未整理笔记

ASPxGridView

1.//ASPxGridView前台获取行号

<ClientSideEvents RowClick="function(s, e) {

s.GetRowKey(e.visibleIndex);

2.在后台动绑定gridview的列

绑定列不能直接对象调用修改内部属性（原理：定义的所有列都是父类gridviewdatacolumn类，并不是直接定义子类）。

比如列为<gridviewdataComboBoxcolumn>，需要后台先定义一个

gridviewdataComboBoxcolumn column1=gridview.Columns["修改的列"] as gridviewdataComboBoxcolumn;

之后用column1来定义：column1.PropertiesComboBox.DataSource=datasource1；（自己定义数据源）

其他的列类型写法一样

绑定列要写在绑定gridview之前

3.ASPxGridView进入选中行后台事件必须设置<SettingsBehavior ProcessSelectionChangedOnServer="true" /> 想要刷新页面，设置EnableCallBacks="false"

<SettingsBehavior AllowFocusedRow="true" 选中行 EnableRowHotTrack="true" 跟随鼠标移动

4.Gridview中行字符多显示省略号

5.列的宽度的拖动

SettingsResizing-ColumnResizeMode="NextColumn"

下拉框选中后允许为空

var rowindex= grid.GetFocusedRowIndex();//获取选中行行号

var rowid= grid.GetRowKey(rowindex);//根据行号获取rowid

设置修改行中一列的值 gridApp.SetEditValue(9, names);

ShowStatusBar="Hidden" 不显示自带的保存取消按钮

Settings-GridLines="None" 显示行的边框和列的边框

7.当使用皮肤Office365时行的横向边框不会显示，在Page_Load中加入以下代码可以显示边框

grdPeriod.Settings.GridLines = (GridLines)Enum.Parse(typeof(GridLines), "Both", true);

ASPxComboBox

1.控件前台属性AutoPostBack="true"才能触发后台事件

2.ASPxComboBox前台指定数据后台可以进事件，必须后台页面加载时给一个数据库的值

<dx:ASPxComboBox ID="ComboBoxDatetype" runat="server" OnSelectedIndexChanged="ComboBoxDatetype_SelectedIndexChanged" AutoPostBack="true">

<Items>

<dx:ListEditItem Text="表" Value="1" />

<dx:ListEditItem Text="字典" Value="0" />

</Items>

</dx:ASPxComboBox>

protected void Bind()

{

string sql = @"select exCtrl from Base_TblField GROUP BY exCtrl";

DataTable dt_ctrl = APIcall.GetDataTableBysql(sql);

this.ComboBoxDatetype.Text = dt.Rows[0]["exUptCtrlType"].ToString() == "1" ? "表" : "字典";

}

protected void ComboBoxDatetype_SelectedIndexChanged(object sender, EventArgs e)

{

//可以进，也可以刷新

}

Carsview

中卡片的高度设置

Styles-Card-Height="100"

20.找控件之中的控件

ASPxListBox listbox = ASPxDropDownEdit1.FindControl("listBox") as ASPxListBox;

21.Json序列化和反序列化

引用Newtonsoft.Json DLL

添加using Newtonsoft.Json;命名空间

JsonConvert.SerializeObject(dt) //DataTable序列化为json

//反序列化 str1为Json字符串

DataTable dt = Newtonsoft.Json.JsonConvert.DeserializeObject(str1, typeof(DataTable)) as DataTable;

22.读取网页(HTTP/HTTPS)内容

引用System.Net.Http DLL

添加using System.Net.Http;命名空间

HttpClient client = new HttpClient();

var task = client.GetAsync(url)

23.sql语句查询实体字段的属性说明（描述）等

SELECT obj.name AS 表名,

col.colorder AS 序号 ,

col.name AS 列名 ,

ISNULL(ep.[value], '') AS 列说明 ,

t.name AS 数据类型 ,

col.length AS 长度 ,

ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小数位数 ,

CASE WHEN COLUMNPROPERTY(col.id, col.name, 'IsIdentity') = 1 THEN '√'

ELSE ''

END AS 标识 ,

CASE WHEN EXISTS ( SELECT 1

FROM dbo.sysindexes si

INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id

AND si.indid = sik.indid

INNER JOIN dbo.syscolumns sc ON sc.id = sik.id

AND sc.colid = sik.colid

INNER JOIN dbo.sysobjects so ON so.name = si.name

AND so.xtype = 'PK'

WHERE sc.id = col.id

AND sc.colid = col.colid ) THEN '√'

ELSE '0'

END AS 主键 ,

CASE WHEN col.isnullable = 1 THEN '1'

ELSE '0'

END AS 允许空 ,

ISNULL(comm.text, '') AS 默认值

FROM dbo.syscolumns col

LEFT JOIN dbo.systypes t ON col.xtype = t.xusertype

inner JOIN dbo.sysobjects obj ON col.id = obj.id

AND obj.xtype = 'U'

AND obj.status >= 0

LEFT JOIN dbo.syscomments comm ON col.cdefault = comm.id

LEFT JOIN sys.extended_properties ep ON col.id = ep.major_id

AND col.colid = ep.minor_id

AND ep.name = 'MS_Description'

LEFT JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id

AND epTwo.minor_id = 0

AND epTwo.name = 'MS_Description'

WHERE obj.name LIKE

'cishis%'--表名

ORDER BY obj.name

24.gridview列拖动，自带确认取消编辑按钮等属性

<SettingsResizing ColumnResizeMode="NextColumn" /> 列拖动

<Settings ShowStatusBar="Hidden" /> 自带编辑确认按钮

</SettingsEditing> 编辑形式，双击进入编辑

25.c#隐藏按钮文本框时不能使用Enabled这种后台属性，要使用ClientEnabled这种前台属性，不然在前台会获取不到这个控件

26.DX控件前台获文本框的值和前台设置label的值

var sss = Text_Name.GetText(); //获取

var c = ASPxClientLabel.Cast(ASPxLabel12);//设置

c.SetText("年项目进度对比图");

27.Sql查询两个字段合并组合成一个字段

SELECT tblname , tbldesc ,('['+tbldesc+']'+ tblname) AS name FROM _Base_TblList

28.Sql查询节点下面所有的子节点

WITH f AS(SELECT * FROM BASE_AppModleList WHERE rowid='D6EB537E81CC4176AC2AA66C010A2C94'

UNION ALL SELECT a.* FROM BASE_AppModleList AS a JOIN f AS b ON a.prowid=b.rowid)

SELECT * FROM f

29.Dx控件To work properly, DevExpress components require ASPxHttpHandlerModule registered in the web.config file. For details, see: http://documentation.devexpress.com/#AspNet/CustomDocument7540 问题

iis低版本webconfig中加入

</httpModules>

</httpHandlers>

Iis7版本webconfig中加入

<system.web>

</httpModules>

</httpHandlers>

</system.web>

<system.webServer>

</handlers>

</modules>

</system.webServer>

新的实验结果：

</httpModules>

<system.webServer>

</modules>

</handlers>

</system.webServer>

Webconfig中加入以下语句，页面中就不用引用dev了

</controls>

</pages>

30.Sql查询节点下面所有的子节点并且组成标题（1 1.1 1.2.1 ）

WITH f AS(SELECT * FROM BASE_AppModleList WHERE rowid='D6EB537E81CC4176AC2AA66C010A2C94'

UNION ALL SELECT a.* FROM BASE_AppModleList AS a JOIN f AS b ON a.prowid=b.rowid)

SELECT * FROM f

with t1 as (

SELECT [rowid],[prowid],[ModName], substring(Cast((10000+DENSE_RANK() OVER (ORDER BY rowid)) as varchar(max)) ,2,4)AS INDEs ,Cast((DENSE_RANK() OVER (ORDER BY rowid)) as varchar(max)) AS INDE FROM [BASE_AppModleList] Where prowid='000000' AND [state]='0'

union all

SELECT t2.[rowid],T2.[prowid],T2.[ModName],(T1.INDEs +'.'+SUBSTRING( Cast((10000+DENSE_RANK() OVER (ORDER BY t2.rowid)) as varchar(max)),2,4) ) as INDEs ,(T1.INDE +'.'+ Cast((DENSE_RANK() OVER (ORDER BY t2.rowid)) as varchar(max))) as INDE

from [BASE_AppModleList] t2

inner Join t1 on t2.[prowid]=t1.[rowid])

select * from t1 ORDER BY INDEs

31.文本框不能为空约束

<dx:ASPxSpinEdit ID="ASPxSpinEdit1" Enabled="false" runat="server" Number="0">

</ErrorImage>

</ValidationSettings>

</dx:ASPxSpinEdit>

获取字符串中字符的位置（不区分大小写）

var ii = sql.IndexOf("view", StringComparison.CurrentCultureIgnoreCase);

33.获取数据库中字段的一些属性、中文名、默认值等

select c.name as ColumnName , t.name as DataType, c.object_id,c.max_length , c.is_nullable , d.definition,ISNULL(ep.[value], '') AS 列说明, CASE WHEN EXISTS(SELECT 1 FROM

dbo.sysindexes si INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id AND si.indid = sik.indid

INNER JOIN dbo.syscolumns sc ON sc.id = sik.id AND sc.colid = sik.colid

INNER JOIN dbo.sysobjects so ON so.name = si.name AND so.xtype = 'PK'

WHERE sc.id = c.[object_id] AND sc.colid = c.column_id) THEN '1' ELSE '0' END AS 主键

from sys.COLUMNS c join sys.types t on c.system_type_id = t.user_type_id

LEFT JOIN sys.default_constraints d ON c.default_object_id = d.object_id

LEFT JOIN sys.extended_properties ep ON c.[object_id] = ep.major_id AND c.column_id= ep.minor_id AND ep.name = 'MS_Description' WHERE c.object_id='222623836'

34.获取Gridview行的行号根据主键

grdList.FindVisibleIndexByKeyValue

35.显示treeview节点选中状态

AllowSelectNode="true"

36.Treeviewlist的属性及方法

navtree.ExpandToLevel(2);//树展开到第几级后台设置属性

37.找出一个数组在另一个数组没有的元素

string[] p = new[] { "a","b"}

string[] c = new[] { "a","b","c"}

string list_deve = string.Empty;

foreach (string item in c)

{

if (Array.IndexOf(p, item) < 0)

{

list_deve += "，" + item;

}

38.查表中tblname字段数据含有’testTable1’或’testTable2’的记录（用逗号分隔更准确）

SELECT * FROM dbo.Base_TblField WHERE CHARINDEX(','+tblname+',' , ',testTable1,testTable2,')>0

39.ASPxPopupControl中的属性

Maximized 窗口最大化（设置为true时窗口直接变成最大）

PopupHorizontalAlign 水平的居中显示

PopupVerticalAlign 垂直的居中显示

CloseAction="CloseButton" 弹框之后不能点击其他地方

AllowDragging 能否拖动

ShowMaximizeButton 显示最大化按钮

PopupAnimationType 弹框方式

40.ASPxPopupControl的弹框在

ASPxGridView的列中没有GridViewDataComboBoxColumn

点击事件是GridViewCommandColumn中按钮触发，

本页面没有ASPxPopupControl控件时不能获取到ASPxClientPopupControl.Cast(window.top.ASPxPopupControl1)用window.parent获取也不行

41.前台定义一个数组

var mycars = new Array();

mycars[0] = "Saab";

mycars[1] = "Volvo";

mycars[2] = "BMW";

42.文本框不能为空属性 Display="Dynamic"提示文字开始不占位置为Static则占位置

IsRequired="true" 启用验证为false不启用

<dx:ASPxTextBox ID="txtName" runat="server" Width="300px">

</ValidationSettings>

</dx:ASPxTextBox>

29.Dx控件To work properly, DevExpress components require ASPxHttpHandlerModule registered in the web.config file. For details, see: http://documentation.devexpress.com/#AspNet/CustomDocument7540 问题

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