一、前言
treeview这个控件对于我来说是用得比较多的，以前做的小聊天软件(好友列表)、音乐播放器(播放列表)、类库展示器(树形类结构)等都用的是treeview，普通的treeview并不能满足我们的需求。因此我们需要滴对treeview进行改造。下面的内容将介绍仿qq联系人treeview样式及treeview数据绑定方法。
二、treeview仿qq联系人列表
准确的说不是仿qq联系人列表，这个treeview样式作为组织架构来使用更好。废话不多说，先看效果：
2.1、基本思路
像这种联系人列表一般涉及到多层级数据，而且有很多数据是需要动态更新的，如果通过手动一条条增加数据反而更复杂，而且不方便。因此为了绑定数据方便我们使用分层模板hierarchicaldatatemplate。
分层模板中存在两种样式，一种是分组样式，一种是人员样式。不管是分组还是人员绑定的都是对象，这样我们在对象中添加一个属性来辨别是否为分组-isgrouping。
默认的treeview控件四周会有边距，因此需要设置下treeview的样式。另外鼠标经过和鼠标选中的背景色需要变化，因此还需要设置treeviewitem的样式。
根据思路，我们需要设置三个样式，treeview样式，treeviewitem样式，hierarchicaldatatemplate分层模板样式。另外为了自动计算下一级的边距，我们需要添加一个转换器indentconverter。还需要一个转换器需要将布尔类型的isgrouping转换为visibility，还需要一个转换器来对visibility取反。
这样三个样式，三个转换器。就可以实现我们上面的效果，另外还可以进行动态数据绑定。
2.2、样式代码
hierarchicaldatatemplate分层模板样式代码
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<hierarchicaldatatemplate x:key="itemnode" itemssource="{binding children,mode=twoway}">
<grid background="transparent">
<grid.resources>
<convert:booltovisible x:key="booltovisible"/>
<convert:visibletoreverse x:key="visibletoreverse"/>
</grid.resources>
<grid minheight="30" x:name="userinfo" background="transparent" margin="-5 0 0 0" visibility="{binding visibility,elementname=groupinginfo,converter={staticresource visibletoreverse}}">
<grid height="50" x:name="grid">
<border background="#62acf9" width="40" height="40" cornerradius="4" horizontalalignment="left" margin="0 0 0 0">
<textblock text="{binding surname}" fontsize="23" foreground="white" verticalalignment="center" horizontalalignment="center"/>
</border>
<textblock text="{binding name}" margin="50 7 0 0" fontsize="13"/>
<textblock text="{binding info}" foreground="#808080" margin="50 30 0 0"/>
<textblock text="{binding count,stringformat={}{0}人}" foreground="#808080" horizontalalignment="right" verticalalignment="center" margin="0 0 5 0"/>
</grid>
</grid>
<stackpanel minheight="25" x:name="groupinginfo" orientation="horizontal" background="transparent" horizontalalignment="left" visibility="{binding isgrouping,converter={staticresource booltovisible}}">
<textblock text="{binding displayname}" margin="3 0" verticalalignment="center" horizontalalignment="left"/>
</stackpanel>
</grid>
</hierarchicaldatatemplate>
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treeviewitem样式代码
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<style x:key="defaulttreeviewitem" targettype="{x:type treeviewitem}">
<setter property="minheight" value="25" />
<setter property="background" value="transparent" />
<setter property="snapstodevicepixels" value="true" />
<setter property="margin" value="0" />
<setter property="template">
<setter.value>
<controltemplate targettype="{x:type treeviewitem}">
<controltemplate.resources>
<convert:indentconverter x:key="indentconverter"/>
</controltemplate.resources>
<grid background="transparent">
<grid.rowdefinitions>
<rowdefinition/>
<rowdefinition/>
</grid.rowdefinitions>
<border name="itembackground" background="{templatebinding background}"
borderbrush="{templatebinding borderbrush}"
borderthickness="{templatebinding borderthickness}"
padding="{templatebinding padding}">
<grid background="transparent">
<grid x:name="itemroot" margin="{binding converter={staticresource indentconverter},relativesource={relativesource templatedparent}}" background="transparent">
<grid.columndefinitions>
<columndefinition width="16" />
<columndefinition width="*"/>
</grid.columndefinitions>
<togglebutton x:name="expander" horizontalalignment="left" clickmode="press" ischecked="{binding isexpanded, relativesource={relativesource templatedparent}}">
<togglebutton.style>
<style targettype="{x:type togglebutton}">
<setter property="focusable" value="false"/>
<setter property="width" value="16"/>
<setter property="height" value="16"/>
<setter property="template">
<setter.value>
<controltemplate targettype="{x:type togglebutton}">
<border background="transparent" height="16" padding="5" width="16">
<path x:name="expandpath" data="m0,0 l0,6 l6,0 z" fill="#66645e" stroke="#66645e">
<path.rendertransform>
<rotatetransform angle="135" centery="3" centerx="3"/>
</path.rendertransform>
</path>
</border>
<controltemplate.triggers>
<trigger property="ischecked" value="true">
<setter property="rendertransform" targetname="expandpath">
<setter.value>
<rotatetransform angle="180" centery="3" centerx="3"/>
</setter.value>
</setter>
<setter property="fill" targetname="expandpath" value="#66645e"/>
<setter property="stroke" targetname="expandpath" value="#66645e"/>
</trigger>
<trigger property="ismouseover" value="true">
<setter property="stroke" targetname="expandpath" value="#66645e"/>
<setter property="fill" targetname="expandpath" value="#66645e"/>
</trigger>
<multitrigger>
<multitrigger.conditions>
<condition property="ismouseover" value="true"/>
<condition property="ischecked" value="true"/>
</multitrigger.conditions>
<setter property="stroke" targetname="expandpath" value="#66645e"/>
<setter property="fill" targetname="expandpath" value="#66645e"/>
</multitrigger>
</controltemplate.triggers>
</controltemplate>
</setter.value>
</setter>
</style>
</togglebutton.style>
</togglebutton>
<contentpresenter grid.column="1" x:name="part_header" contentsource="header"
horizontalalignment="stretch" >
</contentpresenter>
</grid>
</grid>
</border>
<itemspresenter x:name="itemshost" grid.row="1"/>
</grid>
<controltemplate.triggers>
<datatrigger binding="{binding isgrouping}" value="false">
<setter property="visibility" targetname="expander" value="hidden"/>
</datatrigger>
<trigger property="hasitems" value="false">
<setter property="visibility" targetname="expander" value="collapsed"/>
</trigger>
<trigger property="isexpanded" value="false">
<setter property="visibility" targetname="itemshost" value="collapsed"/>
</trigger>
<trigger property="isselected" value="true">
<setter property="background" targetname="itembackground" value="#fae388"/>
</trigger>
<multitrigger>
<multitrigger.conditions>
<condition property="isfocused" value="false"/>
<condition sourcename="itembackground" property="ismouseover" value="true"/>
</multitrigger.conditions>
<setter property="background" value=" #fceeb9" targetname="itembackground"/>
</multitrigger>
<trigger property="isenabled" value="false">
<setter property="foreground" value="{dynamicresource {x:static systemcolors.graytextbrushkey}}"/>
</trigger>
</controltemplate.triggers>
</controltemplate>
</setter.value>
</setter>
</style>
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treeview样式代码
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<style x:key="defaulttreeview" targettype="{x:type treeview}">
<setter property="scrollviewer.cancontentscroll" value="true" />
<setter property="virtualizingstackpanel.isvirtualizing" value="true"></setter>
<setter property="virtualizingstackpanel.virtualizationmode" value="recycling" />
<setter property="scrollviewer.isdeferredscrollingenabled" value="false" />
<setter property="itemcontainerstyle" value="{staticresource defaulttreeviewitem}"></setter>
<setter property="padding" value="0"/>
<setter property="itemspanel">
<setter.value>
<itemspaneltemplate>
<virtualizingstackpanel isitemshost="true" margin="0"/>
</itemspaneltemplate>
</setter.value>
</setter>
</style>
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2.3、转换器代码
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public class indentconverter : ivalueconverter
{
public object convert(object value, type targettype, object parameter, cultureinfo culture)
{
double colunwidth = 10;
double left = 0.0;
uielement element = value as treeviewitem;
while (element.gettype() != typeof(treeview))
{
element = (uielement)visualtreehelper.getparent(element);
if (element.gettype() == typeof(treeviewitem))
left += colunwidth;
}
return new thickness(left, 0, 0, 0);
}
public object convertback(object value, type targettype, object parameter, cultureinfo culture)
{
throw new notimplementedexception();
}
}
public class booltovisible : ivalueconverter
{
public object convert(object value, type targettype, object parameter, cultureinfo culture)
{
if ((bool)value)
return visibility.visible;
else
return visibility.collapsed;
}
public object convertback(object value, type targettype, object parameter, cultureinfo culture)
{
throw new notimplementedexception();
}
}
public class visibletoreverse : ivalueconverter
{
public object convert(object value, type targettype, object parameter, cultureinfo culture)
{
if ((visibility)value == visibility.visible)
return visibility.collapsed;
else
return visibility.visible;
}
public object convertback(object value, type targettype, object parameter, cultureinfo culture)
{
throw new notimplementedexception();
}
}
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2.4、引用示例
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<treeview x:name="treevieworg" borderthickness="1" borderbrush="#bbb" background="transparent" width="280" height="500" margin="10" itemtemplate="{staticresource itemnode}" style="{staticresource defaulttreeview}">
</treeview>
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2.5、初始化数据源及绑定对象
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public mainwindow()
{
initializecomponent();
orglist = new observablecollection<orgmodel>()
{
new orgmodel()
{
isgrouping=true,
displayname="单位名称(3/7)",
children=new observablecollection<orgmodel>()
{
new orgmodel(){
isgrouping=true,
displayname="未分组联系人(2/4)",
children=new observablecollection<orgmodel>()
{
new orgmodel(){
isgrouping=false,
surname="刘",
name="刘棒",
info="我要走向天空！",
count=3
}
}
}
},
}
};
treevieworg.itemssource = orglist;
}
public observablecollection<orgmodel> orglist { get; set; }
public class orgmodel
{
public bool isgrouping { get; set; }
public observablecollection<orgmodel> children { get; set; }
public string displayname { get; set; }
public string surname { get; set; }
public string name { get; set; }
public string info { get; set; }
public int count { get; set; }
}
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总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对服务器之家的支持。
原文链接：http://www.cnblogs.com/xiaomingg/p/8765802.html