How to add two CSS Class to control in the code behind?

I am setting 2 css class in the code behind in ASP.NET

I could either do:

txtBox.Attributes.Add("class", "myClass1");
txtBox.Attributes.Add("class", "myClass2");

it's always apply one Class .. How can i add thw two 开发者_StackOverflow社区classes ?

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The Add method is actually a Put, since it replaces the value behing the key "class". In HTML/css you can have several classes by separating with a space.

txtBox.Attributes.Add("class", "myClass1 myClass2");

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try

txtBox.Attributes.Add("class", "myClass1 myClass2");

I think this will work.

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You can also try

txtBox.CssClass = "myClass1 myClass2";

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try

txtBox.Attributes.Add("class", "my_Class1 my_Class2");