c# - 单击按钮时 Gridview 颜色不会改变

Question

我目前正在开发一个网页，只需单击一个按钮即可从 SQLdatasource 检索数据。我还包括一个突出显示特定行的功能。 它适用于页面加载，但不适用于单击按钮。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Timers;
using System.Drawing;

namespace WebApplication1
{
public partial class WebForm1 : System.Web.UI.Page
{

    protected void Page_Load(object sender, EventArgs e)
    {
        filterButton.Click += new EventHandler(this.filterButton_Click);
        prodTab.Rows[1].Cells[7].BackColor = Color.Red;

    }


    protected void filterButton_Click(object sender, EventArgs e)
    {

        string newQuery = "SELECT top 10 A.[LogOn],A.[Tcode],B.[Name],A.[Item],A.[ToLocation] AS [BIN],A.[Quantity],A.[ToStorageLocation] AS [Production Line],A." +
            "[Flag],A.[Remarks] FROM [IBusiness].[dbo].[SY_TransferOrderLog] A INNER JOIN" + " [IBusiness].[dbo].[ST_SY_User] B ON A.[UserId] = B.[UserId] WHERE " +
            "(Tcode ='T32' OR Tcode ='B32') And [LogOn] BETWEEN GETDATE()-1 AND GETDATE() and B.[User] = '" + TextBox1.Text + "' Order By LogOn desc";

        string command = SqlDataSource.SelectCommand; // added just for debug purpose
        SqlDataSource.SelectCommand = newQuery;

        prodTab.Rows[1].Cells[7].BackColor = Color.Red;
    }

}
}

Answer 1

确保在(重新)绑定(bind)数据到 GridView 后更改单元格颜色。

这适用于为单元格着色

prodTab.DataSource = source;
prodTab.DataBind();

prodTab.Rows[1].Cells[1].BackColor = Color.Red;

这不是因为它被默认值覆盖了。

prodTab.Rows[1].Cells[1].BackColor = Color.Red;

prodTab.DataSource = source;
prodTab.DataBind();