Практическое руководство. Управление столбцами и строками с помощью коллекций ColumnDefinitionsCollections и RowDefinitionsCollectionsHow to: Manipulate Columns and Rows by Using ColumnDefinitionsCollections and RowDefinitionsCollections

В этом примере показано, как использовать методы в ColumnDefinitionCollection и RowDefinitionCollection классы для выполнения действий, таких как добавление, удаление или подсчет строк или столбцов содержимого.This example shows how to use the methods in the ColumnDefinitionCollection and RowDefinitionCollection classes to perform actions like adding, clearing, or counting the contents of rows or columns. Например, вы можете Add, Clear, или Count элементы, которые включены в ColumnDefinition или RowDefinition.For example, you can Add, Clear, or Count the items that are included in a ColumnDefinition or RowDefinition.

ПримерExample

В следующем примере создается Grid элемент с Name из grid1.The following example creates a Grid element with a Name of grid1. Grid Содержит StackPanel , содержащий Button элементы, управляющие различными методами коллекции.The Grid contains a StackPanel that holds Button elements, each controlled by a different collection method. При нажатии кнопки Button, она активирует вызов метода в файле кода.When you click a Button, it activates a method call in the code-behind file.

<Grid DockPanel.Dock="Top" HorizontalAlignment="Left" Name="grid1" ShowGridLines="true" Width="625" Height="400" Background="#b0e0e6">
  <Grid.ColumnDefinitions>
    <ColumnDefinition/>
    <ColumnDefinition/>
    <ColumnDefinition/>
  </Grid.ColumnDefinitions>
  <Grid.RowDefinitions>
  <RowDefinition/>
    <RowDefinition/>
    <RowDefinition/>
  </Grid.RowDefinitions>
</Grid>

<StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Width="625" DockPanel.Dock="Top">
    <Button Width="125" Click="addCol">Add Column</Button>
    <Button Width="125" Click="addRow">Add Row</Button>
    <Button Width="125" Click="clearCol">Clear All Columns</Button>
    <Button Width="125" Click="clearRow">Clear All Rows</Button>
    <Button Width="125" Click="removeCol">Remove One Column</Button>
</StackPanel>
<StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Width="625" DockPanel.Dock="Top">
    <Button Width="125" Click="removeRow">Remove One Row</Button>
    <Button Width="125" Click="colCount">How Many Columns?</Button>
    <Button Width="125" Click="rowCount">How Many Rows?</Button>
    <Button Width="125" Click="rem5Col">Remove 5 Columns</Button>
    <Button Width="125" Click="rem5Row">Remove 5 Rows</Button>			
    </StackPanel>
<StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Width="625" DockPanel.Dock="Top">
    <Button Width="125" Click="containsRow">Contains Row?</Button>
    <Button Width="125" Click="containsCol">Contains Column?</Button>
    <Button Width="125" Click="insertRowAt">Insert Row</Button>
    <Button Width="125" Click="insertColAt">Insert Column</Button>
    <Button Width="125" Click="colReadOnly">IsReadOnly?</Button>
</StackPanel>    

В этом примере определяется ряд пользовательских методов, каждый соответствующий Click событие в Язык XAMLExtensible Application Markup Language (XAML) файл.This example defines a series of custom methods, each corresponding to a Click event in the Язык XAMLExtensible Application Markup Language (XAML) file. Можно изменить число столбцов и строк в Grid несколькими способами, включая добавление или удаление строк и столбцов; и подсчета общего количества строк и столбцов.You can change the number of columns and rows in the Grid in several ways, which includes adding or removing rows and columns; and counting the total number of rows and columns. Чтобы предотвратить ArgumentOutOfRangeException и ArgumentException исключения, можно использовать функцию проверки ошибок, RemoveRange предоставляет метод.To prevent ArgumentOutOfRangeException and ArgumentException exceptions, you can use the error-checking functionality that the RemoveRange method provides.

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;

namespace columndefinitions_grid
{
    public partial class Window1 : Window
    {
        RowDefinition rowDef1;
        ColumnDefinition colDef1;

        private void addCol(object sender, RoutedEventArgs e) 
        {
            colDef1 = new ColumnDefinition();
            grid1.ColumnDefinitions.Add(colDef1);
        }

        private void addRow(object sender, RoutedEventArgs e)
        {
            rowDef1 = new RowDefinition();
            grid1.RowDefinitions.Add(rowDef1);
        }

        private void clearCol(object sender, RoutedEventArgs e)
        {
            grid1.ColumnDefinitions.Clear();
        }

        private void clearRow(object sender, RoutedEventArgs e)
        {
            grid1.RowDefinitions.Clear();
        }

        private void removeCol(object sender, RoutedEventArgs e)
        {
            if (grid1.ColumnDefinitions.Count <= 0)
            {
                tp1.Text = "No More Columns to Remove!";
            }
            else
            {
                grid1.ColumnDefinitions.RemoveAt(0);
            }
        }

        private void removeRow(object sender, RoutedEventArgs e)
        {
            if (grid1.RowDefinitions.Count <= 0)
            {
                tp1.Text = "No More Rows to Remove!";
            }
            else
            {
                grid1.RowDefinitions.RemoveAt(0);
            }
        }

        private void colCount(object sender, RoutedEventArgs e)
        {
            tp2.Text = "The current number of Columns is: " + grid1.ColumnDefinitions.Count;
        }

        private void rowCount(object sender, RoutedEventArgs e)
        {
            tp2.Text = "The current number of Rows is: " + grid1.RowDefinitions.Count;
        }

        private void rem5Col(object sender, RoutedEventArgs e)
        {
            if (grid1.ColumnDefinitions.Count < 5)
            {
                tp1.Text = "There aren't five Columns to Remove!";
            }
            else
            {
                grid1.ColumnDefinitions.RemoveRange(0,5);
            }
        }

        private void rem5Row(object sender, RoutedEventArgs e)
        {
            if (grid1.RowDefinitions.Count < 5)
            {
                tp1.Text = "There aren't five Rows to Remove!";
            }
            else
            {
                grid1.RowDefinitions.RemoveRange(0, 5);
            }
        }

        private void containsRow(object sender, RoutedEventArgs e)
        {
            if (grid1.RowDefinitions.Contains(rowDef1))
            {
                tp2.Text = "Grid Contains RowDefinition rowDef1";
            }
            else
            {
                tp2.Text = "Grid Does Not Contain RowDefinition rowDef1";
            }
        }

        private void containsCol(object sender, RoutedEventArgs e)
        {
            if (grid1.ColumnDefinitions.Contains(colDef1))
            {
                tp3.Text = "Grid Contains ColumnDefinition colDef1";
            }
            else
            {
                tp3.Text = "Grid Does Not Contain ColumnDefinition colDef1";
            }
        }

        private void colReadOnly(object sender, RoutedEventArgs e)
        {
            tp4.Text = "RowDefinitionsCollection IsReadOnly?: " + grid1.RowDefinitions.IsReadOnly.ToString();
            tp5.Text = "ColumnDefinitionsCollection IsReadOnly?: " + grid1.ColumnDefinitions.IsReadOnly.ToString();
        }

        private void insertRowAt(object sender, RoutedEventArgs e)
        {
            rowDef1 = new RowDefinition();
            grid1.RowDefinitions.Insert(grid1.RowDefinitions.Count, rowDef1);
            tp1.Text = "RowDefinition added at index position " + grid1.RowDefinitions.IndexOf(rowDef1).ToString();
        }

        private void insertColAt(object sender, RoutedEventArgs e)
        {
            colDef1 = new ColumnDefinition();
            grid1.ColumnDefinitions.Insert(grid1.ColumnDefinitions.Count, colDef1);
            tp2.Text = "ColumnDefinition added at index position " + grid1.ColumnDefinitions.IndexOf(colDef1).ToString();
        }
    }
}
Imports System.Windows     
Imports System.Windows.Controls     
Imports System.Windows.Documents     

Namespace SDKSample

    '@ <summary>
    '@ Interaction logic for Window1.xaml
    '@ </summary>

    Partial Public Class Window1
        Inherits Window

        Dim rowDef1 As New RowDefinition
        Dim colDef1 As New ColumnDefinition

        Private Sub addCol(ByVal sender As Object, ByVal e As RoutedEventArgs)
            Dim colDef1 As New ColumnDefinition
            grid1.ColumnDefinitions.Add(colDef1)
        End Sub

        Private Sub addRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
            Dim rowDef1 As New RowDefinition()
            grid1.RowDefinitions.Add(rowDef1)
        End Sub

        Private Sub clearCol(ByVal sender As Object, ByVal e As RoutedEventArgs)
            grid1.ColumnDefinitions.Clear()
        End Sub

        Private Sub clearRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
            grid1.RowDefinitions.Clear()
        End Sub

        Private Sub removeCol(ByVal sender As Object, ByVal e As RoutedEventArgs)

            If (grid1.ColumnDefinitions.Count <= 0) Then
                tp1.Text = "No More Columns to Remove!"
            Else
                grid1.ColumnDefinitions.RemoveAt(0)
            End If
        End Sub

        Private Sub removeRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
            If (grid1.RowDefinitions.Count <= 0) Then
                tp1.Text = "No More Rows to Remove!"
            Else
                grid1.RowDefinitions.RemoveAt(0)
            End If
        End Sub

        Private Sub colCount(ByVal sender As Object, ByVal e As RoutedEventArgs)
            tp2.Text = "The current number of Columns is: " + grid1.ColumnDefinitions.Count.ToString()
        End Sub

        Private Sub rowCount(ByVal sender As Object, ByVal e As RoutedEventArgs)
            tp2.Text = "The current number of Rows is: " + grid1.RowDefinitions.Count.ToString()
        End Sub

        Private Sub rem5Col(ByVal sender As Object, ByVal e As RoutedEventArgs)
            If (grid1.ColumnDefinitions.Count < 5) Then
                tp1.Text = "There aren't five Columns to Remove!"
            Else
                grid1.ColumnDefinitions.RemoveRange(0, 5)
            End If
        End Sub

        Private Sub rem5Row(ByVal sender As Object, ByVal e As RoutedEventArgs)
            If (grid1.RowDefinitions.Count < 5) Then
                tp1.Text = "There aren't five Rows to Remove!"
            Else
                grid1.RowDefinitions.RemoveRange(0, 5)
            End If
        End Sub

        Private Sub containsRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
            If (grid1.RowDefinitions.Contains(rowDef1)) Then
                tp2.Text = "Grid Contains RowDefinition rowDef1"
            Else
                tp2.Text = "Grid Does Not Contain RowDefinition rowDef1"
            End If
        End Sub

        Private Sub containsCol(ByVal sender As Object, ByVal e As RoutedEventArgs)
            If (grid1.ColumnDefinitions.Contains(colDef1)) Then
                tp3.Text = "Grid Contains ColumnDefinition colDef1"
            Else
                tp3.Text = "Grid Does Not Contain ColumnDefinition colDef1"
            End If
        End Sub

        Private Sub colReadOnly(ByVal sender As Object, ByVal e As RoutedEventArgs)
            tp4.Text = "RowDefinitionsCollection IsReadOnly?: " + grid1.RowDefinitions.IsReadOnly.ToString()
            tp5.Text = "ColumnDefinitionsCollection IsReadOnly?: " + grid1.ColumnDefinitions.IsReadOnly.ToString()
        End Sub

        Private Sub insertRowAt(ByVal sender As Object, ByVal e As RoutedEventArgs)
            Dim rowDef1 As New RowDefinition
            grid1.RowDefinitions.Insert(grid1.RowDefinitions.Count, rowDef1)
            tp1.Text = "RowDefinition added at index position " + grid1.RowDefinitions.IndexOf(rowDef1).ToString()
        End Sub

        Private Sub insertColAt(ByVal sender As Object, ByVal e As RoutedEventArgs)
            Dim colDef1 As New ColumnDefinition()
            grid1.ColumnDefinitions.Insert(grid1.ColumnDefinitions.Count, colDef1)
            tp2.Text = "ColumnDefinition added at index position " + grid1.ColumnDefinitions.IndexOf(colDef1).ToString()
        End Sub


    End Class
End Namespace

См. такжеSee also