dart double type doesn't allow fixed format -

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मैं निम्नलिखित कोड का उत्पादन करता हूं: 

  [v.bankClosingBalance, 0.00]। पहलेवाले ( (मान) = & gt; मान! = नल)   
 और त्रुटि प्राप्त करें:  
  अपवाद: अनचाहे त्रुटि: प्रकार 'डबल' का कोई उपप्रकार नहीं है 'मान' का 'स्ट्रिंग' टाइप करें   
 जो ठीक है क्योंकि यह मुझे इसकी दोहरी बताता है समस्या एक डबल के रूप में है जो मुझे करने में सक्षम होना चाहिए:  
  [v.bankClosingBalance, 0.00]। पहलेवाले ((मान) = & gt; मूल्य! = शून्य) .toStringAsFixed (2)   
 लेकिन यह मुझे त्रुटि देता है:  
  अपवाद: अनचाहे त्रुटि: 'int' प्रकार 'मान' का 'स्ट्रिंग' प्रकार का एक उपप्रकार नहीं है।   
 अगर मैं इसके चारों ओर दोहरी पीढ़ी का उपयोग करता हूं तो यह अभी भी 'डबल' को छोड़कर कहता है।  
 मुझे यहाँ क्या याद आ रही है?   
 
 
 मुझे पूरा यकीन है  v.bankClosingBalance  आपकी अपेक्षाओं को वापस नहीं लौटाता है। 
 मैं इस समस्या को पुन: उत्पन्न नहीं कर पा रहा हूं।

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