使用where子句绑定gridview不起作用 [英] Binding gridview with where clause does not work
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问题描述
I have a gridview filled with product information. SQL table looks like this:
ID||UserID||Name||Price||
and I want that the ID of the product matches with the id of the Users (User_ID). (I have a own SQL table with User Information).
I have this Code, but the gridview does not show something. Its just empty...
我尝试过:
What I have tried:
protected void BindGrid()
{ string constr = ConfigurationManager.ConnectionStrings["strConn"].ConnectionString;
using (SqlConnection conn = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand())
{ //Land ergänzen
cmd.Connection = conn;
cmd.CommandText = "SELECT * From Product WHERE UserID=@UserID";
cmd.Parameters.Add("@UserID", SessionHelper.User.ID);
using (SqlDataAdapter ad = new SqlDataAdapter(cmd))
{
DataTable dt = new DataTable();
ad.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
}
}
推荐答案
cmd.Parameters.Add("@UserID", SessionHelper.User.ID);
上面的命令将参数添加到SQL中,但不是值。您应该使用 SqlParameterCollection.AddWithValue Method(String ,Object)(System.Data.SqlClient) [ ^ ]。
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