.net 4.0 A potentially dangerous Request.Form value was detected from the client 的解决方案
<httpRuntime requestValidationMode="2.0" />这样 validate=false才会生效
<?xml version="1.0"?>
<!--
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<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0"/>
<pages controlRenderingCompatibilityVersion="3.5"
validateRequest="false" clientIDMode="AutoID"/>
<httpRuntime requestValidationMode="2.0" />
<customErrors mode="Off"/>
</system.web>
</configuration>