[英]C# asp.net Create multiple check box dynamically with value of mysql database
[英]Check if value in database table Asp.net C#
我有一個存儲過程,該過程將計算一個值在數據庫中的次數。 但是在到達(int)command.ExecuteScalar();
for循環后面的代碼中(int)command.ExecuteScalar();
循環停止並要求提供@ invoice2的參數。
存儲過程:
select count(*) as CountInvoice where invoice1=@invoice1 or @invoice2=@invoice`2
背后的代碼:
using (SqlCommand command = new SqlCommand("sp_Count", conn))
{
foreach (TextBox textBox in placehldr1.Controls.OfType<TextBox>())
{
count += 1;
command.CommandType = CommandType.StoredProcedure;
string invoice = textBox.Text.TrimEnd();
string parameter = string.Format("@invoice{0}", count);
command.Parameters.AddWithValue(parameter, invoice);
int invoiceCount = (int)command.ExecuteScalar();
if (invoiceCount > 0)
{
lblError.Text = "Invoice number already exist";
return;
}
command.Parameters.Clear();
}
這樣的事情會更好地起作用,因為它將兩個參數都考慮在內。
select count(*) as CountInvoice where invoice1=@invoice1 or invoice2=@invoice2
using (SqlCommand command = new SqlCommand("sp_Count", conn))
{
foreach (TextBox textBox in placehldr1.Controls.OfType<TextBox>())
{
count1 += 1;
count2 += 1;
command.CommandType = CommandType.StoredProcedure;
string invoice = textBox.Text.TrimEnd();
string parameter1 = string.Format("@invoice1", count1);
string parameter2 = string.Format("@invoice2", count2);
command.Parameters.AddWithValue(parameter, invoice);
int invoiceCount = (int)command.ExecuteScalar();
if (invoiceCount > 0)
{
lblError.Text = "Invoice number already exist";
return;
}
command.Parameters.Clear();
}
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