GridView的添加/删除行

Question

我怎么可以添加，删除和编辑多行 “包含文本框” 来的GridView

没有插入到DB

我试图

Gridview1.rows.add(datarow) 

而对于删除

Gridview1.rows.remove(datarow) 

但未检测到所选行

Answer 1

您可以在下面的代码中使用该方法。在所示的addRow方法中，插入新的网格行。逻辑是我们需要将网格重新绑定到包含原始行和新空行的新数据源。您可以使用类似的方法进行删除（创建一个删除了行的新数据源，然后重新绑定网格）。

删除时使用方法deleteRow。我假设你在网格行中有一个复选框控件，其编号为chkDelete，选中时表示该行需要删除。您可以使用deleteRow的方法同时删除多行。

如果您使用以下两种方法添加行并删除行，那么编辑后的文本框会自动保留其新值，即始终保留为editing would then be automatically taken care of。

作出的假设：此外，我假定除了复选框外，网格行中还有3个文本框。因为有3个文本框，所以在下面的方法中创建的DataTable应该包含这3个文本框的3列，这些列应该是字符串类型。

添加一行

protected void addRow() 
{ 
    DataTable dt = new DataTable(); 
    //add code to create columns for this data table 
    //only create columns for textbox data 
    dt.Columns.Add("Column1", typeof(string)); 
    dt.Columns.Add("Column2", typeof(string)); 
    dt.Columns.Add("Column3", typeof(string)); 
    DataRow dr = null; 

    //build a data source of existing rows 
    foreach (GridViewRow gridRow in grid1.Rows) 
    { 
     dr = dt.NewRow(); 

     //set only text box values in new data source 
     //so checkbox column for row selection will be ignored 
     TextBox txtColumn1 = gridRow.FindControl("txtColumn1") as TextBox; 
     TextBox txtColumn2 = gridRow.FindControl("txtColumn2") as TextBox; 
     TextBox txtColumn3 = gridRow.FindControl("txtColumn3") as TextBox; 

     dr[0] = txtColumn1.Text; 
     dr[1] = txtColumn2.Text; 
     dr[2] = txtColumn3.Text; 

     dt.Rows.Add(dr); 
    } 

    //create the row in data sourec for the new grid row 
    dr = dt.NewRow(); 
    dt.Rows.Add(dr); 

    //bind the grid view, which will now show you the new added row in addition to original rows 
    grd.DataSource = dt; 
    grd.DataBind(); 
} 

删除行（S）

protected void deleteRow() 
{ 
    DataTable dt = new DataTable(); 
    //add code to create column for this data table 
    //only set column for textbox columns 
    dt.Columns.Add("Column1", typeof(string)); 
    dt.Columns.Add("Column2", typeof(string)); 
    dt.Columns.Add("Column3", typeof(string)); 

    //build a data source of existing rows 
    foreach (GridViewRow gridRow in grid1.Rows) 
    { 
     //get whether the checkbox for deleting row is checked or not 
     CheckBox chkDelete = gridRow.FindControl("chkDelete") as CheckBox; 
     //do not add original row if it was checked to be deleted 
     if(!chkDelete.Checked) 
     { 
      dr = dt.NewRow(); 

      //set only text box values in new data source 
      //so checkbox column for row selection will be ignored 
      TextBox txtColumn1 = gridRow.FindControl("txtColumn1") as TextBox; 
      TextBox txtColumn2 = gridRow.FindControl("txtColumn2") as TextBox; 
      TextBox txtColumn3 = gridRow.FindControl("txtColumn3") as TextBox; 

      dr[0] = txtColumn1.Text; 
      dr[1] = txtColumn2.Text; 
      dr[2] = txtColumn3.Text; 

      dt.Rows.Add(dr); 
     } 
    } 

    //bind the grid view, which will now NOT have the deleted rows 
    grd.DataSource = dt; 
    grd.DataBind(); 
}