輸入字符串格式不正確var row = db.QuerySingle（sqlSelect，id）;

Question

代碼：

@{ 
var id = UrlData[0]; 
if (id.IsEmpty()){ 
    Response.Redirect(@Href("~/surveydata")); 
} 

var db = Database.Open("StarterSite"); 

if (IsPost){ 
    var sqlDelete = "DELETE FROM PatientSurvey WHERE ID=@0"; 
    db.Execute(sqlDelete, id); 
    Response.Redirect("~/surveydata"); 
} 

var sqlSelect = "SELECT * FROM PatientSurvey WHERE ID=@0"; 
var row = db.QuerySingle(sqlSelect, id); 
} 

<p>Are we sure we want to delete the following record? @id</p> 
<p> 
<form action="" method="post"> 
    <input type="button" onclick="document.location.href='surveydata.cshtml';" value="Cancel" /> 
    <input type="submit" value="Delete" /> 
</form> 
</p> 

線：

第18行：VAR的SQLSelect = 「SELECT * FROM PatientSurvey WHERE ID = @ 0」;
第19行：var row = db.QuerySingle（sqlSelect，id）;

堆棧跟蹤：
[出現FormatException：0：surveydata.cshtml - 輸入字符串的不正確的格式。]
System.Data.SqlServerCe.SqlCeCommand.FillParameterDataBindings（布爾verifyValue）1244
System.Data .SqlServerCe.SqlCeCommand.ExecuteCommand（的CommandBehavior行爲，字符串方法，ResultSetOptions選項）569
System.Data.SqlServerCe.SqlCeCommand.ExecuteDbDataReader（的CommandBehavior行爲）19
System.Data.Common.DbCommand.ExecuteReader（）12
WebMatrix.Data.d__0.MoveNext（）+152
System.Linq.Enumerable.FirstOrDefault（IEnumerable的1 source) +164
WebMatrix.Data.Database.QuerySingle(String commandText, Object[] args) +103
ASP._Page_delete_cshtml.Execute() in c:\Users\Matt\Documents\My Web Sites\Scott New PTSSM\delete.cshtml:19
System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +197
System.Web.WebPages.WebPage.ExecutePageHierarchy(IEnumerable 1執行人）69
System.Web.WebPages.WebPage.ExecutePageHierarchy（）151
System.Web.WebPages.WebPageBase.ExecutePageHierarchy（WebPageContext pageContext中，TextWriter的作家，WebPageRenderingBase起始頁）+76
System.Web.WebPages.WebPageHttpHandler.ProcessRequestInternal（HttpContextBase的HttpContext）+114

Answer 1

我想你需要留有空格，像這樣：

var sqlSelect = "SELECT * FROM PatientSurvey WHERE ID = @0"; 

乾杯