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我需要在我的 WPF 应用程序中使用 datepicker 控件，但我在 Toolbox 中找不到此控件。然后我安装了 WPFToolKit 并在 xaml 文件代码中添加了命名空间，但它仍然显示以下错误：
错误 1 ​​XML 命名空间“http://schemas.microsoft.com/winfx/2006/xaml/presentation”中不存在标记“DatePicker” . 第 23 行位置 18。F:\Muhammad Anees\codereason_reports_v0.5_alpha\Samples\SimpleReport\EmployeeManager.xaml 23 18 Employee_Manager

这是我的 xaml 文件代码：

<Window x:Class="SimpleReport.EmployeeManager"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:toolkit="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit"
Title="Employee Manager - Islam Engineering Pvt Ltd." Height="513" Width="865" ResizeMode="CanMinimize">

    <TabControl Height="482" HorizontalAlignment="Left" Margin="0,-2,0,0" Name="tabControl1" VerticalAlignment="Top" Width="832">
        <TabItem Header="Add New Employee" Name="tabItem1">
            <Grid Width="806" Height="440">
                <TextBox Height="23" HorizontalAlignment="Left" Margin="177,14,0,0" Name="txtBarcode" VerticalAlignment="Top" Width="120" Background="#FFE0DECC" KeyUp="txtBarcode_KeyUp" />
                <Label Content="Employee ID:" Height="28" HorizontalAlignment="Left" Margin="19,14,0,0" Name="label1" VerticalAlignment="Top" Width="85" />
                <TextBox Height="23" HorizontalAlignment="Left" Margin="177,49,0,0" Name="emp_name" VerticalAlignment="Top" Width="254" IsEnabled="True" />
                <Label Content="Employee Name:" Height="28" Margin="19,0,676,365" Name="label2" VerticalAlignment="Bottom" />
                <Button Content="Add" Height="23" Name="addbtn" Width="75" Background="#FFD0B8B8" BorderBrush="#FFB19414" Margin="176,136,554,281" Click="addbtn_Click" />
                <Label Height="28" HorizontalAlignment="Left" Margin="177,78,0,0" Name="addmsg" VerticalAlignment="Top" Width="275" Content="Employee added Successfully!" />
            </Grid>
        </TabItem>
        <TabItem Header="Employee Attendance Report" Name="tabItem2">
            <Grid>
                <Label Content="Select Report Type:" Height="28" HorizontalAlignment="Left" Margin="24,26,0,0" Name="label7" VerticalAlignment="Top" Width="122" />
            <Button Background="#FFD0B8B8" BorderBrush="#FFB19414" Content="Generate Report" Height="23" Margin="152,157,557,270" Name="reportBtn" Click="button1_Click" />
            <RadioButton Content="Today's Report" Height="16" HorizontalAlignment="Left" Margin="152,31,0,0" Name="radioButton1" VerticalAlignment="Top" />
            <DatePicker Height="25" HorizontalAlignment="Left" Margin="42,26,0,0" Name="datePicker1" VerticalAlignment="Top" Width="115" />
            <RadioButton Content="Previous Date" Height="16" HorizontalAlignment="Left" Margin="152,62,0,0" Name="radioButton2" VerticalAlignment="Top" />
            <RadioButton Content="Within Range" Height="16" HorizontalAlignment="Left" Margin="152,95,0,0" Name="radioButton3" VerticalAlignment="Top" />
        </Grid>
        </TabItem>
        <TabItem Header="Remove Employee Record" Name="tabItem3">
            <Grid>
                <ComboBox Height="23" HorizontalAlignment="Left" Margin="181,26,0,0" Name="comboBox3" VerticalAlignment="Top" Width="120" SelectionChanged="comboBox3_SelectionChanged" SelectedIndex="0" />
                <Label Content="Select Employee ID:" Height="28" HorizontalAlignment="Left" Margin="29,26,0,0" Name="label5" VerticalAlignment="Top" Width="122" />
                <Button Background="#FFD0B8B8" BorderBrush="#FFB19414" Content="Remove" Height="23" Margin="181,80,566,347" Name="button2" Width="75" />
            </Grid>
        </TabItem>
    </TabControl>

DatePicker 控件位于上述代码中的第二个 Radiobutton 控件之后。请告诉我如何克服这个问题。谢谢

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2 回答 2

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我认为您正在使用 WPF 工具包，您需要使用工具包，因为您在 WPF 工具包程序集的开头指定了该工具包

<toolkit:DatePicker Height="25" HorizontalAlignment="Left" Margin="42,26,0,0" Name="datePicker1" VerticalAlignment="Top" Width="115" />
于 2012-04-22T15:58:39.220 回答
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如果这是来自 nuget 的 wpf 工具包，那么您将其称为：

 <toolkit:DatePicker Name="blah blah" Margin="0" ect.. > </toolkit:DatePicker>

您可能还必须尝试清理并构建解决方案，因为在使用工具包之前我实际上遇到了这个错误，但是在我重建解决方案之后它就起作用了。

于 2012-04-22T16:00:20.490 回答