[提问]：GridView 改变单元格字体颜色及背景颜色

Question

环境：VS2008,C#
问题：
      从数据库中提取表信息填充到单元格内，数据表里有条时间记录(格式：YYY-MM-DD）读取到GridView后，我想通过判断当前时间改变日期字体颜色 或者单元格背景色，比如，表中时间>当前时间，显示为蓝色字体，否则显示为红色字体，或者修改单元格背景色为红色或者蓝色，请兄弟姐妹告诉怎么实现

Answer 1

加入IF判断语句，在前台加入，像<% if(1>2)%>  <%{%>  1不大于2 <%}%>

Answer 2

if (e.Row.RowType == DataControlRowType.DataRow)
            {
if(时间>系统时间){
                e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#00A9FF';");}
else
{
                e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor =currentcolor");
            }
}

Answer 3

判断时间呗  时间判断过以后想改变颜色的话加个<span>标签就可以了

Answer 4

不好意思，上面是鼠标悬浮的颜色，适当改下就可以，
e.Row.Attributes.Add("this.style.backgroundColor", "#00A9FF");}

Answer 5

在RowDataBind中判断。<asp:GridView ID="GridView1" runat="server" OnRowDataBound="GridView1_RowDataBound">
        </asp:GridView>public class Demo
        {
            public string ID { set; get; }
            public DateTime Time { set; get; }
        }        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                this.GridView1.DataSource = new System.Collections.Generic.List<Demo>()
                { 
                      new Demo(){ ID="S001", Time=DateTime.Now.AddDays(-1)},
                      new Demo(){ ID="S002", Time=DateTime.Now.AddDays(1)},
                      new Demo(){ID="S003", Time=DateTime.Now.AddDays(-2)},
                      new Demo(){ID="S004", Time=DateTime.Now.AddDays(2)},
                      new Demo(){ID="S005", Time=DateTime.Now.AddHours(2)},
                      new Demo(){ID="S006", Time=DateTime.Now.AddHours(1)},
                };
                this.GridView1.DataBind();
            }
        }        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                if (e.Row.RowState == DataControlRowState.Alternate || e.Row.RowState == DataControlRowState.Normal)
                {
                    DateTime time = Convert.ToDateTime(DataBinder.Eval(e.Row.DataItem, "Time"));
                    if (time > DateTime.Now)
                    {
                        e.Row.Cells[1].Attributes.Add("style", "background:blue;");
                    }
                    else
                    {
                        e.Row.Cells[1].Attributes.Add("style", "background:red;");
                    }
                }
            }
        }