c＃中的DataGridViewComboBox列＃

Question

我无法清除DataTable绑定到（cnsmNm）datagridviewCombobox列。在新的按钮点击我清除数据

dtCnsmbl = dsCnsmspplr.Tables[0]; 
      dtCnsmbl.Rows.Clear(); 
      cnsmNm.DataSource = dtCnsmbl; 
      cnsmNm.DisplayMember = "cnsm_Name"; 
      cnsmNm.ValueMember = "cnsm_Id"; 

在文本框验证（外的DataGridView）我将数据绑定到DataGridView的组合框柱

   dtqttndtls = dssplrdtls.Tables[3]; 
       DataTable dtmerge = new DataTable(); 
       dtmerge.Columns.Add("cnsm_Id", typeof(Int32)); 
       dtmerge.Columns.Add("cnsm_Name"); 
       foreach (DataRow drmrg in dtqttndtls.Rows) 
       { 
        DataRow drnew = dtmerge.NewRow(); 
        drnew["cnsm_Id"] = drmrg["cnsm_Id"]; 
        drnew["cnsm_Name"] = drmrg["cnsm_Name"]; 
        dtmerge.Rows.Add(drnew); 
       } 
       dtCnsmbl.Merge(dtmerge); 
       cnsmNm.DataSource = dtCnsmbl; 
       cnsmNm.DisplayMember = "cnsm_Name"; 
       cnsmNm.ValueMember = "cnsm_Id"; 

填充Datagridviewcombobox柱后我不能够清除DataTable.Please帮助我是紧急的。我是新来的DataGridView

Answer 1

嗨，我想这

 dtCnsmbl = dsCnsmspplr.Tables[0]; 
     dtCnsmbl.Rows.Clear(); 
     cnsmNm.DataSource = dtCnsmbl; 
     cnsmNm.DisplayMember = "cnsm_Name"; 
     cnsmNm.ValueMember = "cnsm_Id"; 

写这个

 DataTable newdata = dsCnsmspplr.Tables[0].Clone(); 
     cnsmNm.DataSource = newdata; 
     cnsmNm.DisplayMember = "cnsm_Name"; 
     cnsmNm.ValueMember = "cnsm_Id";