Question

我找到了如何使用StringFormat中的XAML，但我需要以编程方式添加列，我无法找到解决方案。我使用的代码不起作用：

foreach (Fields field in fields) { DataGridTextColumn column = new DataGridTextColumn(); column.Header = field.name; column.Binding = new Binding(field.name) { Mode = BindingMode.TwoWay }; if (field.group[0] == "<numbers>" && field.group.Count == 1) column.Binding.StringFormat = "{0:d}"; dgwDataMain.Columns.Add(column); }

Answer 1

这个怎么样？

column.Binding =
    new Binding(field.name)
    {
        Mode = BindingMode.TwoWay,
        UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
    };

UpdateSourceTrigger.PropertyChanged导致在每个键入的字符上更新绑定源。因此，每次都验证输入。

TextBox.Text属性（由DataGrid单元格使用）的默认UpdateSourceTrigger值为UpdateSourceTrigger.LostFocus。

Answer 2

然后你应该使用DataTable。它的列可以是任何类型，添加新的DataGridColumn非常困难。

收集所有数据。
将正确类型的列添加到DataTable。
将所有数据添加到您的DataTable。
设置dataGrid.DataSource = DataTable;

Answer 3

你应该试试你的Xaml代码

<TextBlock>
    <Run Text="Full date/time pattern (short time): "/>
    <Run Text="{Binding DateTime, StringFormat=f, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="Full date/time pattern (long time): "/>
    <Run Text="{Binding DateTime, StringFormat=F, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="Short date/time pattern (short time): "/>
    <Run Text="{Binding DateTime, StringFormat=g, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="Short date/time pattern (long time): "/>
    <Run Text="{Binding DateTime, StringFormat=G, ElementName=userControl}"/>
</TextBlock>

或者

<TextBlock>
    <Run Text="In Currency with zero decimal point: "/>
    <Run Text="{Binding Number, StringFormat=\{0:c0\}, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="In Currency with two decimal point: "/>
    <Run Text="{Binding Number, StringFormat=\{0:c2\}, ElementName=userControl}"/>
</TextBlock>

或

<TextBlock>
    <Run Text="Normal Number: "/>
    <Run Text="{Binding Number, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="Above number with 2 decimal point: "/>
    <Run Text="{Binding Number, StringFormat=\{0:n2\}, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="Above number with 4 decimal point: "/>
    <Run Text="{Binding Number, StringFormat=\{0:n4\}, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="Above number with 10 Zero place holder: "/>
    <Run Text="{Binding Number, StringFormat=\{0:0000000000\}, ElementName=userControl}"/>
</TextBlock>

或

<TextBlock>
    <Run Text="Normal string: "/>
    <Run Text="{Binding Text, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="String with atleast 15 characters length: "/>
    <Run Text="{Binding Text, StringFormat=\{0\,15\}, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="String with atleast 25 characters length: "/>
    <Run Text="{Binding Text, StringFormat=\{0\,25\}, ElementName=userControl}"/>
</TextBlock>
<TextBlock>
    <Run Text="Text with quote: "/>
    <Run Text="{Binding Text, StringFormat='The string &quot;\{0\}&quot; inside a quot',
                              ElementName=userControl}"/>
</TextBlock>

列字符串格式

3 个答案: