0
请检查下面的C#代码,并让我知道我出错的地方。下面是我遇到:SQL Server中的C#CheckBoxList更新
1)如果我空在SQL Server中SendReport
柱和加载页面时,会自动SendReport
被填充了1
2的第二行),我可以放置一个复选标记,单击该按钮,然后SendReport
值成功填充到SQL Server中。但是,如果我取消选中它们中的任何一个并单击该按钮,则值都不会从1更改为0.请帮助!
$<asp:CheckBoxList ID="CheckBoxList1" runat="server">
</asp:CheckBoxList>
<br />
<asp:Button ID="Button1" runat="server" Text="Save Changes" OnClick="Button1_Click" />
<br />
BACKPAGE:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindCheckBoxList();
}
}
// Setting up the ConnectionString
public string GetConnectionString()
{
return System.Configuration.ConfigurationManager.ConnectionStrings["IPdataConnectionString"].ConnectionString;
}
// Binding the CheckBoxList with Data
private void BindCheckBoxList()
{
DataTable dt = new DataTable();
SqlConnection connection = new SqlConnection(GetConnectionString());
try
{
connection.Open();
string sqlStatement = "SELECT Partner, ID, SendReport FROM Rorts";
SqlCommand sqlCmd = new SqlCommand(sqlStatement, connection);
SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd);
sqlDa.Fill(dt);
if (dt.Rows.Count > 0)
{
CheckBoxList1.DataSource = dt;
CheckBoxList1.DataTextField = "Partner"; // the items to be displayed in the list items
CheckBoxList1.DataValueField = "SendReport"; // the id of the items displayed
CheckBoxList1.DataBind();
//Setting the Selected Items in the ChecBoxList based from the value in the database
//to do this, lets iterate to each items in the list
for (int i = 0; i < dt.Rows.Count; i++)
{
if (!string.IsNullOrEmpty(dt.Rows[i]["SendReport"].ToString()))
{
CheckBoxList1.Items[i].Selected = Convert.ToBoolean(dt.Rows[i]["SendReport"]);
}
}
}
}
catch (System.Data.SqlClient.SqlException ex)
{
string msg = "Fetch Error:";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
connection.Close();
}
}
// Creating the Method for Saving the CheckBoxList Selected Items to the database
private void Update(string name, bool SendReport)
{
SqlConnection connection = new SqlConnection(GetConnectionString());
SqlCommand cmd;
string sqlStatement = string.Empty;
try
{
// open the Sql connection
connection.Open();
sqlStatement = "UPDATE Rorts SET SendReport = @SendReport WHERE Partner = @Partner";
cmd = new SqlCommand(sqlStatement, connection);
cmd.Parameters.AddWithValue("@Partner", name);
cmd.Parameters.AddWithValue("@SendReport", SendReport);
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
}
catch (System.Data.SqlClient.SqlException ex)
{
string msg = "Insert/Update Error:";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
// close the Sql Connection
connection.Close();
}
}
// Calling the Method for Saving the state of CheckBoxList selected items
protected void Button1_Click(object sender, EventArgs e)
{
string PartnerName = string.Empty;
for (int i = 0; i < CheckBoxList1.Items.Count; i++)
{
if (CheckBoxList1.Items[i].Selected)
{
PartnerName = CheckBoxList1.Items[i].Text;
Update(PartnerName, CheckBoxList1.Items[i].Selected);
}
}
//ReBind the List to retain the selected items on postbacks
BindCheckBoxList();
}
你一直在这里已经足够长,知道你应该接受你的问题的答案... – JNK
我已经问了多次如何做到这一点,没有人会告诉我。 –
选中正确答案下面的复选框。另见这里:http://stackoverflow.com/faq#howtoask – JNK