While i am creating the Content Types using the Declarative XML . i got the couple of exception.
the below example is one among them.
the below example is one among them.
Error occurred in deployment step 'Activate Features': Key cannot be null. Parameter name: key
The Reason behind the Exception is while defining the site columns for the content types we have to specify like this.
<FieldRef ID ="{860deaeb-80cd-4a22-ab0d-31e49b67ac90}" Name ="SiteCol1" DisplayName ="SiteCol1" Required ="TRUE" />
<ContentType ID="0x0100da3896467d2d4af085f58a0fa1c22703" Inherits ="TRUE" Group ="MyCTGrp" Name ="CT1" Overwrite ="TRUE" Description ="This content type is used for the....">
<FieldRefs >
<FieldRef ID ="{860deaeb-80cd-4a22-ab0d-31e49b67ac90}" Name ="SiteCol1" DisplayName ="SiteCol1" Required ="TRUE" />
</FieldRefs>
</ContentType>
If we defined as <FieldRef ID ="{860deaeb-80cd-4a22-ab0d-31e49b67ac90}" Name ="SiteCol1" DisplayName ="SiteCol1" Required ="TRUE" > </FileRef>.
If we Close like this it will considered as null.
while adding Visual webpart into page am getting error as“Key cannot be null. Parameter name: Key ”can anyone help me out how to resolve this error?
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