我想检查未绑定的数据网格中的每一行，如果单元格值等于文本框值，那么不要添加行
使用foreach循环
现在的问题是，iam使用未绑定的数据网格，并且无法在foreach循环中使用ItemSource 如果我运行下面的代码，我会报错： System.InvalidCastException：'无法将类型为'MyMasrof'的对象转换为类型为'System.Data.DataRow'。”
这是我的代码：
private void AddMaterial_btn_Click(object sender, RoutedEventArgs e)
{
if (Materials_Lookup.Text == null)
{
MessageBox.Show("Choose Item First");
}
else
{
if (Masrof_Grid.Items.Count > 0)
{
foreach (System.Data.DataRow dr in Masrof_Grid.Items)
{
if (dr["Masrof_Material_Name"].ToString() == StoreName_txt.Text)
{
MessageBox.Show("Item Already Exist");
}
else
{
MySqlConnection conn2 = new MySqlConnection("DataSource='" + DoSomething.Server_Param + "';UserID='" + DoSomething.Uid_Param + "';Password='" + DoSomething.Password_Param + "';Database='" + DoSomething.Database_Param + "';PORT=3306;CHARSET=utf8");
conn2.Open();
MySqlCommand cmd = new MySqlCommand();
MySqlDataReader rd;
DataSet ds = new DataSet();
ds.Clear();
cmd.Connection = conn2;
cmd.CommandText = "SELECT id FROM Items where Item_Arabic_Name ='" + Materials_Lookup.Text + "'";
rd = cmd.ExecuteReader();
if (rd.Read())
{
Masrof_Grid.Items.Add(new MyMasrof()
{
Masrof_Material_Code = (rd["id"].ToString()),
Masrof_Material_Name = Materials_Lookup.Text,
Masrof_MAterial_QTY = QTY_txt.Text,
Masrof_Material_Store = StoreName_txt.Text,
MAterial_Curr_Balance = CurrBalance_txt.Text
});
}
else
{
MessageBox.Show("Cannot be found");
}
conn2.Close();
}
}
}
else
{
MySqlConnection conn2 = new MySqlConnection("DataSource='" + DoSomething.Server_Param + "';UserID='" + DoSomething.Uid_Param + "';Password='" + DoSomething.Password_Param + "';Database='" + DoSomething.Database_Param + "';PORT=3306;CHARSET=utf8");
conn2.Open();
MySqlCommand cmd = new MySqlCommand();
MySqlDataReader rd;
DataSet ds = new DataSet();
ds.Clear();
cmd.Connection = conn2;
cmd.CommandText = "SELECT id FROM Items where Item_Arabic_Name ='" + Materials_Lookup.Text + "'";
rd = cmd.ExecuteReader();
if (rd.Read())
{
Masrof_Grid.Items.Add(new MyMasrof()
{
Masrof_Material_Code = (rd["id"].ToString()),
Masrof_Material_Name = Materials_Lookup.Text,
Masrof_MAterial_QTY = QTY_txt.Text,
Masrof_Material_Store = StoreName_txt.Text,
MAterial_Curr_Balance = CurrBalance_txt.Text
});
// decimal sum = 0m;
// for (int i = 0; i < Masrof_Grid.Items.Count; i++)
// {
// sum += (decimal.Parse((Masrof_Grid.Columns[7].GetCellContent(Masrof_Grid.Items[i]) as TextBlock).Text));
// }
//// txtSumReal.Text = sum.ToString();
}
else
{
MessageBox.Show("cannot be found");
}
conn2.Close();
}
}
}