C# .NET WinForm datagridview 中的DataGridViewComboBox 设置初始值 怎么设？ 绑定了一个DataTable ．要设置初始值．WinForm 的 dataGridView 里的 DataGridViewComboBox 列 初始值
设置一个文本,已经绑定了.可是没有显示 一个默认值,现在想写上一个默认值.
设置一个文本,已经绑定了.可是没有显示 一个默认值,现在想写上一个默认值.
调试欢乐多
DisplayName, ValueMember变设吧? 再把DataPropertyName这个设对了应该没问题的.但前提是你的Table和DataGridView的数据有1:n的关系, 通过DataPropertyName里设置的这个字段.
cmbox.DataPropertyName= datagrid的数据源的要绑定的列；
cmbox.d...Member="下拉框显示的TEXT";
cmbox.ValueMember="隐藏的值"；
DataGridViewComboBoxColumn csex = new DataGridViewComboBoxColumn();
csex.DataPropertyName = "sSex";
csex.HeaderText = "性别";
DataTable dt = new DataTable();
dt.Columns.Add("sexname");
dt.Columns.Add("sexvalue");
DataRow dr = dt.NewRow();
dr[0] = "男";
dr[1] = "1";
dt.Rows.Add(dr);
DataRow dr1 = dt.NewRow();
dr1[0] = "女";
dr1[1] = "2";
dt.Rows.Add(dr1);
csex.DataSource = dt;
csex.ValueMember = "sexvalue";
csex.DisplayMember = "sexname";
this.datagridview1.Columns.Add(csex);
这只是为 datagridview 中的DataGridViewComboBox 设置了一个数据源，
并没有为DataGridViewComboBox设置 上初始值？
初始值 可以是 数据源内，亦可手动指定。都可以，只要有值便可，
{
public Combox()
{
InitializeComponent();
} private void Combox_Load(object sender, EventArgs e)
{
// 绑定性别下拉列表框
BindSex(); //绑定数据表
BindData(); // 设置下拉列表框不可见
cmb_Temp.Visible = false; // 添加下拉列表框事件
cmb_Temp.SelectedIndexChanged += new EventHandler(cmb_Temp_SelectedIndexChanged); // 将下拉列表框加入到DataGridView控件中
this.dgv_User.Controls.Add(cmb_Temp);
} /// <summary>
/// 绑定性别下拉列表框
/// </summary>
private void BindSex()
{
DataTable dtSex = new DataTable();
dtSex.Columns.Add("Value");
dtSex.Columns.Add("Name");
DataRow drSex;
drSex = dtSex.NewRow();
drSex[0] = "1";
drSex[1] = "男";
dtSex.Rows.Add(drSex);
drSex = dtSex.NewRow();
drSex[0] = "0";
drSex[1] = "女";
dtSex.Rows.Add(drSex);
cmb_Temp.ValueMember = "Value";
cmb_Temp.DisplayMember = "Name";
cmb_Temp.DataSource = dtSex;
cmb_Temp.DropDownStyle = ComboBoxStyle.DropDownList;
} /// <summary>
/// 为避免连接数据库，这里手工构造数据表，实际应用中应从数据库中获取
/// </summary>
private void BindData()
{
DataTable dtData = new DataTable();
dtData.Columns.Add("ID");
dtData.Columns.Add("Name");
dtData.Columns.Add("Sex");
DataRow drData;
drData = dtData.NewRow();
drData[0] = 1;
drData[1] = "张三";
drData[2] = "1";
dtData.Rows.Add(drData);
drData = dtData.NewRow();
drData[0] = 2;
drData[1] = "李四";
drData[2] = "1";
dtData.Rows.Add(drData);
drData = dtData.NewRow();
drData[0] = 3;
drData[1] = "王五";
drData[2] = "1";
dtData.Rows.Add(drData);
drData = dtData.NewRow();
drData[0] = 4;
drData[1] = "小芳";
drData[2] = "0";
dtData.Rows.Add(drData);
drData = dtData.NewRow();
drData[0] = 5;
drData[1] = "小娟";
drData[2] = "0";
dtData.Rows.Add(drData);
drData = dtData.NewRow();
drData[0] = 6;
drData[1] = "赵六";
drData[2] = "1";
dtData.Rows.Add(drData);
this.dgv_User.DataSource = dtData;
} // 当用户移动到性别这一列时单元格显示下拉列表框
private void dgv_User_CurrentCellChanged(object sender, EventArgs e)
{
try
{
if (this.dgv_User.CurrentCell.ColumnIndex == 2)
{
Rectangle rect = dgv_User.GetCellDisplayRectangle(dgv_User.CurrentCell.ColumnIndex, dgv_User.CurrentCell.RowIndex, false);
string sexValue = dgv_User.CurrentCell.Value.ToString();
if (sexValue == "1")
{
cmb_Temp.Text = "男";
}
else
{
cmb_Temp.Text = "女";
}
cmb_Temp.Left = rect.Left;
cmb_Temp.Top = rect.Top;
cmb_Temp.Width = rect.Width;
cmb_Temp.Height = rect.Height;
cmb_Temp.Visible = true;
}
else
{
cmb_Temp.Visible = false;
}
}
catch
{
}
} // 当用户选择下拉列表框时改变DataGridView单元格的内容
private void cmb_Temp_SelectedIndexChanged(object sender, EventArgs e)
{
if (( (ComboBox)sender ).Text == "男")
{
dgv_User.CurrentCell.Value = "男";
dgv_User.CurrentCell.Tag = "1";
}
else
{
dgv_User.CurrentCell.Value = "女";
dgv_User.CurrentCell.Tag = "0";
}
} // 滚动DataGridView时将下拉列表框设为不可见
private void dgv_User_Scroll(object sender, ScrollEventArgs e)
{
this.cmb_Temp.Visible = false;
} // 改变DataGridView列宽时将下拉列表框设为不可见
private void dgv_User_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
{
this.cmb_Temp.Visible = false;
} // 绑定数据表后将性别列中的每一单元格的Value和Tag属性（Tag为值文本，Value为显示文本）
private void dgv_User_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
for (int i = 0; i < this.dgv_User.Rows.Count; i++)
{
if (dgv_User.Rows[i].Cells[2].Value != null && dgv_User.Rows[i].Cells[2].ColumnIndex == 2)
{
dgv_User.Rows[i].Cells[2].Tag = dgv_User.Rows[i].Cells[2].Value.ToString();
if (dgv_User.Rows[i].Cells[2].Value.ToString() == "1")
{
dgv_User.Rows[i].Cells[2].Value = "男";
}
else if (dgv_User.Rows[i].Cells[2].Value.ToString() == "0")
{
dgv_User.Rows[i].Cells[2].Value = "女";
}
}
}
}
}