我目前正在尝试将一组缺少的 SQL 查询报告发布到我的网页上的下拉选择中。
我相信我的模型是正确的,但是即使我的控制器具有适当的语法,它将任何列表识别为 @HTML.DropDown 的一部分也存在一些问题。因此,应用程序在呈现网页之前崩溃。我希望这是一个简单的解决方法。
这是我要调用的函数的控制器代码:
public ActionResult FindDatMissingQuery()
{
HomeModel H = new HomeModel();
DropDownList ddl = new DropDownList();
ddl.DataSource = H.MissingQueryResults();
ddl.DataBind();
ViewData["MissingChem"] = ddl;
return View();
}
我的观点
@using (Html.BeginForm("FindDatMissingQuery","Home")){
@Html.ValidationSummary(true)
<fieldset>
<legend>Missing Chemistry Report</legend>
<br />
@Html.DropDownList("MissingChemistryReports", ViewData["MissingChem"] as SelectList)
</fieldset>
}
我的模型功能:
public List<string> MissingQueryResults()
{
//HomeModel Tolerances = new HomeModel();
List<String> nameList = new List<String>();
SqlCommand missingQuery = new SqlCommand("SELECT heatname FROM dbo.chemistrytable WHERE heatname NOT IN (SELECT heatname FROM dbo.chemistrytable WHERE sampletype = 'AVE') AND analysistime bewteen Dateadd(day, -1, Current_Timestamp) and Current_Timestamp AND heatname LIKE '[a,b,c,d]%' Order by heatname'");// + heatName + "'");
SqlCommand mainquery = new SqlCommand("SELECT analysisvalue.analysisid, heatname, analysistime, sampletype, grade, productid, element, value FROM dbo.AnalysisValue INNER JOIN dbo.ChemistryAnalysis ON dbo.AnalysisValue.AnalysisID = dbo.ChemistryAnalysis.AnalysisID Where heatname = '" + heatName + "' Order By analysisvalue.analysisid Asc, element");
using (SqlConnection conn = new SqlConnection(strSQLconnection))
{
missingQuery.CommandTimeout = 20000;
conn.Open();
missingQuery.Connection = new SqlConnection(strSQLconnection);
missingQuery.Connection.Open();
using (var reader = missingQuery.ExecuteReader())
{
int fieldCount = reader.FieldCount;
while (reader.Read())
{
for (int i = 0; i < fieldCount; i++)
{
nameList.Add(reader[i].ToString().Trim());
}
}
}return nameList;
任何帮助将非常感激!提前致谢。