如何使C＃代码扩展DataGrid列？ [英] How to make DataGrid column stretch from C# code?

问题描述

我正在用C＃代码创建WPF DataGrid 的列。我希望其中一列自动扩展到 DataGrid 的宽度。在XAML中，我将设置 Width = * 。我该如何在代码中做到这一点？

I'm creating the columns of a WPF DataGrid in my C# code. I want one of the columns to stretch to the width of the DataGrid automatically. In XAML, I'd set Width="*". How do I do it in code?

编辑

有些答案似乎使我找到了正确的解决方案，但我觉得我需要详细说明一下：

EDIT
Some of the answers seem to lead me to the right solution, but I feel I need to elaborate a bit more what I'm trying to do:

我实际上是从 DataGrid派生一个新类的。在其构造函数中，我添加了四列，例如：

I'm actually deriving a new class from DataGrid. In its constructor, I add four columns like that:

this.IsReadOnly = true;
this.AutoGenerateColumns = false;
this.ItemsSource = m_dataSource;

DataGridTextColumn anColumn = new DataGridTextColumn() { Header = "Col1", Binding = new Binding("B1") };
DataGridTextColumn tpColumn = new DataGridTextColumn() { Header = "Col2", Binding = new Binding("B2") };
DataGridTextColumn txColumn = new DataGridTextColumn() { Header = "Col3", Binding = new Binding("B3") };
DataGridTextColumn mdColumn = new DataGridTextColumn() { Header = "Col4", Binding = new Binding("B4") };

this.Columns.Add(anColumn);
this.Columns.Add(tpColumn);
this.Columns.Add(txColumn);
this.Columns.Add(mdColumn);

我尝试设置最后一列的宽度，如 user24601 建议：

I tried setting the last column's width like user24601 suggested:

mdColumn.Width = new DataGridLength(0.5, DataGridLengthUnitType.Star);

但这会创建一个如此宽的列，我可以滚动并滚动 very 很长时间...当我使用 0.1 或更小的值时，同样的问题。

But this creates a column that is so wide I can scroll and scroll for a very long time... Same problem when I use 0.1 or even smaller values.

我似乎我是在错误的地方做的吗？

I seems to me I'm doing it in the wrong place somehow?

编辑2

好​​吧，我可能有问题因为我实际上是将它添加到 ScrollViewer 中。我将首先运行一些进一步的测试...

EDIT 2
OK, I may have the problem because I'm actually adding this to a ScrollViewer. I'll run some further tests first...

编辑3

在 ScrollViewer 中包含 DataGrid ...当我删除 ScrollViewer ，事情就像 user24601 所说的那样工作。

EDIT 3
Well, things don't work when having the DataGrid within a ScrollViewer... When I remove the ScrollViewer, things work like user24601 said.

推荐答案

您实际上正在使用一种称为在那里 DataGridLength 。

You're actually using something called a DataGridLength there.

尝试类似这样的事情：

Grid.ColumnDefinitions[0].Width = new DataGridLength(0.2, DataGridLengthUnitType.Star);
Grid.ColumnDefinitions[1].Width = new DataGridLength(0.8, DataGridLengthUnitType.Star);

这将在这两列之间分配80％/ 20％的剩余空间。

That will split the remaining space 80% / 20% between these two columns.

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