c# - 如何在 C# 中将查询结果作为字符串返回？

Question

下面的查询返回单个 VARCHAR 值，我想将此值作为字符串返回。我该怎么做？

代码片段：

string query = "SELECT " + FieldName + " FROM " + Table4 + " WHERE StartTime=" +
                    StartTime + " AND SystemId=" + SystemId + '"';
string result = "";

MySqlCommand cmd = new MySqlCommand(query, connection);
var reader = cmd.ExecuteReader();
while (reader.Read())
{
        result = ...  // set "result" to the output of the query here
}
return result;
}

标签： c#mysql

Answer 1

您可以创建一个列表并将值添加到列表中。返回列表后。