datagridview 中缺少外键列

Question

I want to retrieve all the data of a datatable in a datagridview.

dataGridView1.DataSource = dataTable1;

Ok, thats really simple but the problem is, that not all columns have been created. All the foreign-key-columns are missing. It seems to be the default-behaviour. I don´t want to turn off AutoGenerateColumns-property and create the columns manually.

Is there an easy way to generate really ALL columns in the datagridview?

Answer 1

I have found a solution that works for me ...

Responsible for the behaviour is the column-mapping-property of the column. Switching it from MappingType.Hidden to MappingType.Element prevents the internal column-generation-algorithm from filtering the column out.

List<DataColumn> ldc_recover = new List<DataColumn>(); 

foreach (DataColumn dataColumn in dataTable1.Columns)
{
    if (dataColumn.ColumnMapping == MappingType.Hidden)
    {
        dataColumn.ColumnMapping = MappingType.Element;
        ldc_recover.Add(dataColumn);
    }
}

// Fill the datagridview with data from datatable
dataGridView1.DataSource = dataTable1;

// Restore the previous columnmapping-property
foreach (DataColumn dc_enum in ldc_recover)
{
    dc_enum.ColumnMapping = MappingType.Hidden;
}