asp.net - Required property in User Control -


i made user control parameters filled.

<uc1:graph id="uc1graph" runat="server" property1="name" property2="xvalue" />

now, question is:

  • how make property1 required field?

the developer must fill name of graph(property1), otherwise must not work , error message should appear in runtime, ooor better, in design mode

thank time ! :d


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