可以在datagridview中切换行和列吗？ [英] Is it possible to switch rows and columns in a datagridview?

问题描述

我在DataTable中有10个数据记录，其中有3个字段Foo，Bar和Baz。

如果我将一个DataGridView我看到10行和3列，列标题显示字段的名称。

我想知道如何容易地颠倒行和列所以使用相同的数据，我最终会有3行和10列，字段名称显示在行标题中。

---

我可以手动执行某些操作，例如覆盖OnPaint方法并将字段名称直接绘制到行标题单元格中，但我正在寻找更自动化的东西。

再次，有一个建议交换值手动，但除非我做所有的值字符串，这是不会工作。数据表中的3列 - 类型为int，float和string的Foo，Bar和Baz不会转置。

即使我管理了所有这些手动更改，我的数据网格有CheckBox列，ComboBox列 - 没有这样的行对应存在 - 没有CheckBox行或ComboBox行。我现在只需要告诉编译器添加一个ComboBoxColumn，我必须重写，以便每个单元都是单独生成的。

理想情况下像一个TransposableDataGridView，它暴露了DataGridView的所有功能，另外还有一个bool属性Transposed。这样我可以把所有的代码完全保留下来 - 除了网格的类型之外，我不需要改变任何东西。

如果没有这样的存在我可能只需要去写它。 （应该只需要一年左右！）：

解决方案

您可以创建新的DataTable，添加适当数量的collumns将值从一个表复制到另一个表，只是交换行和列。

我不认为可以设置行标题的方式与列标题相同或至少我不知道如何），所以你可以将字段名称放在单独的列。

  DataTable oldTable = new DataTable（）; 
 
 ... 
 
 DataTable newTable = new DataTable（）; 
 
 newTable.Columns.Add（Field Name）; （int i = 0; i< oldTable.Rows.Count; i ++）
 newTable.Columns.Add（）; 
对于（int i = 0; i 
 
 
 {
 DataRow newRow = newTable.NewRow（）; 
 
 newRow [0] = oldTable.Columns [i] .Caption; 
 for（int j = 0; j< oldTable.Rows.Count; j ++）
 newRow [j + 1] = oldTable.Rows [j] [i]; 
 newTable.Rows.Add（newRow）; 
} 
 
 dataGridView.DataSource = newTable; 
  

I have 10 records of data in a DataTable which has 3 fields "Foo", "Bar", and "Baz".

If I connect wire this into a DataGridView I see 10 rows and 3 columns, and the column headers display the names of the fields.

I'm wondering how easy it is to reverse the rows and columns so that with the same data I end up with 3 rows and 10 columns, with field names being displayed in the row headers.

---

I can do some things manualy, like overriding an OnPaint method and drawing the field names directly into the row header cells, but I'm looking for something more automated.

Again, there's a suggestion of swapping values manualy, but unless I make all values Strings, this isn't going to work. 3 columns in a data table - Foo, Bar, and Baz of types int, float and string just won't transpose.

Even if I managed all of these manual changes, my data grids have CheckBox columns, ComboBox columns - no such row counterpart exists - there is no CheckBox row or ComboBox row. Where I currently just need to tell the compiler to "Add a ComboBoxColumn" I'd have to re-write so that every cell was generated individually.

Ideally I'd like a TransposableDataGridView which exposed all functionality of the DataGridView, with an additional bool property "Transposed". That way I could leave all of my code exactly as it is - I wouldn't have to change anything except for the type of the grid.

If nothing like this exists, I might just have to go and write it. (Should only take me a year or so! :)

解决方案

You can create new DataTable, add appropriate number of collumns and then copy values from one table to the other, just swap rows and colums.

I don't think you can set row header in the same way you can set column header (or at least I don't know how), so you can put the field names in separate colum.

DataTable oldTable = new DataTable();

...

DataTable newTable = new DataTable();

newTable.Columns.Add("Field Name");
for (int i = 0; i < oldTable.Rows.Count; i++)
    newTable.Columns.Add();

for (int i = 0; i < oldTable.Columns.Count; i++)
{
    DataRow newRow = newTable.NewRow();

    newRow[0] = oldTable.Columns[i].Caption;
    for (int j = 0; j < oldTable.Rows.Count; j++)
        newRow[j+1] = oldTable.Rows[j][i];
    newTable.Rows.Add(newRow);
}

dataGridView.DataSource = newTable;

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