在 WPF 中动态添加文本框 [英] Dynamically add textbox in WPF
问题描述
我正在动态创建一个文本框.我的网格中有 2 列.如果其他文本框值 =tea",我想向该行添加新文本框.我想为相应的行文本框值更改创建新文本框.我无法在此处使用 Tag 获取选定的行.因为我已经出于某种目的使用了 Tag.我对 Tag 不太了解.无论如何,如何将新文本框添加到相应行的 column1?这是我的代码..
I am creating a textbox dynamically. I have 2 columns in my grid. I want to add new textbox to the row if the other textbox value="tea". I want to create new textbox to corresponding row textbox value change. I am unable to use Tag to get selected row here. because I have already used Tag for some purpose. I don't have much idea about Tag. Anyhow, how can I add new textbox to the column1 to the corresponding row? This is my code..
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);
}
}
推荐答案
如果您只是想实现这一点,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:
If you just want to achieve this, then more elegant way will be to add the user control to your application like below:
<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>
然后在您的 btn_addnew_Click() 方法中,您只需将此用户控件添加到用户 Grid 并为其分配行和列.文本框的显示/隐藏将由用户控件本身处理.
then in your btn_addnew_Click() method, you just need to add this usercontrol to user Grid and assign row and column to it. Showing/Hiding of textbox will be taken care of by teh user control itself.
var userControl = new MyUserControl();
userControl .Margin = new Thickness(10, 10, 0, 0);
Grid.SetRow(userControl , i);
grid1.Children.Add(userControl );
或如果你想为 textbox1 设置 Grid.Row 的值,你可以直接获取它:
OR if you want to have value of Grid.Row for textbox1 you can get it directly as:
if (textbox1 != null)
{
int row = (int)textbox1.GetValue(Grid.RowProperty);
Grid.SetRow(txt2, row);
}
这篇关于在 WPF 中动态添加文本框的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!