asp.net实例操作显示及隐藏GridView列头的方法(2)

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
    // For the header row add a link button to each header
    // cell which can execute a row command
    if (e.Row.RowType == DataControlRowType.Header)
    {
        // Loop through each cell of the header row
        for (int columnIndex = 0; columnIndex < e.Row.Cells.Count; columnIndex  )
        {
            LinkButton hideLink = new LinkButton();
            hideLink.CommandName = "hideCol";
            hideLink.CommandArgument = columnIndex.ToString();
            hideLink.Text = "-";
            hideLink.CssClass = "gvHideColLink";
            hideLink.Attributes.Add("title", "Hide Column");

            // Add the "Hide Column" LinkButton to the header cell
            e.Row.Cells[columnIndex].Controls.AddAt(0, hideLink);

            // If there is column header text then
            // add it back to the header cell as a label
            if (e.Row.Cells[columnIndex].Text.Length > 0)
            {
                Label columnTextLabel = new Label();
                columnTextLabel.Text = e.Row.Cells[columnIndex].Text;
                e.Row.Cells[columnIndex].Controls.Add(columnTextLabel);
            }
        }
    }

    // Hide the column indexes which have been stored in hiddenColumnIndexes
    foreach(int columnIndex in hiddenColumnIndexes)
        if (columnIndex < e.Row.Cells.Count)
            e.Row.Cells[columnIndex].Visible = false;
}

在SetupShowHideColumns 方法中创建"Show Columns"下拉菜单，以前被隐藏的列名被添加到"Show Columns"下拉菜单选项中。