将参数发送到另一个页面时出错 [英] Error in send parameter to another page

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问题描述


抱歉,我说英语不多

i有两个页面名称finder.aspx和defualt2.aspx

i am使用下面的代码,我发送将参数发送到default2.aspx以便在数据库中搜索

 StringBuilder s =  new  StringBuilder(); 
List< string> i = new List< string>();
foreach (ListItem l in CheckBoxList1.Items)
{
if (l.Selected == true
i.Add(l.Value);
}
for int j = 0 ; j < i.Count; j ++)
{
if (s.Length > 0
s.Append(< span class =code-string> );
s.Append(i [j] .ToString());
// Label1.Text = s.ToString();
}
Response.Redirect( Default2.aspx?s = + s.ToString()) ;


页面上的
Default2.aspx以下代码检索用于的参数

  string  s; 
s = Request.QueryString [ s];
SqlDataSource2.SelectParameters [ idbrand]。DefaultValue = s.ToString();



和搜索SQL代码

 SelectCommand =   SELECT id,idbrand,fname,camera,os,cameratype,ostype,price FROM tproduct WHERE(idbrand IN(@idbrand))> ; 

但是,参数发送Default2.aspx?s = 1, 2 错误
转换失败 转换 nvarchar ' 1,2' 数据类型 int

谢谢

解决方案

您不能将值列表作为参数字符串传递给SQL - 它不起作用,因为IN子句是在参数替换之前的阶段处理的。



这里有一个描述和解决方案:在SQL IN子句中使用逗号分隔值参数字符串 [ ^ ]

Hi Sorry i do not speak much English
i have two pages names finder.aspx and defualt2.aspx
i am using the following code, i send send parameters to default2.aspx for search in database

StringBuilder s = new StringBuilder();
List<string> i = new List<string>();
foreach (ListItem l in CheckBoxList1.Items)
{
    if (l.Selected == true)
        i.Add(l.Value);
}
for (int j = 0; j < i.Count; j++)
{
    if (s.Length > 0)
        s.Append(",");
   s.Append(i[j].ToString());
   //Label1.Text = s.ToString();
}
Response.Redirect("Default2.aspx?s="+s.ToString());


on the page Default2.aspx the following code to retrieve the parameters used to

string s;
s = Request.QueryString["s"];
SqlDataSource2.SelectParameters["idbrand"].DefaultValue = s.ToString();


and SQL Code for Search

SelectCommand="SELECT id, idbrand, fname, camera, os, cameratype, ostype, price FROM tproduct WHERE (idbrand IN (@idbrand))">

but,parameters send Default2.aspx?s=1,2 error 
Conversion failed when converting the nvarchar value '1,2' to data type int. 

thank

解决方案

You can't pass a list of values into SQL as a parameter string - it doesn't work like that because the IN clause is processed at a stage before parameter substitution.

There is a description and solution here: Using comma separated value parameter strings in SQL IN clauses[^]


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