如何使用MVVM以编程方式向wpf datagrid添加列？

本文介绍了如何使用MVVM以编程方式向wpf datagrid添加列？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想在带有MVVM应用程序的WPF中的用户界面中创建一个数据透视表。所以列数不​​是静态的。

I wanna create a pivot table in the user interface in a WPF with MVVM application. So the number of columns are not static.

我发现我可以通过编程方式从文件中的代码添加列（如下面的代码片段所示）。

I have found that I can programmatically add columns from the code behind file (as shown in below code snippets).

myDataGrid.Columns.Add(column );

但我不要想使用文件后面的代码。我想使用MVVM（从视图模型）进行此操作。任何人都可以给我一个解决方案吗？

But I don't wanna use the code behind file. I wanna do this with MVVM (from the view model). Can anyone give me a solution for this?

推荐答案

我找到了解决方案。

答案是简单。

定义一个 DataTable 在视图模型中

定义列（在我的例子中，我必须以方式定义列 c> foreach 循环）

添加行

然后绑定DataTable for ItemsSource 属性的datagrid。 （确保 AutoGeneratedColumns = True ）

Define a DataTable in the view model

Define columns (In my case I had to define columns programmatically within a foreach loop)

Add rows

Then bind the DataTable for the ItemsSource property of the datagrid. (Make sure that the AutoGeneratedColumns=True)

我的查看模型

private DataTable sizeQuantityTable; public DataTable SizeQuantityTable { get { return sizeQuantityTable; } set { sizeQuantityTable = value; NotifyPropertyChanged("SizeQuantityTable"); } }

我已经认可了在构造函数中

I have assinged dummy data in the constructor

public MainViewModel() { this.SizeQuantityTable = new DataTable(); DataColumn sizeQuantityColumn = new DataColumn(); sizeQuantityColumn.ColumnName = "Size Quantity"; this.SizeQuantityTable.Columns.Add(sizeQuantityColumn); DataColumn sColumn = new DataColumn(); sColumn.ColumnName = "S"; this.SizeQuantityTable.Columns.Add(sColumn); DataColumn mColumn = new DataColumn(); mColumn.ColumnName = "M"; this.SizeQuantityTable.Columns.Add(mColumn); DataRow row1 = this.SizeQuantityTable.NewRow(); row1[sizeQuantityColumn] = "Blue"; row1[sColumn] = "12"; row1[mColumn] = "15"; this.SizeQuantityTable.Rows.Add(row1); DataRow row2 = this.SizeQuantityTable.NewRow(); row2[sizeQuantityColumn] = "Red"; row2[sColumn] = "18"; row2[mColumn] = "21"; this.SizeQuantityTable.Rows.Add(row2); DataRow row3 = this.SizeQuantityTable.NewRow(); row3[sizeQuantityColumn] = "Green"; row3[sColumn] = "24"; row3[mColumn] = "27"; this.SizeQuantityTable.Rows.Add(row3); DataRow row4 = this.SizeQuantityTable.NewRow(); row4[sizeQuantityColumn] = "Yellow"; row4[sColumn] = "30"; row4[mColumn] = "33"; this.SizeQuantityTable.Rows.Add(row4); }

我的视图 / p>

My view

<Window x:Class="Pivot.MainWindow" xmlns="schemas.microsoft/winfx/2006/xaml/presentation" xmlns:x="schemas.microsoft/winfx/2006/xaml" xmlns:vm="clr-namespace:Pivot.ViewModels" Title="MainWindow" Height="350" Width="525"> <Grid> <Grid.DataContext> <vm:MainViewModel /> </Grid.DataContext> <DataGrid ItemsSource="{Binding SizeQuantityTable}" AutoGenerateColumns="True" /> </Grid> </Window>