[英]How to return a query result as a string in C#?
下面的查詢返回單個 VARCHAR 值,我想將此值作為字符串返回。 我該怎么做?
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;
}
您可以創建一個列表並將值添加到列表中。 返回列表后。
如何將 VARCHAR 查詢結果作為字符串返回:
while (reader.Read())
{
results= reader.GetString(0); // Added this
}
return results;
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