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[英]Send C# datetime to SQL Server - error “Conversion failed when converting date and/or time from character string”
[英]Error: Conversion failed when converting datetime from character string .NET SQL Server
我知道之前曾有人問過這個問題,但是經過前面回答的問題之后,我仍然不太明白這段代碼有什么問題。
僅供參考,我在英國。
public static void GetDataForCSEP(string viewName, string schemaName,
string dateFieldName, DateTime startDate, DateTime endDate)
{
string dateFormat = "yyyy/MM/dd HH:mm:ss";
//Connect to SQl Server
string commandText = "SELECT * FROM " + schemaName + "." + viewName + " WHERE @dateFieldName BETWEEN @startDate AND @endDate";
using (SqlCommand sqlCmd = new SqlCommand(commandText,sql_Conn))
{
sqlCmd.CommandType = CommandType.Text;
sqlCmd.Parameters.Add("@dateFieldName",SqlDbType.NVarChar, 30).Value = dateFieldName;
sqlCmd.Parameters.Add("@startDate", SqlDbType.DateTime).Value = DateTime.Parse(startDate.ToString(dateFormat));
sqlCmd.Parameters.Add("@endDate", SqlDbType.DateTime).Value = DateTime.Parse(startDate.ToString(dateFormat));
sql_Conn.Open();
sqlCmd.ExecuteNonQuery();
}
}
出現錯誤時,您無法將列名作為參數傳遞
"SELECT * FROM " + schemaName + "." + viewName + "
WHERE @dateFieldName BETWEEN @startDate AND @endDate";
這應該是
"SELECT * FROM " + schemaName + "." + viewName + "
WHERE " + dateFieldName + " BETWEEN @startDate AND @endDate";
為了避免sqlInjection攻擊,請使用Sp_executeSQL
來執行這種類型的查詢,因為這是動態sql查詢。
這將取決於您的SQL Server語言環境設置,但也許
string dateFormat = "dd-MMM-yyyy HH:mm:ss";
會為你工作嗎?
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