本文介绍了从Datagrid单元格获取字符串值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我成功获取了所选行和我想要的单元格信息。
但它看起来像System.Windows.Controls.DataGridCell：ABCDEFG
我只需要ABCDEFG部分作为字符串变量使用。
我已经尝试了所有的铸造和转换方法没有成功...
错误1无法将类型'System.Windows.Controls.DataGridCell'隐式转换为'string'
任何人都可以协助请
大班使用的扩展方法：
private void dataGrid1_SelectionChanged（object sender，SelectionChangedEventArgs e）
{
var selectedRow = dataGrid1.GetSelectedRow（）;
var columnCellSC = dataGrid1.GetCell（selectedRow，0）;
//这就是我需要在剩余的代码中使用返回值作为字符串
}
附加类：
使用System;
使用System.Collections.Generic;
使用System.Linq;
使用System.Text;
使用System.Windows.Media;使用System.Windows.Controls
;
使用System.Windows.Controls.Primitives;
使用System.Threading.Tasks;
使用System.Data;
名称空间DataGridHelpers
{
///< summary>
/// DataGrid的扩展方法
///< / summary>
公共静态类DataGridHelper
{
///< summary>
///获取元素的可视子元素
///< / summary>
///< typeparam name =T>预期类型< / typeparam>
///< param name =parent>预期元素的父级< / param>
///< returns>可视子项< / returns>
public static T GetVisualChild< T>（Visual parent）其中T：Visual
{
T child = default（T）;
int numVisuals = VisualTreeHelper.GetChildrenCount（parent）;
for（int i = 0; i< numVisuals; i ++）
{
Visual v =（Visual）VisualTreeHelper.GetChild（parent，i）;
child = v为T;
if（child == null）
{
child = GetVisualChild< T>（v）;
}
if（child！= null）
{
break;
}
}
返回孩子;
}
///< summary>
///获取DataGrid
///< / summary>的指定单元格
///< param name =dataGrid1> DataGrid实例< / param>
///< param name =row>单元格的行< / param>
///< param name =column>单元格的列索引< / param>
///< returns> DataGrid的单元格< / returns>
public static DataGridCell GetCell（this DataGrid dataGrid1，DataGridRow row，int column）
{
if（row！= null）
{
DataGridCellsPresenter presenter = GetVisualChild< DataGridCellsPresenter> ;（行）;
if（presenter == null）
{
dataGrid1.ScrollIntoView（row，dataGrid1.Columns [column]）;
presenter = GetVisualChild< DataGridCellsPresenter>（row）;
}
DataGridCell cell =（DataGridCell）presenter.ItemContainerGenerator.ContainerFromIndex（column）;
返回单元格;
}
返回null;
}
///< summary>
///获取DataGrid
///< / summary>的指定单元格
///< param name =grid> DataGrid实例< / param>
///< param name =row>单元格的行索引< / param>
///< param name =column>单元格的列索引< / param>
///< returns> DataGrid的单元格< / returns>
public static DataGridCell GetCell（this DataGrid grid，int row，int column）
{
DataGridRow rowContainer = grid.GetRow（row）;
返回grid.GetCell（rowContainer，column）;
}
///< summary>
///获取DataGrid的指定行
///< / summary>
///< param name =grid> DataGrid实例< / param>
///< param name =index>行的索引< / param>
///< returns> DataGrid的一行< / returns>
public static DataGridRow GetRow（this DataGrid grid，int index）
{
DataGridRow row =（DataGridRow）grid.ItemContainerGenerator.ContainerFromIndex（index）;
if（row == null）
{
//可以虚拟化，进入视图并重试。
grid.UpdateLayout（）;
grid.ScrollIntoView（grid.Items [index]）;
row =（DataGridRow）grid.ItemContainerGenerator.ContainerFromIndex（index）;
}
返回行;
}
///< summary>
///获取DataGrid的选定行
///< / summary>
///< param name =grid> DataGrid实例< / param>
///< returns>< / returns>
public static DataGridRow GetSelectedRow（this DataGrid grid）
{
return（DataGridRow）grid.ItemContainerGenerator.ContainerFromItem（grid.SelectedItem）;
}
}
}
解决方案
I successfully get the row selected and the cell info I want.
But it looks like this "System.Windows.Controls.DataGridCell: ABCDEFG"
I only need the ABCDEFG part to use as a string variable.
I’ve tried all the casting and conversion methods with no success…
Error 1 Cannot implicitly convert type 'System.Windows.Controls.DataGridCell' to 'string'
can anyone assist please
Extension methods used from main class:
private void dataGrid1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var selectedRow = dataGrid1.GetSelectedRow();
var columnCellSC = dataGrid1.GetCell(selectedRow, 0);
//THIS IS WHERE I NEED TO BE ABLE TO USE THE RETURNED VALUES AS STRINGS IN THE REST OF MY CODE
}
ADDITIONAL CLASS:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Media;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Threading.Tasks;
using System.Data;
namespace DataGridHelpers
{
/// <summary>
/// Extension methods for DataGrid
/// </summary>
public static class DataGridHelper
{
/// <summary>
/// Gets the visual child of an element
/// </summary>
/// <typeparam name="T">Expected type</typeparam>
/// <param name="parent">The parent of the expected element</param>
/// <returns>A visual child</returns>
public static T GetVisualChild<T>(Visual parent) where T : Visual
{
T child = default(T);
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
child = v as T;
if (child == null)
{
child = GetVisualChild<T>(v);
}
if (child != null)
{
break;
}
}
return child;
}
/// <summary>
/// Gets the specified cell of the DataGrid
/// </summary>
/// <param name="dataGrid1">The DataGrid instance</param>
/// <param name="row">The row of the cell</param>
/// <param name="column">The column index of the cell</param>
/// <returns>A cell of the DataGrid</returns>
public static DataGridCell GetCell(this DataGrid dataGrid1, DataGridRow row, int column)
{
if (row != null)
{
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
if (presenter == null)
{
dataGrid1.ScrollIntoView(row, dataGrid1.Columns[column]);
presenter = GetVisualChild<DataGridCellsPresenter>(row);
}
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
return cell;
}
return null;
}
/// <summary>
/// Gets the specified cell of the DataGrid
/// </summary>
/// <param name="grid">The DataGrid instance</param>
/// <param name="row">The row index of the cell</param>
/// <param name="column">The column index of the cell</param>
/// <returns>A cell of the DataGrid</returns>
public static DataGridCell GetCell(this DataGrid grid, int row, int column)
{
DataGridRow rowContainer = grid.GetRow(row);
return grid.GetCell(rowContainer, column);
}
/// <summary>
/// Gets the specified row of the DataGrid
/// </summary>
/// <param name="grid">The DataGrid instance</param>
/// <param name="index">The index of the row</param>
/// <returns>A row of the DataGrid</returns>
public static DataGridRow GetRow(this DataGrid grid, int index)
{
DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
if (row == null)
{
// May be virtualized, bring into view and try again.
grid.UpdateLayout();
grid.ScrollIntoView(grid.Items[index]);
row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
}
return row;
}
/// <summary>
/// Gets the selected row of the DataGrid
/// </summary>
/// <param name="grid">The DataGrid instance</param>
/// <returns></returns>
public static DataGridRow GetSelectedRow(this DataGrid grid)
{
return (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(grid.SelectedItem);
}
}
} 解决方案
这篇关于从Datagrid单元格获取字符串值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！