c# - ASP.NET GridView 在 BoundField 上使用 FindControl() 来操作字段

Question

我正在使用一个旧应用程序，该应用程序具有用于不同位置的硬编码列，现在正在添加新位置我决定尝试动态填充。该应用程序的一项功能是在状态被视为“不良”时显示红色文本和粗体文本。这是通过使用带有 TemplateFields 的选定行中的单元格中的“FindControl()”函数执行的。

既然我已经将其设置为使用绑定(bind)字段，那么我将如何在 DataBound 事件期间更改文本颜色、大小等？

BoundField 被添加到 GridView

        BoundField statusField = new BoundField();
        statusField.DataField = "ExceptionStatusCode";
        statusField.HeaderText = "Status";
        statusField.SortExpression = "ExceptionStatusCode";
        this.gvView.Columns.Add(statusField);
        

GridView 的数据绑定(bind)事件

    protected void gvView_DataBound(object sender, EventArgs e)
    {
        foreach (GridViewRow row in this.gvView.Rows)
        {
            //NO LONGER WORKS, NEED TO KNOW HOW TO REPRODUCE
            //WHAT IS BELOW FOR BOUND FIELD
            Label lblPartStatus = ((Label) row.Cells[StatusColumn].FindControl("lblPartStatus"));
            if (lblPartStatus.Text == "BAD")
            {
                lblPartStatus.ForeColor = System.Drawing.Color.Red;
                row.ToolTip = "One or more locations is missing information!";
                row.BackColor = System.Drawing.Color.Salmon;
            }
        }
    }

Answer 1

几年前，我编写了一些代码来帮助您使用列的 SortExpression、HeaderText 或 DataField 查找单元格索引。多年来，它为我节省了大量精力，您只需像 myRow.Cells[myRow.GetCellIndexByFieldHandle(myDataFieldName)]

那样调用它

---

public static class Utility
{
    /// <summary>
    /// Gets the ordinal index of a TableCell in a rendered GridViewRow, using a text fieldHandle (e.g. the corresponding column's DataFieldName/SortExpression/HeaderText)
    /// </summary>
    public static int GetCellIndexByFieldHandle(this GridView grid, string fieldHandle)
    {
        int iCellIndex = -1;

        for (int iColIndex = 0; iColIndex < grid.Columns.Count; iColIndex++)
        {
            if (grid.Columns[iColIndex] is DataControlField)
            {
                DataControlField col = (DataControlField)grid.Columns[iColIndex];
                if ((col is BoundField && string.Compare(((BoundField)col).DataField, fieldHandle, true) == 0)
                    || string.Compare(col.SortExpression, fieldHandle, true) == 0
                    || col.HeaderText.Contains(fieldHandle))
                {
                    iCellIndex = iColIndex;
                    break;
                }
            }
        }
        return iCellIndex;
    }

    /// <summary>
    /// Gets the ordinal index of a TableCell in a rendered GridViewRow, using a text fieldHandle (e.g. the corresponding column's DataFieldName/SortExpression/HeaderText)
    /// </summary>
    public static int GetCellIndexByFieldHandle(this GridViewRow row, string fieldHandle)
    {
        return GetCellIndexByFieldHandle((GridView)row.Parent.Parent, fieldHandle);
    }
}

---

获得单元格后，我建议您通过设置 Cell.CssClass 来操作它，然后使用 CSS 对其进行相应的样式设置。避开内联样式，这是您在设置 ForeColor、BackColor 等时得到的。