c＃ultragrid：索引超出范围错误

Question

我在以下行中收到错误：

  

索引超出范围异常 - 索引超出范围。必须是非   负数且小于集合的大小

UltraGridColumn col = grid.DisplayLayout.ColScrollRegions[0].VisibleHeaders[0].Header.Column;

Answer 1

可见标头集合更可能抛出索引超出范围的异常。如果不在视图范围内，您将无法获得任何列标题。

    private void Form1_Load(object sender, EventArgs e)
    {
        // In case you don't have any initialized column
        UltraGridColumn column = this.ultraGrid1.DisplayLayout.Bands[0].Columns.Add();

        if (!column.IsVisibleInLayout)
        {
            // In order to scroll to particular column, if it is not in view
            this.ultraGrid1.DisplayLayout.ColScrollRegions[0].ScrollColIntoView(column); 
        }

        UltraGridColumn visibleColumn = this.ultraGrid1.DisplayLayout.ColScrollRegions[0].VisibleHeaders[0].Header.Column;
    }