根据ASP.NET C＃中的条件更改gridview单元格的前景色 [英] Change forecolor of gridview cell based on condition in ASP.NET C#

问题描述

如果值为< = 0，我需要将gridview单元格颜色更改为红色。我已经尝试了下面的代码，它不占用每行的单元格值。



如何获取gridview的每个单元格值。



我尝试过的事情：



我正在使用下面的代码RowDataBound事件。

 if（e.Row.RowType == DataControlRowType.DataRow）
 {
 foreach（GridViewRow） GridView1.Rows中的行）
 {
 for（int i = 0; i< GridView1.Columns.Count; i ++）
 {
 TableCell cell = row.Cells [i ]。 
 int quantity = int.Parse（cell.Text）; 
 if（quantity< = 0）
 {
 cell.ForeColor = Color.Red; 
} 
} 
} 
} 
 

解决方案

你'非常接近...如果你想改变特定列的前景色，例如：Rate，请检查：

  protected   void  GridView1_RowDataBound（ object  sender， GridViewRowEventArgs e）
 {
  if （e.Row.RowType == DataControlRowType.DataRow）
 {
  //  抓住Label Control。 
 Label lblRate = e.Row.FindControl（  lblRate） as 标签; 
  //  从数据中获取此值 
  Double  rate = Convert.ToDouble（Convert.ToString（DataBinder.Eval（e.Row.DataItem， 率）））; 
  if （rate <  =。 0 ）
 {
  //  抓住该标签所在的单元格 
 DataControlFieldCell d = lblRate.Parent  as  DataControlFieldCell; 
  //  更改背景颜色 
 d.BackColor = System.Drawing 。红色; 
  //  像这样更改行颜色 
 e.Row.BackColor = System.Drawing.Color.LightBlue; 
  //  更改文本颜色 
 lblRate.ForeColor = System。 Drawing.Color.White; 
} 
} 
} 
 

有关详细信息，请参阅：如何制作Gridview行颜色/单元格颜色/文本颜色«魔鬼工作 [ ^ ]



您可能也对某种验证感兴趣：教程19：向编辑和插入接口添加验证控件 [ ^ ]

I need to change the gridview cell color to red if the value is <=0. I have tried the below piece of code and it doesn't take the cell value of each row.

How can I get each cell value of gridview.

What I have tried:

I am using the below piece of code in RowDataBound event.

if (e.Row.RowType == DataControlRowType.DataRow)
        {
            foreach (GridViewRow row in GridView1.Rows)
            {
                for (int i = 0; i < GridView1.Columns.Count; i++)
                {
                    TableCell cell = row.Cells[i];
                    int quantity = int.Parse(cell.Text);
                    if (quantity <= 0)
                    {
                        cell.ForeColor = Color.Red;
                    }
                }
            }
        }

解决方案

You're pretty close... If you would like to change forecolor for specific column, for example: "Rate", check this:

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        // grab the Label Control.
        Label lblRate = e.Row.FindControl("lblRate") as Label;
        // get the value from the datasoure like this
        Double rate = Convert.ToDouble(Convert.ToString(DataBinder.Eval(e.Row.DataItem, "Rate")));
        if (rate <= .0)
        {
            // grab the cell where that label resides
            DataControlFieldCell d = lblRate.Parent as DataControlFieldCell;
            // change the backcolor like this
            d.BackColor = System.Drawing.Color.Red;
            // change the row color like this
            e.Row.BackColor = System.Drawing.Color.LightBlue;
            // change the text color like this
            lblRate.ForeColor = System.Drawing.Color.White;
        }
    }
}

For further details, please see: How to make a Gridview Row Color/ Cell Color/ Text Color « Devils Work[^]

You might be interested in some sort of validation too: Tutorial 19: Adding Validation Controls to the Editing and Inserting Interfaces[^]

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