty(dateStartTime.Text))
72.  
    {
73.  
    strStartTime = dateStartTime.Text;
74.  
    }
75.  
    //結束時間
76.  
    string strEndTime = string.Empty;
77.  
     
78.  
    if (! string.IsNullOrEmpty(dateEndTime.Text))
79.  
    {
80.  
    strEndTime = dateEndTime.Text;
81.  
    }
82.  
     
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.  
     //操做類型
104.  
     if (! string.IsNullOrEmpty(strOperatedType))
105.  
     {
106.  
     strReturnWhere += "OPERATE_TYPE='" + strOperatedType + "' and";
107.  
     }
108.  
     //操做時間
109.  
     if (! string.IsNullOrEmpty(strStartTime) && ! string.IsNullOrEmpty(strEndTime))
110.  
     {
111.  
     strReturnWhere += "OPERATE_DATE between '" + strStartTime + "' and '" + strEndTime + "'";
112.  
     }
113.  
      
114.  
     if (! string.IsNullOrEmpty(strReturnWhere))
115.  
     {
116.  
     strReturnWhere = strReturnWhere.Remove(strReturnWhere.LastIndexOf( "and"));
117.  
     }
118.  
      
119.  
     return strReturnWhere;
120.  
     }

說明:此處只須要指定你自定義的條件就能夠了,以上代碼展現的只是文章圖一的實現

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好了,到這,咱們的全部操做就完成了,來看下咱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