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“System.Web.UI.WebControls.Literal”不允许使用子控件

今天在写下面的代码时遭遇错误——“System.Web.UI.WebControls.Literal”不允许使用子控件(‘System.Web.UI.WebControls.Literal‘ does not allow child controls):

var postBodyDiv = new HtmlGenericControl(){    ID = "cnblogs_post_body",    ClientIDMode = ClientIDMode.Static,    TagName = "div",    InnerHtml = body};var signatureDiv = new HtmlGenericControl(){    ID = "signature",    TagName = "div"};literalBody.Controls.Add(postBodyDiv);literalBody.Controls.Add(signatureDiv);

literalBody的类型是System.Web.UI.WebControls.Literal。将postBodyDiv与signatureDiv作为子控件添加到literalBody中,是为了避免字符串拼接带来的内存消耗。

之前字符串拼接的代码如下:

literalBody.Text = "<div id=\"cnblogs_post_body\">" + body + "</div><div id=\"signature\"></div>";

本来这不是问题,把类型由Literal改为Label就行了,但是实际场景不允许这么做,必须要用Literal。

后来采取了在literalBody的父控件中动态添加postBodyDiv与signatureDiv的方法解决了问题,代码如下:

var postBodyDiv = new HtmlGenericControl(){    ID = "cnblogs_post_body",    ClientIDMode = ClientIDMode.Static,    TagName = "div",    InnerHtml = body};var signatureDiv = new HtmlGenericControl(){    ID = "signature",    TagName = "div"};var bodyControlIndex = this.Controls.IndexOf(literalBody);if (bodyControlIndex >= 0){    Controls.AddAt(bodyControlIndex, postBodyDiv);    Controls.AddAt(bodyControlIndex + 1, signatureDiv);}

“System.Web.UI.WebControls.Literal”不允许使用子控件