OleDbParameterCollection 只接受非空的 OleDbParameter 类型对象，不接受 Int32 对象。

[frank2828]

这个是数据库访问
/// <summary>
/// 根据产品ID删除数据
/// </summary>
/// <param name="id">产品ID</param>
/// <returns></returns>
public bool Delete_prod_news_ByID(int id)
{

try
{
string sqlStr = "delete from prod_news where ID=" + id;
OleDbCommand cmd = new OleDbCommand(sqlStr, con);
OleDbParameter par = new OleDbParameter("@ID", OleDbType.Integer);
par.Value = id;
cmd.Parameters.Add(id);
con.Open();
if (cmd.ExecuteNonQuery() > 0)
{
return true;
}
return false;
}
catch (Exception we)
{

throw we;
}
finally
{
con.Close();
}


这个是业务处理
protected void imgBtnDel_Click(object sender, ImageClickEventArgs e)
{
int id = Convert.ToInt32(((ImageButton)sender).CommandArgument);
if (papSer.Delete_prod_news_ByID(id))
{
Page.ClientScript.RegisterClientScriptBlock(typeof(string),"","<script>alert('删除成功')</script>");
}
else
{
Page.ClientScript.RegisterClientScriptBlock(typeof(string), "", "<script>alert('删除失败')</script>");
}
}

[事理]

只能说你好粗心?

string sqlStr = "delete from prod_news where ID=" + id;
OleDbCommand cmd = new OleDbCommand(sqlStr, con);
//OleDbParameter par = new OleDbParameter("@ID", OleDbType.Integer);
//par.Value = id;
//cmd.Parameters.Add(id);
你sql语句都没添加@ID参数,下面为什么要参数化sql语句,注释掉就行了.

[dalmeeme]

改成：
string sqlStr = "delete from prod_news where ID=?";
OleDbCommand cmd = new OleDbCommand(sqlStr, con);
OleDbParameter par = new OleDbParameter("?", OleDbType.Integer);
par.Value = id;
cmd.Parameters.Add(par);
con.Open();