我正在动态创建一个文本框。我的网格中有2列。如果另一个文本框值=" tea",我想在行中添加新的文本框。我想创建新的文本框到相应的行文本框值更改。我无法使用Tag在此处获取所选行。因为我已经出于某种目的使用了Tag。我不太了解Tag。无论如何,如何将新文本框添加到column1到相应的行? 这是我的代码..
public int count = 1;
public TextBox txt1;
private void btn_addnew_Click(object sender, RoutedEventArgs e)
{
//Creating Rows..
RowDefinition row0 = new RowDefinition();
row0.Height = new GridLength(40);
grid1.RowDefinitions.Add(row0);
//Creating columns..
ColumnDefinition col0 = new ColumnDefinition();
ColumnDefinition col1 = new ColumnDefinition();
col0.Width = new GridLength(150);
col1.Width = new GridLength(250);
grid1.ColumnDefinitions.Add(col0);
grid1.ColumnDefinitions.Add(col1);
int i = count;
//1st Column TextBox
txt1 = new TextBox();
txt1.Margin = new Thickness(10, 10, 0, 0);
Grid.SetRow(txt1, i);
Grid.SetColumn(txt1, 0);
txt1.Tag = txt1;
txt1.MouseEnter+=txt1_MouseEnter;
txt1.TextChanged += txt1_TextChanged;
grid1.Children.Add(txt1);
count++;
}
private void txt1_MouseEnter(object sender, MouseEventArgs e)
{
txt1 = ((TextBox)sender).Tag as TextBox;
popup.IsOpen = true;
}
public TextBox txt2;
private void txt1_TextChanged(object sender, TextChangedEventArgs e)
{
if (txt1.Text.ToString() == "Tea")
{
txt2 = new TextBox();
//How to set row here?
Grid.SetRow(txt2, ??);
Grid.SetColumn(txt2, 1);
txt2.Margin = new Thickness(10, 10, 0, 0);
grid1.Children.Add(txt2);
}
else
{
grid1.Children.Remove(txt2);
}
}
答案 0 :(得分:1)
如果您只想实现这一目标,那么更优雅的方法是将用户控件添加到您的应用程序中,如下所示:
<UserControl x:Class="WpfApplication4.TestUserControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBox Name="TextBox1"/>
<TextBox Grid.Column="1">
<TextBox.Style>
<Style TargetType="TextBox">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Text, ElementName=TextBox1, UpdateSourceTrigger=PropertyChanged}" Value="tea">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
</Grid>
</UserControl>
然后在你的btn_addnew_Click()方法中,你只需要将这个usercontrol添加到用户Grid并为其分配行和列。显示/隐藏文本框将由用户控件本身处理。
var userControl = new MyUserControl();
userControl .Margin = new Thickness(10, 10, 0, 0);
Grid.SetRow(userControl , i);
grid1.Children.Add(userControl );
或强> 如果你想拥有text.1的Grid.Row值,你可以直接得到它:
if (textbox1 != null)
{
int row = (int)textbox1.GetValue(Grid.RowProperty);
Grid.SetRow(txt2, row);
}
答案 1 :(得分:0)
附加属性可用于存储此类信息,因此在类
中定义附加属性 public static int GetGridRow(DependencyObject obj)
{
return (int)obj.GetValue(GridRowProperty);
}
public static void SetGridRow(DependencyObject obj, int value)
{
obj.SetValue(GridRowProperty, value);
}
// Using a DependencyProperty as the backing store for GridRow. This enables animation, styling, binding, etc...
public static readonly DependencyProperty GridRowProperty =
DependencyProperty.RegisterAttached("GridRow", typeof(int), typeof(ViewModel), new PropertyMetadata(0));
然后用它来存储行的值
private void btn_addnew_Click(object sender, RoutedEventArgs e)
{
//1st Column TextBox
txt1 = new TextBox();
Grid.SetRow(txt1, i);
SetGridRow(text1, i);
...
grid1.Children.Add(txt1);
count++;
}
然后在需要时使用它
//How to set row here?
Grid.SetRow(txt2, GetGridRow(txt1));
Grid.SetColumn(txt2, 1);