C# DataGridView 列顺序

Question

In my application, I have a DataGridView which it's data source varies depening on the button you click. EG Clicking 'Total Downloads' it will be:

dataGridView1.DataSource = totalDownloads();

Or the downloads per player

dataGridView1.DataSource = playerDownloads();

Each method obtains data via SQL query and returns a dataTable of this information.

However, with my following code:

dataGridView1.DataSource=getStats();
public DataTable getStats()
   {
        DataTable table1 = new DataTable("Totals");
        table1.Columns.Add("Park Name");
        table1.Columns.Add("Author");
        table1.Columns.Add("Total Downloads");
        table1.Columns[2].DataType = typeof(int);
        table1.Columns.Add("Rating (Max 5)");           
        table1.Columns[3].DataType = typeof(float);
        table1.Rows.Add(name,author,download, rating);
        }
        return table1;
    }

I expected to see the colums in the order: "Park Name" "Author" "Total Downloads" "Rating" However, they come in "Downloads", "Park Name", "Author", "Rating"

I've read that adding: dataGridView1.AutoGenerateColumns = false; will fix this...however, this makes no difference to the order at all...

thanks for the help!

Answer 1

Is this a WinForms project or an Asp.net one?

If it's winforms you should be able to change the order the columns are displayed in by accessing your GridViews Columns DisplayIndex

    dataGridView1.Columns["Park Name"].DisplayIndex = 0; // or 1, 2, 3 etc

Answer 2

My simple solution to the columns being out of order is to add this loop that sets the DisplayIndex to the Index .

foreach (DataGridViewColumn col in grid.Columns) {
    col.DisplayIndex = col.Index;
}

The Index is assigned to each column as they are added. I'm not sure why the DisplayIndex becomes out of order, but the above script will fix it.

This might work as well as a one-liner:

grid.Columns.foreach(c => c.DisplayIndex = c.Index);

Answer 3

For me it did not the trick. One more line needed:

entityDataGridView.AutoGenerateColumns = false;

Regards!

Answer 4

Try to play with the display index like this

 private void AdjustColumnOrder()
{
    customersDataGridView.Columns["Park Name"].DisplayIndex = 0;
    customersDataGridView.Columns["Author"].DisplayIndex = 1;
    customersDataGridView.Columns["Total Downloads"].DisplayIndex = 2;
}

Answer 5

I had the same problem. I solved with:

dataGridView.DataSource = null;
dataGridView.DataSource = MyDataTable;

Answer 6

I found this to be very helpful.

Usage: ColumnDisplayOrder("Park Name, Author, Total Downloads", myDataGridView);

    private void ColumnDisplayOrder(string columnList, DataGridView gridView)
    {
        var columnListArray = columnList.Split(',');
        for (var i = 0; i < columnListArray.Length; i++)
        {
            var gridViewColumn = gridView.Columns[columnListArray[i].Trim()];
            if (gridViewColumn != null)
                gridViewColumn.DisplayIndex = i;
        }
    }

Answer 7

I had the same issue and found the reason. It's due to the order of the class properties:

   public string Downloads { get; set; }
   public string ParkName { get; set; }
   public string Author { get; set; }
   public float Rating { get; set; }

gives you Downloads, Park Name, Author, Rating

If you rearrange them, the order should be like you'd expect it.

Answer 8

I had the same problem with column order in datagrid, in my project data source was list of objects, through designer I added column in right order, but when I started application order was mixed. As I added binding on my properties from class I noticed that my properties are in wrong order in regard to column order in datagrid, so I added properties in class in same order like I added columns and I got correct order even if AutoGenerateColumns is set to true .