【问题标题】:How to color some specific cells in HTMLTable?如何为 HTMLTable 中的某些特定单元格着色?
【发布时间】:2012-02-16 02:50:11
【问题描述】:

我为我的公司开发了一个培训矩阵,该矩阵向所有员工展示了公司提供的所有培训课程。现在,我必须以一种易于管理员编辑和更新的方式开发它。我做的一切都是正确的,除了一件事是从第四个单元格到最后一个单元格给每组课程一个特定的颜色(因为我有 3 种类型的课程)。仅供参考,我有两个用于开发此矩阵的 SqlDataSource:

SqlDataSource1 用于检索 GroupID:

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
                ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
                SelectCommand="SELECT [ID] FROM [groups]"></asp:SqlDataSource>

而 SqlDataSource2 将从 SqlDataSource1 中获取 GroupID 并使用它来生成矩阵:

<asp:SqlDataSource ID="SqlDataSource2" runat="server"
                                            ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
                                            SelectCommandType="StoredProcedure" SelectCommand="kbiReport" FilterExpression="[Division] like '{0}%'">

                            <SelectParameters>
                                <asp:Parameter  Name="GroupID"/>
                            </SelectParameters>

                            <FilterParameters>
                                <asp:ControlParameter ControlID="ddlDivision" Name="DivisionName"
                                                         PropertyName="SelectedValue" Type="String" />
                            </FilterParameters>

            </asp:SqlDataSource>

现在,由于我使用的是 HTMLTable,我需要访问 SqlDataSource1 来执行一些逻辑,例如: 如果 GroupID = 1,则给这个组蓝色,依此类推。我可以通过执行以下操作来做到这一点:

我在 C# 中的代码隐藏:

protected void Page_Load(object sender, EventArgs e)
    {

        DataView dv2 = (DataView)SqlDataSource1.Select(DataSourceSelectArguments.Empty);
        foreach (DataRowView group in dv2)
        {
            SqlDataSource2.SelectParameters[0].DefaultValue = group[0].ToString();
            //create a new HtmlTable object
            HtmlTable table = new HtmlTable();

            DataView dv = (DataView)SqlDataSource2.Select(DataSourceSelectArguments.Empty);
            int columns = dv.Table.Columns.Count;
            int rows = dv.Count;

            //table's formating-related properties
            table.Border = 2;
            table.CellPadding = 3;
            table.CellSpacing = 3;
            table.Width = "900px";

            //to get the css style
            table.Attributes["class"] = "uGrid";

            //create a new HtmlTableRow and HtmlTableCell objects
            HtmlTableRow row;
            HtmlTableRow header = new HtmlTableRow();
            HtmlTableCell cell;


            //for adding the headers to the table
            foreach (DataColumn column in dv.Table.Columns)
            {
                HtmlTableCell headerCell = new HtmlTableCell("th");
                headerCell.InnerText = column.Caption;

                //The following if-else statements are for checking the GroupID and give each group
                //a specific color
                if (group[0].ToString().Equals("1"))
                    headerCell.BgColor = "lightBlue";
                else if (group[0].ToString().Equals("2"))
                    headerCell.BgColor = "lightYellow";
                else if (group[0].ToString().Equals("3"))
                    headerCell.BgColor = "Orange";

                //the header cells to the header
                header.Cells.Add(headerCell);
            }
            table.Rows.Add(header);

            //loop for adding rows to the table
            foreach (DataRowView datarow in dv)
            {
                row = new HtmlTableRow();
                //row.BgColor = "yellow";


                //loop for adding cells
                for (int j = 0; j < columns; j++)
                {
                    cell = new HtmlTableCell();
                    if (j < 4)
                    {
                        cell.InnerText = datarow[j].ToString();
                    }
                    else
                    {

                        CheckBox checkbox = new CheckBox();

                        int checkBoxColumns = dv.Table.Columns.Count - 5;
                        string fieldvalue = datarow[j].ToString();
                        string yes = fieldvalue.Split(new string[] { ", " }, StringSplitOptions.RemoveEmptyEntries)[1];
                        string courseid = fieldvalue.Split(new string[] { ", " }, StringSplitOptions.RemoveEmptyEntries)[0];
                        checkbox.ID = row.Cells[3].InnerText + "," + courseid.Trim();
                        checkbox.Checked = yes.Equals("Yes");
                        cell.Controls.Add(checkbox);

                    }

                    //add the cell to the current row
                    row.Cells.Add(cell);
                }

                //add the row to the table
                table.Rows.Add(row);
            }

            //add the table to the page
            PlaceHolder1.Controls.Add(table);

        }
    }

每组的课程数量不同,但着色应从第四个单元格开始直到最后一个单元格。我在上面代码的以下部分做了很多尝试,但我失败了,我不知道为什么。 那该怎么做呢?

//for adding the headers to the table
            foreach (DataColumn column in dv.Table.Columns)
            {
                HtmlTableCell headerCell = new HtmlTableCell("th");
                headerCell.InnerText = column.Caption;

                //The following if-else statements are for checking the GroupID and give each group
                //a specific color
                if (group[0].ToString().Equals("1"))
                    headerCell.BgColor = "lightBlue";
                else if (group[0].ToString().Equals("2"))
                    headerCell.BgColor = "lightYellow";
                else if (group[0].ToString().Equals("3"))
                    headerCell.BgColor = "Orange";

                //the header cells to the header
                header.Cells.Add(headerCell);
            }
            table.Rows.Add(header);

【问题讨论】:

    标签: c# asp.net


    【解决方案1】:

    我会使用 ListView 控件来构建 html 表来解决它。使用 ListView 控件,您可以访问 OnItemDataBound 属性,您可以使用该属性编写代码来为所需的特定行着色。

    【讨论】:

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