asp.net c# webform ORA-01008: 并非所有变量都已关联，值为null报错
原因：值为null，看看从哪里开始没有得到值吧``比如
StringBuilder whereSql = new StringBuilder();whereSql.Append("SELECT count(*) as username FROM ");whereSql.Append("dzjc.dzjc_yhmc ");whereSql.Append("WHERE ");whereSql.Append("username=:userName ");whereSql.Append("and ");whereSql.Append("pwd=:pwd ");//构建SqlOracleParameter[] oParams = { new OracleParameter(":userName",OracleType.VarChar),new OracleParameter(":pwd",OracleType.VarChar)};oParams.Value = userName;oParams.Value = pwd;
pwd为null的话会造成这个错误
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