WPF自动隐藏的消息框的实例代码

(鼠标放上去将一直显示，移开动画继续)，提供normal和error两种边框。

介绍：传统的确定，取消,ok,cancal之类的对话框太繁琐了，由于项目需要而诞生的仿手机式提示对话框。当然传统的对话框项目中也有，这里就不做介绍了。

出场和退场动画做得很简单，就用blend随便鼓捣了一番，将就用吧。

预览效果如下：

思路其实很简单：将窗体透明化->布局和样式设计->后台传值调用。

准备工作：microsoft.expression.interactions.dll和system.windows.interactivity.dll的引用。blend中大多数行为需要需要这2个dll，必备啊！

1，将窗体透明化，无边框化：（在.net 4.5中 拖动和缩放窗体再也不用自己写代码了，集成的 <windowchrome/>就可以实现拖动缩放窗体等诸多功能。）

关键设置如下：

allowstransparency="true" horizontalalignment="center" background="transparent" xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions" windowstyle="none"

2，布局，主要包括初始布局和动画过渡2个方面：

静态界面布局：

<grid  horizontalalignment="center" verticalalignment="top" x:name="back">
    <border padding="38 0" x:name="br" horizontalalignment="center" verticalalignment="center">
      <i:interaction.triggers>
        <i:eventtrigger eventname="mouseenter">
          <ei:controlstoryboardaction storyboard="{staticresource showsb}" controlstoryboardoption="stop"/>
        </i:eventtrigger>
        <i:eventtrigger eventname="mouseleave">
          <ei:controlstoryboardaction storyboard="{staticresource mouseleave}"/>
        </i:eventtrigger>
      </i:interaction.triggers>
      <grid horizontalalignment="center" verticalalignment="center">
        <grid horizontalalignment="center" verticalalignment="center">
          <grid.rowdefinitions>
            <rowdefinition height="12"></rowdefinition>
            <rowdefinition height="auto"></rowdefinition>
            <rowdefinition height="12"></rowdefinition>
          </grid.rowdefinitions>
          <border visibility="visible" x:name="grid1" grid.rowspan="3" rendertransformorigin="0.5,0.5" borderbrush="#00a0e9" borderthickness="1" cornerradius="8">
            <border.rendertransform>
              <transformgroup>
                <scaletransform/>
                <skewtransform/>
                <rotatetransform/>
                <translatetransform/>
              </transformgroup>
            </border.rendertransform>
            <border.background>
              <lineargradientbrush endpoint="1,1" mappingmode="relativetoboundingbox" startpoint="0,0">
                <gradientstop color="#eff0f2" offset="0.75"/>
                <gradientstop color="#eff0f2" offset="0.25"/>
                <gradientstop color="#eff0f2" offset="1"/>
                <gradientstop color="#eff0f2"/>
              </lineargradientbrush>
            </border.background>
          </border>
          <border x:name="grid2" visibility="visible" opacity="1" grid.rowspan="3" rendertransformorigin="0.5,0.5" borderbrush="#f35150" borderthickness="1" cornerradius="8">
            <border.rendertransform>
              <transformgroup>
                <scaletransform/>
                <skewtransform/>
                <rotatetransform/>
                <translatetransform/>
              </transformgroup>
            </border.rendertransform>
            <border.background>
              <lineargradientbrush endpoint="1,1" mappingmode="relativetoboundingbox" startpoint="0,0">
                <gradientstop color="#eff0f2" offset="0.75"/>
                <gradientstop color="#eff0f2" offset="0.25"/>
                <gradientstop color="#eff0f2" offset="1"/>
                <gradientstop color="#eff0f2"/>
              </lineargradientbrush>
            </border.background>
          </border>
          <textblock  margin="38 0 38 0" grid.row="1" fontsize="16" foreground="#64676d" x:name="tb" text="{binding message,relativesource={relativesource ancestortype=window},fallbackvalue=失败信息}" textwrapping="wrap" minwidth="200" verticalalignment="center" horizontalalignment="center" rendertransformorigin="0.5,0.5" maxwidth="600" textalignment="center" fontfamily="microsoft yahei">
            <textblock.rendertransform>
              <transformgroup>
                <scaletransform/>
                <skewtransform/>
                <rotatetransform/>
                <translatetransform/>
              </transformgroup>
            </textblock.rendertransform></textblock>
        </grid>
      </grid>
    </border>
  </grid>

进入和退出的动画控制：

<storyboard x:key="showsb" completed="storyboard_completed">
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.rendertransform).(transformgroup.children)[3].(translatetransform.y)" storyboard.targetname="grid1">
        <easingdoublekeyframe keytime="0" value="{binding yoffset}"/>
        <easingdoublekeyframe keytime="0:0:0.5" value="0"/>
        <easingdoublekeyframe keytime="0:0:3" value="0"/>
        <easingdoublekeyframe keytime="0:0:3.5" value="{binding yoffset}"/>
      </doubleanimationusingkeyframes>
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.rendertransform).(transformgroup.children)[3].(translatetransform.y)" storyboard.targetname="grid2">
        <easingdoublekeyframe keytime="0" value="{binding yoffset}"/>
        <easingdoublekeyframe keytime="0:0:0.5" value="0"/>
        <easingdoublekeyframe keytime="0:0:3" value="0"/>
        <easingdoublekeyframe keytime="0:0:3.5" value="{binding yoffset}"/>
      </doubleanimationusingkeyframes>
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.rendertransform).(transformgroup.children)[3].(translatetransform.y)" storyboard.targetname="tb">
        <easingdoublekeyframe keytime="0" value="{binding yoffset}"/>
        <easingdoublekeyframe keytime="0:0:0.5" value="0"/>
        <easingdoublekeyframe keytime="0:0:3" value="0"/>
        <easingdoublekeyframe keytime="0:0:3.5" value="{binding yoffset}"/>
      </doubleanimationusingkeyframes>
    </storyboard>
    <storyboard x:key="mouseleave" completed="storyboard_completed">
      <doubleanimationusingkeyframes  storyboard.targetproperty="(uielement.opacity)" storyboard.targetname="grid1">
        <easingdoublekeyframe keytime="0:0:0.5" value="0"/>
      </doubleanimationusingkeyframes>
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.opacity)" storyboard.targetname="grid2">
        <easingdoublekeyframe keytime="0:0:0.5" value="0"/>
      </doubleanimationusingkeyframes>
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.opacity)" storyboard.targetname="tb">
        <easingdoublekeyframe keytime="0:0:0.5" value="0"/>
      </doubleanimationusingkeyframes>
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.rendertransform).(transformgroup.children)[3].(translatetransform.y)" storyboard.targetname="grid1">
        <easingdoublekeyframe keytime="0:0:0.5" value="{binding yoffset}"/>
      </doubleanimationusingkeyframes>
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.rendertransform).(transformgroup.children)[3].(translatetransform.y)" storyboard.targetname="grid2">
        <easingdoublekeyframe keytime="0:0:0.5" value="{binding yoffset}"/>
      </doubleanimationusingkeyframes>
      <doubleanimationusingkeyframes storyboard.targetproperty="(uielement.rendertransform).(transformgroup.children)[3].(translatetransform.y)" storyboard.targetname="tb">
        <easingdoublekeyframe keytime="0:0:0.5" value="{binding yoffset}"/>
      </doubleanimationusingkeyframes>
    </storyboard>

注意：鼠标移动上去停止动画和移出后快速消失的代码为：

<i:interaction.triggers>
<i:eventtrigger eventname="mouseenter">
<ei:controlstoryboardaction storyboard="{staticresource showsb}" controlstoryboardoption="stop"/>
</i:eventtrigger>
<i:eventtrigger eventname="mouseleave">
<ei:controlstoryboardaction storyboard="{staticresource mouseleave}"/>
</i:eventtrigger>
</i:interaction.triggers> 

后台代码逻辑：

private bool iserror = false;
public void show(string messageboxtext, bool iserror = false)
{
this.iserror = iserror;
this.message = messageboxtext;
this.show();
}
public onlyshowmessagebox()
{
initializecomponent();
this.datacontext = new model() { yoffset = -300d };
this.loaded += (y, k) =>
{
this.top = 41;
this.left = (systemparameters.workarea.width) / 2 - this.actualwidth / 2;
if (iserror)
{
this.grid.visibility = visibility.collapsed;
}
else { this.grid.visibility = visibility.collapsed; }
(this.resources["showsb"] as storyboard).begin();
};
}
private void storyboard_completed(object sender, eventargs e)
{
this.close();
} 

其中 ：

public class model : modelbase
{
private double yoffset;
public double yoffset
{
get { return yoffset; }
set
{
yoffset = value;
raisepropertychangedevent("yoffset");
}
}
} 

其中modelbase在 可分组的选择框控件(mvvm下)(toggle样式 仿造单选框radiobutton，复选框checkbox功能) 中有介绍。

最后，调用方法：

new onlyshowmessagebox().show("请注意：前方高能，禁止入内！", false);

或者

new onlyshowmessagebox().show("不存在此对象！", true);

以上所述是小编给大家介绍的wpf自动隐藏的消息框的全部叙述，希望对大家有所帮助，如果大家想了解更多内容敬请关注！