Question

尝试为gridview创建自定义设置时出现问题。我有一个数据库设置如下：用户|颜色| TempID。我希望能够根据用户名在列表中显示时更改gridview颜色。所以我将用户Marcus添加到数据库中，颜色为#fef100。然而，当我尝试拉入设置时，我得到了这个：system.data.datarow而不是用户名marcus。以下是代码

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    string Settings = ConfigurationManager.ConnectionStrings["userthemes"].ConnectionString;
    SqlConnection con13 = new SqlConnection(Settings);
    SqlDataAdapter grid13 = new SqlDataAdapter("SELECT [User],[Colors], [TempID] FROM userthemes.dbo.[Colors]", con13);
    DataTable tools13 = new DataTable();
    grid13.Fill(tools13);
    DataTable alltools13 = new DataTable();
    GridView10.DataSource = tools13;
    GridView10.DataBind();

    Label9.Text = tools13.Rows[0].ToString();

    foreach (DataRow row in tools13.Rows)
    {
        foreach (var item in row.ItemArray)
        {
            if (e.Row.Cells[1].Text == (tools13.Rows[0].ToString()))
            {
                e.Row.Cells[0].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[1].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[2].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[3].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[4].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[5].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[6].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[7].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[8].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[9].BackColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[8].ForeColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
                e.Row.Cells[9].ForeColor = System.Drawing.ColorTranslator.FromHtml(tools13.Rows[1].ToString());
            }
        }
    }
}

Answer 1

您已经在tools13中循环所有行，您可以使用

e.Row.Cells[0].BackColor = System.Drawing.ColorTranslator.FromHtml(row["Colors"].ToString());

但是，由于用户可能只从查询返回一种颜色，因此您可以直接访问第一行而不使用foreach循环。

if (e.Row.RowType == DataControlRowType.DataRow)
{
    if (tools13.Rows.Count > 0)
    {
        e.Row.BackColor = ColorTranslator.FromHtml(tools13.Rows[0]["Colors"].ToString());
        //or by column index instead of by name
        e.Row.BackColor = ColorTranslator.FromHtml(tools13.Rows[0][1].ToString());
    }
}

当用户没有Colors = empty DataTable时，需要tools13.Rows.Count > 0以确保您没有获得index out of bounds。

ASP.NET Webform自定义设置

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