Question

C＃Winforms解决方案 - Visual Studio 2015专业版。

大家好！当我调试我的应用程序时，打开我的表单，单击comboBoxCurso（父组合框）并选择英语，例如，然后单击DataGridView中的comboBoxModulo（子组合框），我收到错误说：

“System.Data.dll中发生了'System.Data.EvaluateException'类型的未处理异常附加信息：无法找到[英文]栏目。“

    private void Alunos_Load(object sender, EventArgs e)

 {

      this.tbl_cursosTableAdapter.Fill(this.bremingtonDataSet.tbl_cursos);

      this.tbl_modulosTableAdapter.Fill(this.bremingtonDataSet.tbl_modulos);

      this.tbl_turmasTableAdapter.Fill(this.bremingtonDataSet.tbl_turmas);

      this.tbl_alunosTableAdapter.Fill(this.bremingtonDataSet.tbl_alunos);

      this.tbl_alunos_subTableAdapter.Fill(this.bremingtonDataSet.tbl_alunos_sub);



      DataView dv = new DataView(bremingtonDataSet.Tables["tbl_modulos"]);

      filteredModulosBS.DataSource = dv;

 }





    private void tbl_alunos_subDataGridView_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)

    {

        if (e.ColumnIndex == comboBoxModulo.Index)

        {

            DataGridViewComboBoxCell dgcb = (DataGridViewComboBoxCell)tbl_alunos_subDataGridView[e.ColumnIndex, e.RowIndex];

            dgcb.DataSource = filteredModulosBS;

            **Error =====> this.filteredModulosBS.Filter = "Código = "+ this.tbl_alunos_subDataGridView[e.ColumnIndex - 1, e.RowIndex].Value.ToString(); <===== Error**


        }

    }





    private void tbl_alunos_subDataGridView_CellEndEdit(object sender, DataGridViewCellEventArgs e)

    {

        if (e.ColumnIndex == this.comboBoxModulo.Index)

        {

            DataGridViewComboBoxCell dgcb = (DataGridViewComboBoxCell)tbl_alunos_subDataGridView[e.ColumnIndex, e.RowIndex];

            dgcb.DataSource = tblmodulosBindingSource;

            this.filteredModulosBS.RemoveFilter();

        }

    }

任何人都可以告诉我如何纠正这行代码？非常感谢您的时间和帮助。我真的很感激！

Answer 1

您需要将过滤条件参数包装在单引号'中。

this.filteredModulosBS.Filter = "Código = '" + this.tbl_alunos_subDataGridView[e.ColumnIndex - 1, e.RowIndex].Value.ToString() + "'";

System.Data.dll中发生了未处理的“System.Data.EvaluateException”类型异常

1 个答案: