c# - LinqToSql returns null when using Single - not sequence contains no elements -

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संभव डुप्लिकेट:

मैंने इसे बदलने की कोशिश की। SINGLEOrDefault के बजाय सिंगल और वस्तु जो मैं वापस आती हूं वह शून्य है, 'अनुक्रम में कोई तत्व नहीं' त्रुटि होती है जब मैं एसक्यूएल प्रोफ़ाइलर का उपयोग करता हूं और उत्पन्न एसक्यूएल को कैप्चर करता हूं, तो मैं क्वेरी चलाता हूं और 1 परिणाम मिलता है। ऑब्जेक्ट रिक्त होने के कारण क्या होगा?

किसी भी मदद के लिए धन्यवाद, ~ ck

< P> शायद आपका फ़ील्ड / गुण मानचित्रण आपके डीबीएमएल में सही नहीं है


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