c# - 返回一个用ajax写入的HtmlTable

Question

我想以编程方式在Web服务的代码后面构建一个HtmlTable/Table，并将其作为HTML字符串返回，以便可以使用JavaScript将其写入span/div/whatever的innerhtml

类似于以下内容:

//webservice.amsx.cs Build the table, called by another/different method
protected string Table_Maker()
{   
HtmlTable tbl = new HtmlTable();
HtmlTableCell cell = new HtmlTableCell();
HtmlTableRow row = new HtmlTableRow();
cell.InnerText = "WhateverText";    
row.Cells.Add(cell);
tbl.Rows.Add(row);

return tbl.ToString();
}

//somepage.aspx write table to the div
function menuHelper(toplayer, toplayernumber) 
{
    var sublayertable;
    var sublayerpostcompileID;
    var toplayernumber;

    menuHelper_Part1();

    function menuHelper_Part1() 
    {

    //replace ucMainMenu with ucMainMenu_pnlContent
    sublayerpostcompileID = toplayer.replace("ucMainMenu", "ucMainMenu_pnlContent");
    //Call the webmethod
    webbernetz.MenuHelperWebService.Sub_Menu_Helper(toplayernumber, menuHelper_Part2);                  
    }

    function menuHelper_Part2(result){
    //Write the result to the target area
    document.getElementById(sublayerpostcompileID).innerHTML = result;
    }
}

当我将其返回给 javascript 时，javascript 只会写入“System.Web.UI.HtmlControls.HtmlTable”。

如何让它编写实际的表格？

Answer 1

代码的唯一问题是使用tbl.ToString()。

正如其他一些帖子中所述，您应该使用 HtmlTextWriter 将表格控件渲染到 StringBuilder 对象，然后该对象可以返回您的方法的字符串值。像这样的事情:

protected string Table_Maker() {
    HtmlTable tbl = new HtmlTable();
    HtmlTableCell cell = new HtmlTableCell();
    HtmlTableRow row = new HtmlTableRow();
    cell.InnerText = "WhateverText";
    row.Cells.Add(cell);
    tbl.Rows.Add(row);

    StringBuilder sb = new StringBuilder();
    using( StringWriter sw = new StringWriter( sb ) ) {
        using( HtmlTextWriter tw = new HtmlTextWriter( sw ) ) {
            tbl.RenderControl( tw );
        }    
    }    
    return sb.ToString();
}

这应该返回要插入到您的页面中的 HTML。