CODEWITHSUNDEEP
c#datagrid
John Threepwood
John Threepwood

Reputation: 16143

How to create a variable number of columns for a DataGrid table?

How can I create a DataGrid table with a variable number of columns?

Example: Assuming we have a list of integer lists List<List<int>>. All inner lists have the same length n. Now I would like to create a row per integer list and for each integer an extra column.

For example: For the two integer lists {1, 2, 3} and 4, 5, 6 the DataGad would look like this:

1 | 2 | 3
--+---+---
4 | 5 | 6

Normally, I create an own class for my DataGrid row elements, like 

class MyDataGridRecord {
  public int first { get; set; }
  public int second { get; set; }
  ...
}

But since I do not know how many columns I have, I can not write such a class with a fixed number of fields.

Upvotes: 0

Views: 549

Answers (1)

Selman Gen&#231;
Selman Gen&#231;

Reputation: 101681

I suppose you can do something like this:

var list = new List<List<int>>
        {
            new List<int>() {2, 3, 4, 5},
            new List<int>() {2, 3, 4, 5},
            new List<int>() {2, 3, 4, 5},
            new List<int>() {2, 3, 4, 5}
        };

var columnCount = list[0].Count;

for (int i = 0; i < columnCount; i++)
{
     dataGridView1.Columns.Add(i.ToString(),"Column " + i+1);
}
for (int k = 0; k < list.Count; k++)
{
   dataGridView1.Rows.AddCopy(0);
}


for (int k = 0; k < list.Count; k++)
{
      for (int i = 0; i < list[k].Count; i++)
      {
            dataGridView1.Rows[k].Cells[i].Value = list[k][i];
      }
}

Upvotes: 1

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