Dev的关于XtraGrid的使用2
接着说，GirdControl如何定位和查找指定列显示值的行(注意是列的实显示值，而不是关联数据源列值)
下面请看代码：
using DevExpress.XtraGrid.Views.Base;
using DevExpress.XtraGrid.Columns;
// ...
string searchText = "Japan";
// obtaining the focused view
ColumnView view = (ColumnView)gridControl1.FocusedView;
// obtaining the column bound to the Country field
GridColumn column = view.Columns["Country"];
if(column != null) {
// locating the row
//如果用数据源中的列值，请用ColumnView.LocateByValue
int rhFound = view.LocateByDisplayText(view.FocusedRowHandle + 1, column, searchText);
// focusing the cell
if(rhFound != GridControl.InvalidRowHandle) {
view.FocusedRowHandle = rhFound;
view.FocusedColumn = column;
}
}
另一个查找示例
DevExpress.XtraGrid.Views.Base.ColumnView view = gridControl1.MainView as DevExpress.XtraGrid.Views.Base.ColumnView;
view.BeginUpdate();
try {
int rowHandle = 0;
DevExpress.XtraGrid.Columns.GridColumn col = view.Columns["Category"];
while(true) {
// locating the next row
rowHandle = view.LocateByValue(rowHandle, col, "SPORTS");
// exiting the loop if no row is found
if (rowHandle == DevExpress.XtraGrid.GridControl.InvalidRowHandle)
break;
// perform specific operations on the row found here
// ...
rowHandle++;
}
} finally { view.EndUpdate(); }
将特定编辑框绑定到列 默认的cell编辑框是不可以改变的，即使是在运行时，因为它们是动态创建和注销的。 要想定制，就在设计时修改ColumnEdit吧。
using DevExpress.XtraEditors.Repository;
//Create a repository item for a combo box editor
RepositoryItemComboBox riCombo = new RepositoryItemComboBox();
riCombo.Items.AddRange(new string[] {"London", "Berlin", "Paris"});
//Add the item to the internal repository
gridControl1.RepositoryItems.Add(riCombo);
//Now you can define the repository item as an in-place column editor
colCity.ColumnEdit = riCombo;
另一个运行时绑定列编辑框示例
private void gridView1_CustomRowCellEdit(object sender, DevExpress.XtraGrid.Views.Grid.CustomRowCellEditEventArgs e) {
if (e.Column.FieldName == "FieldName") return;
DevExpress.XtraGrid.Views.Grid.GridView gv = sender as DevExpress.XtraGrid.Views.Grid.GridView;
string fieldName = gv.GetRowCellValue(e.RowHandle, gv.Columns["FieldName"]).ToString();
switch (fieldName) {
case "Population":
e.RepositoryItem = repositoryItemSpinEdit1;
break;
case "Country":
e.RepositoryItem = repositoryItemComboBox1;
break;
case "Capital":
e.RepositoryItem = repositoryItemCheckEdit1;
break;
}
}
检验录入数据是否有效
using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraGrid.Columns;
public bool isValidDate(int day, int month, int year) {
return (day > 0) && (month > 0) && (month <= 12) && (year > 1980) && (year < 2100) && (day <= DateTime.DaysInMonth(year, month));
}
private void gridView1_ValidateRow(object sender, DevExpress.XtraGrid.Views.Base.ValidateRowEventArgs e) {
GridView view = sender as GridView;
GridColumn colDay = view.Columns["Day"];
GridColumn colMonth = view.Columns["Month"];
GridColumn colYear = view.Columns["Year"];
int day = (int)view.GetRowCellValue(e.RowHandle, colDay);
int month = (int)view.GetRowCellValue(e.RowHandle, colMonth);
int year = (int)view.GetRowCellValue(e.RowHandle, colYear);
e.Valid = isValidDate(day, month, year);
if(!e.Valid) {
view.SetColumnError(colDay, "Check the day");
view.SetColumnError(colMonth, "Check the month");
view.SetColumnError(colYear, "Check the year");
}
}
MouseMove捕捉
private void Grid_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
ShowHitInfo(this.gridView1.CalcHitInfo(new Point(e.X, e.Y)));
}
private void ShowHitInfo(DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo hi)
{
DevExpress.XtraGrid.Views.Base.ColumnView cgv =
(DevExpress.XtraGrid.Views.Base.ColumnView)Grid.MainView;
string columnName = hi.Column == null ? "No column" : hi.Column.Caption;
switch(columnName)
{
case "账号":
txtUserName.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
break;
case "密码":
txtPassword.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
break;
case "真实姓名":
txtRealName.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
break;
case "电子邮件":
txtEmail.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
break;
case "角色":
cbRole.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
break;
default:
txtUserName.Text = "Null";
txtPassword.Text = "Null";
txtRealName.Text = "Null";
txtEmail.Text = "Null";
cbRole.Text = "Null";
break;
}
主从表的设置
DataTable dt = pb.GetItemInfoList(Port).Copy(); //返回一个TABLE
dt.TableName = "ItemInfo";
ds.Tables.Add(dt);
DataTable dt2 = pb.GetBuildingInfoList(Port).Copy(); //返回一个TABLE
dt2.TableName = "BuildingInfo";
ds.Tables.Add(dt2);
DataColumn keyColumn = ds.Tables["ItemInfo"].Columns["ITEMINFO_ID"];
DataColumn foreignKeyColumn = ds.Tables["BuildingInfo"].Columns["ITEMINFOID"];
ds.Relations.Add("itembuildinginfo", keyColumn, foreignKeyColumn);
gridControl1.DataSource = ds.Tables["ItemInfo"];
获取从表的当前选择行的某一列（如ID列） 这个时候再使用获取主表当前选择行的某一列的方法是不行的，因为所得到的seletedrowscount=0。使用如下方法得到： 在MASTER表的展开事件中得到detail有的view.然后就可以利用它了。例：
//主表的masterrowexpanded事件
private void gridView1_MasterRowExpanded(object sender, DevExpress.XtraGrid.Views.Grid.CustomMasterRowEventArgs e)
{
detailView = gridView1.GetDetailView(e.RowHandle, e.RelationIndex) as DevExpress.XtraGrid.Views.Grid.GridView;
}
//取得从表的当前行
int[] i = detailView.GetSelectedRows();
DataRowView dt = (DataRowView)detailView.GetRow(i[0]);
//获得当前行某列的值可以使用
dt["列名"].ToString();
//获得当那个列的值。
定义焦点行的方法：
gridView_bcode.FocusedRowHandle = focuseRowInt; //通过设置GridView 的FocusedRowHandle属性
//获取焦点行任意单元格的数据
ColumnView cv = (ColumnView)gridControl_Gongzi.FocusedView;//重新获取此ID 否则无法从表头连删获取不到id
int focusedhandle = cv.FocusedRowHandle;
object rowIdObj = gridView1.GetRowCellValue(focusedhandle, "id");
if (DBNull.Value != rowIdObj)
{
FocusedRow_id = Convert.ToInt32(rowIdObj);
}
//获取焦点行任意单元格的数据
ColumnView cv = (ColumnView)gridControl_Gongzi.FocusedView;//重新获取此ID 否则无法从表头连删获取不到id
int focusedhandle = cv.FocusedRowHandle;
object rowIdObj = gridView1.GetRowCellValue(focusedhandle, "id");
if (DBNull.Value != rowIdObj)
{
FocusedRow_id = Convert.ToInt32(rowIdObj);
}
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//当数据发生变化时执行
private void gridView1_CellValueChanged(object sender, CellValueChangedEventArgs e)
{
int intRowHandle = e.RowHandle;
FocusedRow_bumen = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "bumen"));
FocusedRow_xingming = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "xingming"));
//FocusedRow_jibengongzi = Convert.ToDecimal(gridView1.GetRowCellValue(intRowHandle, "jibengongzi"));
object rowJibengongziObj = gridView1.GetRowCellValue(intRowHandle, "jibengongzi");
if (DBNull.Value != rowJibengongziObj)
{
FocusedRow_jibengongzi = Convert.ToDecimal(rowJibengongziObj);
}
}
//当数据发生变化时执行
private void gridView1_CellValueChanged(object sender, CellValueChangedEventArgs e)
{
int intRowHandle = e.RowHandle;
FocusedRow_bumen = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "bumen"));
FocusedRow_xingming = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "xingming"));
//FocusedRow_jibengongzi = Convert.ToDecimal(gridView1.GetRowCellValue(intRowHandle, "jibengongzi"));
object rowJibengongziObj = gridView1.GetRowCellValue(intRowHandle, "jibengongzi");
if (DBNull.Value != rowJibengongziObj)
{
FocusedRow_jibengongzi = Convert.ToDecimal(rowJibengongziObj);
}
} view plaincopy to clipboardprint?
//设置焦点行的焦点单元格的位置
ColumnView view = (ColumnView)gridControl_Gongzi.FocusedView;
view.FocusedColumn = view.Columns["bumen"];
//设置焦点行的焦点单元格的位置
ColumnView view = (ColumnView)gridControl_Gongzi.FocusedView;
view.FocusedColumn = view.Columns["bumen"]; view plaincopy to clipboardprint?
//当焦点行发生改变时执行 获取选中焦点行id
private void gridView1_FocusedRowChanged(object sender, DevExpress.XtraGrid.Views.Base.FocusedRowChangedEventArgs e)
{
int intRowHandle = e.FocusedRowHandle;
object rowIdObj = gridView1.GetRowCellValue(intRowHandle, "id");
if (DBNull.Value != rowIdObj)//做个判断否则获取不到id后报错
{
FocusedRow_id = Convert.ToInt32(rowIdObj);
}
}
//当焦点行发生改变时执行 获取选中焦点行id
private void gridView1_FocusedRowChanged(object sender, DevExpress.XtraGrid.Views.Base.FocusedRowChangedEventArgs e)
{
int intRowHandle = e.FocusedRowHandle;
object rowIdObj = gridView1.GetRowCellValue(intRowHandle, "id");
if (DBNull.Value != rowIdObj)//做个判断否则获取不到id后报错
{
FocusedRow_id = Convert.ToInt32(rowIdObj);
}
}
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//焦点行的FocusedHandle为：
FocuseRow_Handle = -999998;
//获取焦点行的handle
ColumnView newview = (ColumnView)gridControl_Gongzi.FocusedView;
FocuseRow_Handle = newview.FocusedRowHandle;
//回车添加新行
代码
private void gridView1_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == 13)
{
ColumnView view = (ColumnView)gridControl_Gongzi.FocusedView;
if(view.IsLastRow)
{
if (FocuseRow_Handle == 0)
{
gridView1.AddNewRow();
ColumnView newview = (ColumnView)gridControl_Gongzi.FocusedView;
newview.FocusedColumn = newview.Columns["bumen"];//定位焦点网格的位置
FocuseRow_Handle = newview.FocusedRowHandle;//获取新焦点行的FocuseRowHandle 并初始化全局变量FocuseRow_Handle供保存操作时判断是upd ate还是insert
}
