小编gan*_*esh的帖子

我是WPF应用程序的新手.我需要像这张图片一样自定义我的组合框.

我试过这个例子 http://www.eidias.com/Blog/2012/2/20/customizing-wpf-combo-box-style

    <Window x:Class="win.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window1"  Height="300" Width="300" Background="Red">
    <Window.Resources>
        <ControlTemplate x:Key="CustomToggleButton" TargetType="ToggleButton">
            <Grid>
                <Border Name="Border" />
                <Border Name="SmallBorder" />
                <Path Name="Arrow" />
            </Grid>
        </ControlTemplate>
        <Style TargetType="{x:Type ComboBoxItem}">
            <Setter Property="FrameworkElement.OverridesDefaultStyle" Value="True" />
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ComboBoxItem}">
                        <Border>
                            <ContentPresenter />
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style TargetType="{x:Type ComboBox}">
            <Setter Property="FrameworkElement.OverridesDefaultStyle" Value="True" />
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ComboBox">
                        <Grid>
                            <ToggleButton Template="{StaticResource CustomToggleButton}" />
                            <ContentPresenter />
                            <TextBox />
                            <Popup>
                                <Grid>
                                    <Border>
                                        <ScrollViewer>
                                            <ItemsPresenter />
                                        </ScrollViewer>
                                    </Border>
                                </Grid>
                            </Popup>
                        </Grid> …

我有一个JSON文件,其中包含如下数据:

{"posts": [ 
    { "title":"1", "url":"n1.png" }, 
    { "title":"2", "url":"n2.png" }, 
    { "title":"3", "url":"n3.png" }, 
    { "title":"4", "url":"n4.png" }, 
    { "title":"5", "url":"n5.png" }, 
    { "title":"6", "url":"n6.png" }, 
    { "title":"7", "url":"n7.png" }, 
    { "title":"8", "url":"n8.png" }, 
    { "title":"9", "url":"n9.png" }, 
    { "title":"10", "url":"n10.png" },
]}

我需要用两个文本框按范围过滤标题:从和到.

我正在开发一个从本地浏览和拍照的网络应用程序,我也希望通过相机捕获图像.我使用以下代码,我可以捕获设备相机.

<input type="file" capture="camera" accept="image/*" id="cameraInput" name="cameraInput">

现在,我想获取图像和onchangeevent,转换为base64并希望在该页面中显示.

请帮助我们!

我在Photoshop中编辑了一个图像(颜色,亮度和其他一些东西).现在我想对其他一些图像应用相同的更改.如何自动完成此过程？

我已经按照这个小提琴示例Image到Base64.当我使用直接图像路径链接时它工作正常,但是当我通过相机图像时它失败了.

   Camera.getPicture().then(function(imageURI) {
      var imageUrl = "http://upload.wikimedia.org/wikipedia/commons/4/4a/Logo_2013_Google.png";
      convertImgToDataURLviaCanvas(imageUrl, function(base64Img) {
          alert(base64Img);
      });
      var result = convertImgToDataURLviaCanvas(imageURI);
  }, function(err) {
      alert(err);
  }, {
      quality: 75,
      targetWidth: 320,
      targetHeight: 320,
      pictureSource: navigator.camera.PictureSourceType.PHOTOLIBRARY,
      destinationType: navigator.camera.DestinationType.FILE_URI,
      saveToPhotoAlbum: true
  });



function convertImgToDataURLviaCanvas(url, callback, outputFormat) {
var img = new Image();
img.crossOrigin = 'Anonymous';
img.onload = function() {
    var canvas = document.createElement('CANVAS');
    var ctx = canvas.getContext('2d');
    var dataURL;
    canvas.height = this.height;
    canvas.width = this.width;
    ctx.drawImage(this, 0, 0);
    dataURL = canvas.toDataURL(outputFormat);
    alert(dataURL + "GANESH" + outputFormat);
    callback(dataURL); …