DataSet、DataTable和DataGridView知识备忘
2016-01-21 15:47
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datatable中,获取第i行j列的单元格内容:
string str = DataSet.Tables[0].Rows[i][j].ToString();
datagridview中,获取第i行j列的单元格内容:
string str = DataGridview.Rows[i].Cells[j].Value.ToString();
DataGridview的 SelectionMode 属性 设置为 FullRowSelect 之后,获取指定单元格内容:
string str = DataGridview.CurrentRow.Cells[j].Value.ToString() ;
DataGridView 单击一次,即进入单元格编辑状态:
this.dataGridView1.EditMode = System.Windows.Forms.DataGridViewEditMode.EditOnEnter;
datagridview 某一列自动适应列宽:
this.dataGridView1.Columns[j].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
datagridview 中按 enter 键 光标跳至同列下一行
datatable中添加行:
方法一:
DataTable tblDatas = new DataTable("Datas");
DataColumn dc = null;
dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));
dc.AutoIncrement = true;//自动增加
dc.AutoIncrementSeed = 1;//起始为1
dc.AutoIncrementStep = 1;//步长为1
dc.AllowDBNull = false;//
dc = tblDatas.Columns.Add("Product", Type.GetType("System.String"));
dc = tblDatas.Columns.Add("Version", Type.GetType("System.String"));
dc = tblDatas.Columns.Add("Description", Type.GetType("System.String"));
DataRow newRow;
newRow = tblDatas.NewRow();
newRow["Product"] = "水果刀";
newRow["Version"] = "2.0";
newRow["Description"] = "打架专用";
tblDatas.Rows.Add(newRow);
newRow = tblDatas.NewRow();
newRow["Product"] = "折叠凳";
newRow["Version"] = "3.0";
newRow["Description"] = "行走江湖七武器之一";
tblDatas.Rows.Add(newRow);
方法二:
DataTable tblDatas = new DataTable("Datas");
tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));
tblDatas.Columns[0].AutoIncrement = true;
tblDatas.Columns[0].AutoIncrementSeed = 1;
tblDatas.Columns[0].AutoIncrementStep = 1;
tblDatas.Columns.Add("Product", Type.GetType("System.String"));
tblDatas.Columns.Add("Version", Type.GetType("System.String"));
tblDatas.Columns.Add("Description", Type.GetType("System.String"));
tblDatas.Rows.Add(new object[]{null,"a","b","c"});
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
string str = DataSet.Tables[0].Rows[i][j].ToString();
datagridview中,获取第i行j列的单元格内容:
string str = DataGridview.Rows[i].Cells[j].Value.ToString();
DataGridview的 SelectionMode 属性 设置为 FullRowSelect 之后,获取指定单元格内容:
string str = DataGridview.CurrentRow.Cells[j].Value.ToString() ;
DataGridView 单击一次,即进入单元格编辑状态:
this.dataGridView1.EditMode = System.Windows.Forms.DataGridViewEditMode.EditOnEnter;
datagridview 某一列自动适应列宽:
this.dataGridView1.Columns[j].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
datagridview 中按 enter 键 光标跳至同列下一行
datatable中添加行:
方法一:
DataTable tblDatas = new DataTable("Datas");
DataColumn dc = null;
dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));
dc.AutoIncrement = true;//自动增加
dc.AutoIncrementSeed = 1;//起始为1
dc.AutoIncrementStep = 1;//步长为1
dc.AllowDBNull = false;//
dc = tblDatas.Columns.Add("Product", Type.GetType("System.String"));
dc = tblDatas.Columns.Add("Version", Type.GetType("System.String"));
dc = tblDatas.Columns.Add("Description", Type.GetType("System.String"));
DataRow newRow;
newRow = tblDatas.NewRow();
newRow["Product"] = "水果刀";
newRow["Version"] = "2.0";
newRow["Description"] = "打架专用";
tblDatas.Rows.Add(newRow);
newRow = tblDatas.NewRow();
newRow["Product"] = "折叠凳";
newRow["Version"] = "3.0";
newRow["Description"] = "行走江湖七武器之一";
tblDatas.Rows.Add(newRow);
方法二:
DataTable tblDatas = new DataTable("Datas");
tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));
tblDatas.Columns[0].AutoIncrement = true;
tblDatas.Columns[0].AutoIncrementSeed = 1;
tblDatas.Columns[0].AutoIncrementStep = 1;
tblDatas.Columns.Add("Product", Type.GetType("System.String"));
tblDatas.Columns.Add("Version", Type.GetType("System.String"));
tblDatas.Columns.Add("Description", Type.GetType("System.String"));
tblDatas.Rows.Add(new object[]{null,"a","b","c"});
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
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