如何使用DataGridView显示此数组的内容? [英] How do I show the contents of this array using DataGridView?

问题描述

我创建了一个二维的字符串数组，并将其填充.我尝试将其绑定到DataGrid控件，如下所示:

I created a 2 dimensional array of strings and populated it. I try to bind it to a DataGrid control like so:

string[][] Array = new string[100][];
dataGridView.DataSource = Array;

我没有看到数组的内容，而是看到以下各列:Length，LongLenth，Rank，SyncRoot，IsReadOnly，IsFixedSize，IsSyncrhonized.

Instead of seeing the contents of the array I see the following columns: Length, LongLenth, Rank, SyncRoot, IsReadOnly, IsFixedSize, IsSyncrhonized.

因此，它不显示我的数组的内容，而是显示数组的属性.我做错了什么?

So instead of displaying the contents of my array, it displays the properties of the array. What did I do wrong?

推荐答案

当您允许网格控件自动生成列时，它将基本上枚举该对象的属性并为每个对象创建一列.它无法知道您要将其显示为数组值的网格.

When you allow the grid control to auto-generate columns, it will basically enumerate through the properties of that object and create a column for each one. It has no way to know that you want to display this as a grid of array values.

您需要使用要绑定为列的属性在数组外创建一个新对象(例如，类的可枚举列表).一种快速的方法是使用使用LINQ查询构建的匿名类型.像这样:

You'll need to create a new object (such as an enumerable list of a class) out of the array with the properties you want to bind to as columns. A quick way to do this would be to use an anonymous type, built using a LINQ query. Something like:

string[][] Array = new string[100][];
for(int i = 0; i < 100; i++) // Set some values to test
   Array[i] = new string[2] { "Value 1", "Value 2" };

dataGridView.DataSource = (from arr in Array select new { Col1 = arr[0], Col2 = arr[1] });
Page.DataBind();

在这里，我们要遍历数组的所有100个元素.每个元素都是2个字符串的数组.我们正在从这两个字符串中创建一个匿名类型.此类型具有两个属性:Col1和Col2. Col1将设置为数组索引0，而Col2将设置为数组索引1.然后，我们将为匿名类型的枚举构建网格.看起来像这样:

Here, we're iterating through all 100 elements of the array. Each element is an array of 2 strings. We're creating an anonymous type out of those two strings. This type has two properties: Col1 and Col2. Col1 will be set to array index 0, and Col2 will be set to array index 1. Then, we're building the grid to that enumeration of anonymous types. This will look something like:

您当然可以通过将AutoGenerateColumns设置为False，并填充Columns集合来确切定义如何创建列.也可以在您的ASPX文件中声明性地完成此操作.

You can of course define exactly how columns will be created by setting AutoGenerateColumns to False, and populated the Columns collection. This can be done declaratively as well within your ASPX file.

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