C#WPF DataGrid在列中搜索值,返回行索引

时间:2015-03-04 17:10:47

标签: c# wpf datagrid

我是C#开发的新手。我正在学习和努力,因为我正在编写一个应用程序 - 最好的学习方法是:)

我希望有人能够帮助我处理我的问题。

我通过 dataGrid1.ItemsSource = dt.DefaultView填充 WPF DataGrid ; 然后让DataGrid自动为我生成列。

用户可以单击DataGrid中的任何行,然后将使用行的数据填充WPF UI上的标题部分 - 这允许用户通过标题编辑行。我不希望他们通过DataGrid进行编辑。

用户可以通过标题字段编辑行,然后单击UPDATE按钮。 UPDATE按钮将运行存储过程,该过程处理所有验证和更新记录。保存记录后,我将关闭网格刷新方法。

刷新网格后,我需要能够搜索DataGrid上的特定列以便选择,设置Focus并滚动到刚刚更新的行。

我在Google上疯狂搜索过,我在DataGrid上找不到如何做到这一点。有关如何在DataGridView上执行此操作的示例,这不是我正在使用的。

非常感谢任何帮助....谢谢

这是我点击按钮

的代码

private void btn_Update_Click(object sender,RoutedEventArgs e)         {

        // variables
        bool isOkToUpdate = true;

        this.Cursor = Cursors.Wait;            

        // Validations of certain fields
        if (txt_FinanceEmpName.Text.Length > 25 )
        {
            MessageBox.Show("The Finance Emp Name must not exceed 25 characters in length. " 
                + txt_FinanceEmpName.Text.Length.ToString()
                , "Maximum characters exceeded"
                , MessageBoxButton.OK, MessageBoxImage.Stop);

            isOkToUpdate = false;
        }

        //
        if (isOkToUpdate == true)
        {
            // create an instance
            DatabaseClass objDatabaseClass = new DatabaseClass(_connectionString);

            // if we are able to open and close the SQL Connection then proceed
            if (objDatabaseClass.CheckSQLConnection())
            {
                try
                {
                    // create instance of SqlConnection class. variable 'con' will hold the instance
                    SqlConnection con = new SqlConnection(_connectionString);

                    con.Open();

                    // use a using for all disposable objects, so that you are sure that they are disposed properly
                    using (SqlCommand cmd = new SqlCommand("usp_mktdata_update_cm_mktdata_emp_name_fits_to_finance", con))
                    {
                        cmd.CommandType = CommandType.StoredProcedure;
                        cmd.Parameters.Add("@IdUnique", SqlDbType.Int).Value = Convert.ToInt32(txt_IdUnique.Text);
                        cmd.Parameters.Add("@FinanceEmpName", SqlDbType.VarChar).Value = txt_FinanceEmpName.Text;
                        cmd.Parameters.Add("@ADWindowsLogon", SqlDbType.VarChar).Value = _windowsUserName;
                        cmd.Parameters.Add("@ADWindowsLogonEMail", SqlDbType.VarChar).Value = _windowsUserNameEMail;
                        cmd.Parameters.Add("@IndActive", SqlDbType.TinyInt).Value = 1;
                        cmd.Parameters.Add("@RecordVersion", SqlDbType.Int).Value = Convert.ToInt32(txt_RecordVersion.Text);
                        //cmd.Parameters.Add("@IdJob", SqlDbType.Int).Value = "DEFAULT";
                        //cmd.Parameters.Add("@IdUser", SqlDbType.Int).Value = "DEFAULT";
                        //cmd.Parameters.Add("@outIdUnique", SqlDbType.Int).Value = "DEFAULT";
                        //cmd.Parameters.Add("@outRecordVersion", SqlDbType.Int).Value = "DEFAULT";
                        //cmd.Parameters.Add("@outInd", SqlDbType.Int).Value = "DEFAULT";
                        //cmd.Parameters.Add("@outMessage", SqlDbType.VarChar).Value = "DEFAULT";

                        cmd.ExecuteNonQuery();
                    }

                    // Last Updated Record
                    txt_LastUpdated_IdUnique.Text = txt_IdUnique.Text;
                    txt_LastUpdated_FitsEmpName.Text = txt_FitsEmpName.Text;
                    txt_LastUpdated_FinanceEmpName.Text = txt_FinanceEmpName.Text;

                    // Refresh the Datagrid - the DataGrid_MonikerName
                    // pass in null for the params in order to fire the event
                    btn_RefreshGrid_Click(null, null);



                    // ****************************************
                // TODO:  After Grid Refresh Search the column ID UNIQUE for the value stored in txt_IdUnique.Text which
                //  was just saved via the stored procedure
                // Once the value is found in the DataGrid need to grab the DataGrid Row INdex in order to 
                // Select the ROW and Set the ROW to the SELECTED ROW and set focus to the DataGrid also will need to Scroll the Grid into View.
                    //
                    // ****************************************


                    con.Close();
                }
                catch (SqlException ex)
                {
                    MessageBox.Show(ex.ToString());                    
                }
            }
            else
            {
                MessageBox.Show("Connection not established to the SQL Server. " + Environment.NewLine + "The SQL Server may be offline or valid credentials are not yet granted.", "SQL Server Connection Error", MessageBoxButton.OK, MessageBoxImage.Error);

                this.Close();
            }
        }   

        this.Cursor = Cursors.Arrow;
    }

2 个答案:

答案 0 :(得分:2)

我也使用DataTable.DefaultView处理系统中的网格。我还将DataGrid分为“MyDataGrid”...在MyDataGrid上,我有一个自定义方法来强制基于其主键加载给定的ID。所以我在网格上有另一个自定义属性,因为它应该在数据视图中找到主键列的名称,即使它可能没有在网格中直观显示。

根据您提供的内容,以下是我原始代码对您特定环境的修改......

public void TryGridRefresh()
{
   int IDToFind = Convert.ToInt32(txt_IdUnique.Text);

   if (IDToFind > -1 && dataGrid1.ItemsSource is DataView )
   {
      foreach( DataRowView drv in (DataView)dataGrid1.ItemsSource )
         if ((int)drv["IdUnique"] == IDToFind)
         {
            // This is the data row view record you want...
            dataGrid1.SelectedItem = drv;
         }
   }
}

所以,在你致电

之后
 btn_RefreshGrid_Click(null, null);

然后致电

TryGridRefresh();

我将数据网格作为所选值的整个ROW而不是每个单元格。所以你可能需要稍微使用对象引用...一旦找到行,你也可以尝试使用dataGrid1.CurrentItem ......

希望这会让你更接近你的最终解决方案。

答案 1 :(得分:0)

 public void TryGridRefresh(string IdUniqueToFind, DataGrid MyDataGrid, string MyGridColumnToSearch)
    {  
        int IDToFind = Convert.ToInt32(IdUniqueToFind);

// this if did not work for me..got errors  
        //if (IDToFind > -1) and (dataGrid_MonikerName.ItemsSource is DataView )
        //{
        foreach (DataRowView drv in (DataView)MyDataGrid.ItemsSource)
        {               
            if ((int)drv[MyGridColumnToSearch] == IDToFind)
            {
                // This is the data row view record you want...
                MyDataGrid.SelectedItem = drv;

                MyDataGrid.ScrollIntoView(drv);
                MyDataGrid.Focus();

                break;
            }
        }
    }       

在网格刷新调用之后调用Method,如下所示: TryGridRefresh(txt_LastUpdated_IdUnique.Text,dataGrid_MonikerName,gridData_ColumnToSearch);

我也不得不改变 datagrid DataRowView从CurrentCell.Item到SelectedItem,以便捕获所选值的整行而不是每个单元格。

// DataRowView _DataView = dataGrid_MonikerName.CurrentCell.Item as DataRowView;             DataRowView _DataView = dataGrid_MonikerName.SelectedItem as DataRowView;